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Journal articles on the topic 'Volcano Teide'

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Published: 10 March 2023

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1

Alonso, Mar, Eleazar Padrón, Hirochika Sumino, Pedro A. Hernández, Gladys V. Melián, María Asensio-Ramos, Fátima Rodríguez, et al. "Heat and Helium-3 Fluxes from Teide Volcano, Canary Islands, Spain." Geofluids 2019 (June 23, 2019): 1–12. http://dx.doi.org/10.1155/2019/3983864.

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During July 2016, the first integrated heat flow, CO2, and 3He emission survey was conducted across 0.5 km2 of the summit cone and crater of Teide volcano, Tenerife, Canary Islands, Spain. The thermal energy released from Teide summit cone by diffuse degassing was 2.2 MW, and the heat flux calculated through Dawson’s method was 8.1 MW, difference due to the comparison of purely convective areas as the crater with diffusive areas as the flanks of the volcano. Diffuse CO2 output was 211±20 t d-1, and 3He emission was estimated to be within a range between 0.35 and 0.89 mol y-1. The obtained values of diffuse degassing and heat fluxes are close to others obtained for similar volcanic areas. The calculation of 3He/heat ratio for the first time in this volcanic system supports the presence of an important mantle source for the degassing of Teide volcano.

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2

Carracedo, Juan Carlos, Valentin R. Troll, Francisco J. Pérez, Eduardo Rodríguez Badiola, Alex Hansen Machín, Raphael Paris, Hervé Guillou, and Stéphane Scaillet. "Recent unrest at Canary Islands' Teide Volcano?" Eos, Transactions American Geophysical Union 87, no. 43 (October 24, 2006): 462–65. http://dx.doi.org/10.1029/2006eo430003.

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3

Vila, J., R. Ortiz, M. Tárraga, R. Macià, A. García, D. Kumar, and A. M. Correig. "Near-Real time analysis of seismic data of active volcanoes: Software implementations of time sequence data analysis." Natural Hazards and Earth System Sciences 8, no. 4 (July 31, 2008): 789–94. http://dx.doi.org/10.5194/nhess-8-789-2008.

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Abstract. This paper presents the development and applications of a software-based quality control system that monitors volcano activity in near-real time. On the premise that external seismic manifestations provide information directly related to the internal status of a volcano, here we analyzed variations in background seismic noise. By continuous analysis of variations in seismic waveforms, we detected clear indications of changes in the internal status. The application of this method to data recorded in Villarrica (Chile) and Tungurahua (Ecuador) volcanoes demonstrates that it is suitable to be used as a forecasting tool. A recent application of this developed software-based quality control to the real-time monitoring of Teide – Pico Viejo volcanic complex (Spain) anticipated external episodes of volcanic activity, thus corroborating the advantages and capacity of the methodology when implemented as an automatic real-time procedure.

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4

García, Alicia, Ramon Ortiz, Jose M. Marrero, Nieves S´nchez, Josep Vila, Antoni M. Correig, Ramon Marcià, Reinoud Sleeman, and Marta Tárraga. "Monitoring the reawakening of Canary Islands' Teide Volcano." Eos, Transactions American Geophysical Union 87, no. 6 (2006): 61. http://dx.doi.org/10.1029/2006eo060001.

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5

Pérez, Nemesio M., and Pedro A. Hernández. "Comment on “Recent unrest at Canary Islands' Teide Volcano?”." Eos, Transactions American Geophysical Union 88, no. 46 (November 13, 2007): 488. http://dx.doi.org/10.1029/2007eo460008.

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6

Zahorec, Pavol, Peter Vajda, Juraj Papčo, Sergio Sainz-Maza Aparicio, and Jorge Pereda De Pablo. "Prediction of vertical gradient of gravity and its significance for volcano monitoring – example from Teide volcano." Contributions to Geophysics and Geodesy 46, no. 3 (September 1, 2016): 203–20. http://dx.doi.org/10.1515/congeo-2016-0013.

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Abstract We present a detailed calculation of the topographic contribution to the vertical gradient of gravity (VGG) based on high-resolution digital elevation model (DEM) and new developed software (Toposk) for the purpose of predicting the actual VGGs in the field. The calculations presented here were performed for the Central Volcanic Complex (CVC) of Tenerife. We aimed at identifying the most extreme VGGs within the CVC, as well as predicting the VGGs at benchmarks of the former microgravity/deformation network set up to monitor the 2004/5 unrest. We have carried out an observational campaign in June 2016 to verify the predicted VGG values, both the extreme ones and those at the benchmarks. The comparison between the predicted and the in-situ verified VGGs is presented here. We demonstrate the sensitivity of the VGG prediction to the choice of the topo-rock density, which is inherent to the volcanic areas with high variability of rock densities. We illustrate the significance of the use of actual VGG in volcano monitoring microgravimetric surveys on a couple of benchmarks of the CVC network.

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7

Tárraga, M., R. Carniel, R. Ortiz, J. M. Marrero, and A. García. "On the predictability of volcano-tectonic events by low frequency seismic noise analysis at Teide-Pico Viejo volcanic complex, Canary Islands." Natural Hazards and Earth System Sciences 6, no. 3 (May 15, 2006): 365–76. http://dx.doi.org/10.5194/nhess-6-365-2006.

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Abstract. The island of Tenerife (Canary Islands, Spain), is showing possible signs of reawakening after its last basaltic strombolian eruption, dated 1909 at Chinyero. The main concern relates to the central active volcanic complex Teide - Pico Viejo, which poses serious hazards to the properties and population of the island of Tenerife (Canary Islands, Spain), and which has erupted several times during the last 5000 years, including a subplinian phonolitic eruption (Montaña Blanca) about 2000 years ago. In this paper we show the presence of low frequency seismic noise which possibly includes tremor of volcanic origin and we investigate the feasibility of using it to forecast, via the material failure forecast method, the time of occurrence of discrete events that could be called Volcano-Tectonic or simply Tectonic (i.e. non volcanic) on the basis of their relationship to volcanic activity. In order to avoid subjectivity in the forecast procedure, an automatic program has been developed to generate forecasts, validated by Bayes theorem. A parameter called "forecast gain" measures (and for the first time quantitatively) what is gained in probabilistic terms by applying the (automatic) failure forecast method. The clear correlation between the obtained forecasts and the occurrence of (Volcano-)Tectonic seismic events - a clear indication of a relationship between the continuous seismic noise and the discrete seismic events - is the explanation for the high value of this "forecast gain" in both 2004 and 2005 and an indication that the events are Volcano-Tectonic rather than purely Tectonic.

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8

Del Pezzo, E., M. La Rocca, and J. Ibanez. "Observations of high-frequency scattered waves using dense arrays at Teide Volcano." Bulletin of the Seismological Society of America 87, no. 6 (December 1, 1997): 1637–47. http://dx.doi.org/10.1785/bssa0870061637.

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Abstract A study of the seismic coda of seven small earthquakes recorded on the Teide Volcano-Canary Islands (Spain) was carried out using a temporary, small-aperture, 12-station, seismic array. The purpose was to measure backazimuth, apparent velocity and the type of waves that compose the coda in the frequency range 4 to 6 Hz. We used the zero-lag cross-correlation (ZLC) method to obtain the components of the wave vector and three-component analysis techniques based on the covariance matrix of the signal in the time domain to investigate the polarization properties of the signals. The results show that a great part of the coda signals in the analyzed frequency range are almost uncorrelated, while a low number of isolated correlated arrivals show an apparent slowness between 2 × 10−3 and 2.5 × 10−4 sec/m and an almost random distribution of backazimuths. The correlated arrivals have been interpreted as generated by strong scatterers, probably related to the presence, in the study area, of surface topography irregularities (the volcanic cone and the caldera rim). The wave type varies from pure S-type waves to mixed surface waves with some Rayleigh components.

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9

Battaglia, Maurizio, Joachim Gottsmann, Daniele Carbone, and José Fernández. "4D volcano gravimetry." GEOPHYSICS 73, no. 6 (November 2008): WA3—WA18. http://dx.doi.org/10.1190/1.2977792.

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Time-dependent gravimetric measurements can detect subsurface processes long before magma flow leads to earthquakes or other eruption precursors. The ability of gravity measurements to detect subsurface mass flow is greatly enhanced if gravity measurements are analyzed and modeled with ground-deformation data. Obtaining the maximum information from microgravity studies requires careful evaluation of the layout of network benchmarks, the gravity environmental signal, and the coupling between gravity changes and crustal deformation. When changes in the system under study are fast (hours to weeks), as in hydrothermal systems and restless volcanoes, continuous gravity observations at selected sites can help to capture many details of the dynamics of the intrusive sources. Despite the instrumental effects, mainly caused by atmospheric temperature, results from monitoring at Mt. Etna volcano show that continuous measurements are a powerful tool for monitoring and studying volcanoes.Several analytical and numerical mathematical models can beused to fit gravity and deformation data. Analytical models offer a closed-form description of the volcanic source. In principle, this allows one to readily infer the relative importance of the source parameters. In active volcanic sites such as Long Valley caldera (California, U.S.A.) and Campi Flegrei (Italy), careful use of analytical models and high-quality data sets has produced good results. However, the simplifications that make analytical models tractable might result in misleading volcanological inter-pretations, particularly when the real crust surrounding the source is far from the homogeneous/isotropic assumption. Using numerical models allows consideration of more realistic descriptions of the sources and of the crust where they are located (e.g., vertical and lateral mechanical discontinuities, complex source geometries, and topography). Applications at Teide volcano (Tenerife) and Campi Flegrei demonstrate the importance of this more realistic description in gravity calculations.

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10

Berlanga-Labari, Carlos, Leyre Catalán, José F. Palacio, Gurutze Pérez, and David Astrain. "Corrosion Behavior in Volcanic Soils: In Search of Candidate Materials for Thermoelectric Devices." Materials 14, no. 24 (December 12, 2021): 7657. http://dx.doi.org/10.3390/ma14247657.

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Thermoelectric generators have emerged as an excellent solution for the energy supply of volcanic monitoring stations due to their compactness and continuous power generation. Nevertheless, in order to become a completely viable solution, it is necessary to ensure that their materials are able to resist in the acidic environment characteristic of volcanoes. Hence, the main objective of this work is to study the resistance to corrosion of six different metallic materials that are candidates for use in the heat exchangers. For this purpose, the metal probes have been buried for one year in the soil of the Teide volcano (Spain) and their corrosion behavior has been evaluated by using different techniques (OM, SEM, and XRD). The results have shown excessive corrosion damage to the copper, brass, and galvanized steel tubes. After evaluating the corrosion behavior and thermoelectric performance, AISI 304 and AISI 316 stainless steels are proposed for use as heat exchangers in thermoelectric devices in volcanic environments.

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11

Carracedo, Juan Carlos, Valentin R. Troll, Francisco Pérez Torrado, Alex Hansen, Eduardo Rodríguez Badiola, Raphael Paris, Hervé Guillou, and Stéphane Scaillet. "Reply to Comment on “Recent unrest at Canary Islands' Teide Volcano?”." Eos, Transactions American Geophysical Union 88, no. 46 (November 13, 2007): 488. http://dx.doi.org/10.1029/2007eo460009.

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12

De Barros, L., F. Martini, C. J. Bean, A. Garcia-Yeguas, and J. Ibáñez. "Imaging magma storage below Teide volcano (Tenerife) using scattered seismic wavefields." Geophysical Journal International 191, no. 2 (September 7, 2012): 695–706. http://dx.doi.org/10.1111/j.1365-246x.2012.05637.x.

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13

Amici, S., A. Piscini, M. F. Buongiorno, and D. Pieri. "Geological classification of Volcano Teide by hyperspectral and multispectral satellite data." International Journal of Remote Sensing 34, no. 9-10 (October 30, 2012): 3356–75. http://dx.doi.org/10.1080/01431161.2012.716913.

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14

Martín Moreno, R. "Snow characteristics, distribution and disappearance in a subtropical volcano (Teide, Canary Islands)." Cryosphere Discussions 5, no. 1 (January 7, 2011): 75–93. http://dx.doi.org/10.5194/tcd-5-75-2011.

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Abstract. An analysis is carried out of the snow characteristics, distribution and disappearance on a subtropical volcano. Teide (28° 16′ N–16° 38′ W), is a stratovolcano with the highest altitude in Spanish territory at 3718 m a.s.l. It is characterized by an arid climate, with only 12.7 days of snow per year and very clear skies during most of the year. The snow cover is rarely continuous even during the cold season. In addition, the particular geothermal conditions of its ground, the layout of the lava flows from the crater, and not only its subtropical latitudinal position, are responsible for its special snow distribution and ablation processes, such as the banded and radial snow pattern, the hollows in the base layer of the snowpack and snow penitents. These features create a unique snow cover within the high mountain environments.

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15

Pérez, Nemesio M., Shun'ichi Nakai, Hiroshi Wakita, Pedro A. Hernández, and José M. Salazar. "Helium-3 emission in and around Teide Volcano, Tenerife, Canary Islands, Spain." Geophysical Research Letters 23, no. 24 (December 1, 1996): 3531–34. http://dx.doi.org/10.1029/96gl03470.

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16

Gómez-Ortiz, D., S. Martín-Velázquez, T. Martín-Crespo, A. Márquez, J. Lillo, I. López, and F. Carreño. "Characterization of volcanic materials using ground penetrating radar: A case study at Teide volcano (Canary Islands, Spain)." Journal of Applied Geophysics 59, no. 1 (May 2006): 63–78. http://dx.doi.org/10.1016/j.jappgeo.2005.07.007.

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17

Andújar, J., F. Costa, and J. Martí. "Magma storage conditions of the last eruption of Teide volcano (Canary Islands, Spain)." Bulletin of Volcanology 72, no. 4 (December 1, 2009): 381–95. http://dx.doi.org/10.1007/s00445-009-0325-3.

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18

García-Fernandez, M., A. Kijko, J. C. Carracedo, and V. Soler. "Optimum station distribution to monitor seismic activity of Teide Volcano, Tenerife, Canary Islands." Journal of Volcanology and Geothermal Research 35, no. 3 (November 1988): 195–204. http://dx.doi.org/10.1016/0377-0273(88)90016-9.

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19

Dóniz Páez, Javier, and Rafael Becerra Ramírez. "Geomorfositios de interés volcano turístico en una montaña subtropical: el Parque Nacional del Teide (Canarias, España)." Pirineos 175 (October 22, 2020): 061. http://dx.doi.org/10.3989/pirineos.2020.175011.

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El Parque Nacional del Teide (PNT) en Tenerife recibe más de tres millones de visitantes al año atraídos por la diversidad paisajística de una alta montaña subtropical que es Patrimonio de la Humanidad de la Unesco. El objetivo del trabajo es seleccionar y evaluar geomorfositios con interés volcano turístico que diversifiquen la oferta dentro del PNT y en la isla. La metodología empleada se basa en identificar y seleccionar los sitios más representativos, mejor conservados y más accesibles y evaluar sus valores científicos, añadidos y de uso y gestión. Los diez geomorfositios seleccionados son los que mejor representan la diversidad del patrimonio natural y cultural del PNT y están acordes con la aproximación geográfica del geoturismo, acogiendo casi la totalidad de los atractivos del volcano turismo. En líneas generales los valores científicos (0,62) de todos los geomorfositios estudiados están por encima de los añadidos (0,44), lo que parece estar acorde con la protección y conservación de este sitio como parque nacional.

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20

Awadallah, Shadia, David Moure, and Pedro Torres-González. "An Internet of Things (IoT) Application on Volcano Monitoring." Sensors 19, no. 21 (October 26, 2019): 4651. http://dx.doi.org/10.3390/s19214651.

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In the last few years, there has been a huge interest in the Internet of Things (hereinafter IoT) field. Among the large number of IoT technologies, the low-power wide-area network (hereinafter LPWAN) has emerged providing low power, low data-rate communication over long distances, enabling battery-operated devices to operate for long time periods. This paper introduces an application of long-range (hereinafter LoRa) technology, one of the most popular LPWANs, to volcanic surveillance. The first low-power and low-cost wireless network based on LoRa to monitor the soil temperature in thermal anomaly zones in volcanic areas has been developed. A total of eight thermometers (end devices) have been deployed on a Teide volcano in Tenerife (Canary Islands). In addition, a repeater device was developed to extend the network range when the gateway did not have a line of sight connection with the thermometers. Combining LoRa communication capabilities with microchip microcontrollers (end devices and repeater) and a Raspberry Pi board (gateway), three main milestones have been achieved: (i) extreme low-power consumption, (ii) real-time and proper temperature acquisition, and (iii) a reliable network operation. The first results are shown. These results provide enough quality for a proper volcanic surveillance.

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21

Carracedo, J. C., E. R. Badiola, H. Guillou, M. Paterne, S. Scaillet, F. J. P. Torrado, R. Paris, U. Fra-Paleo, and A. Hansen. "Eruptive and structural history of Teide Volcano and rift zones of Tenerife, Canary Islands." Geological Society of America Bulletin 119, no. 9-10 (September 1, 2007): 1027–51. http://dx.doi.org/10.1130/b26087.1.

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22

Almendros, J., J. M. Ibáñez, G. Alguacil, J. Morales, E. Del Pezzo, M. La Rocca, R. Ortiz, V. Araña, and M. J. Blanco. "A double seismic antenna experiment at teide Volcano: existence of local seismicity and lack of evidences of Volcanic tremor." Journal of Volcanology and Geothermal Research 103, no. 1-4 (December 2000): 439–62. http://dx.doi.org/10.1016/s0377-0273(00)00236-5.

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23

Castro-Almaz�n, J. A., J. de la Nuez, M. C. Mart�n, M. L. Quesada, E. Santana, V. Soler, R. T. Vi�as, et al. "High CO 2 Levels in Boreholes at El Teide Volcano Complex (Tenerife, Canary Islands): Implications for Volcanic Activity Monitoring." Pure and Applied Geophysics 161, no. 7 (July 1, 2004): 1519–32. http://dx.doi.org/10.1007/s00024-004-2518-1.

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24

Hernández, Pedro A., Nemesio M. Pérez, José M. Salazar, Shun'ichi Nakai, Kenji Notsu, and Hiroshi Wakita. "Diffuse emission of carbon dioxide, methane, and helium-3 from Teide Volcano, Tenerife, Canary Islands." Geophysical Research Letters 25, no. 17 (September 1, 1998): 3311–14. http://dx.doi.org/10.1029/98gl02561.

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25

Catalan, Leyre, Amaia Garacochea, Alvaro Casi, Miguel Araiz, Patricia Aranguren, and David Astrain. "Experimental Evidence of the Viability of Thermoelectric Generators to Power Volcanic Monitoring Stations." Sensors 20, no. 17 (August 27, 2020): 4839. http://dx.doi.org/10.3390/s20174839.

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Although there is an important lack of commercial thermoelectric applications mainly due to their low efficiency, there exist some cases in which thermoelectric generators are the best option thanks to their well-known advantages, such as reliability, lack of maintenance and scalability. In this sense, the present paper develops a novel thermoelectric application in order to supply power to volcanic monitoring stations, making them completely autonomous. These stations become indispensable in any volcano since they are able to predict eruptions. Nevertheless, they present energy supply difficulties due to the absence of power grid, the remote access, and the climatology. As a solution, this work has designed a new integral system composed of thermoelectric generators with high efficiency heat exchangers, and its associated electronics, developed thanks to Internet of Things (IoT) technologies. Thus, the heat emitted from volcanic fumaroles is transformed directly into electricity with thermoelectric generators with passive heat exchangers based on phase change, leading to a continuous generation without moving parts that powers different sensors, the information of which is emitted via LoRa. The viability of the solution has been demonstrated both at the laboratory and at a real volcano, Teide (Canary Islands, Spain), where a compact prototype has been installed in an 82 °C fumarole. The results obtained during more than eight months of operation prove the robustness and durability of the developed generator, which has been in operation without maintenance and under several kinds of meteorological conditions, leading to an average generation of 0.49 W and a continuous emission over more than 14 km.

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26

Catalan, Leyre, Miguel Araiz, Patricia Aranguren, German D. Padilla, Pedro A. Hernandez, Nemesio M. Perez, Celestino Garcia de la Noceda, Jose F. Albert, and David Astrain. "Prospects of Autonomous Volcanic Monitoring Stations: Experimental Investigation on Thermoelectric Generation from Fumaroles." Sensors 20, no. 12 (June 23, 2020): 3547. http://dx.doi.org/10.3390/s20123547.

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Fumaroles represent evidence of volcanic activity, emitting steam and volcanic gases at temperatures between 70 and 100 ∘ C . Due to the well-known advantages of thermoelectricity, such as reliability, reduced maintenance and scalability, the present paper studies the possibilities of thermoelectric generators, devices based on solid-state physics, to directly convert fumaroles heat into electricity due to the Seebeck effect. For this purpose, a thermoelectric generator composed of two bismuth-telluride thermoelectric modules and heat pipes as heat exchangers was installed, for the first time, at Teide volcano (Canary Islands, Spain), where fumaroles arise in the surface at 82 ∘ C . The installed thermoelectric generator has demonstrated the feasibility of the proposed solution, leading to a compact generator with no moving parts that produces a net generation between 0.32 and 0.33 W per module given a temperature difference between the heat reservoirs encompassed in the 69–86 ∘ C range. These results become interesting due to the possibilities of supplying power to the volcanic monitoring stations that measure the precursors of volcanic eruptions, making them completely autonomous. Nonetheless, in order to achieve this objective, corrosion prevention measures must be taken because the hydrogen sulfide contained in the fumaroles reacts with steam, forming sulfuric acid.

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27

Almendros, Javier, Jesús M. Ibáñez, Enrique Carmona, and Daria Zandomeneghi. "Array analyses of volcanic earthquakes and tremor recorded at Las Cañadas caldera (Tenerife Island, Spain) during the 2004 seismic activation of Teide volcano." Journal of Volcanology and Geothermal Research 160, no. 3-4 (February 2007): 285–99. http://dx.doi.org/10.1016/j.jvolgeores.2006.10.002.

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28

Quidelleur, X., P. Y. Gillot, V. Soler, and J. C. Lefèvre. "K/Ar dating extended into the last millennium: Application to the youngest effusive episode of the Teide Volcano (Spain)." Geophysical Research Letters 28, no. 16 (August 15, 2001): 3067–70. http://dx.doi.org/10.1029/2000gl012821.

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29

Pérez, Nemesio M., Pedro A. Hernández, Eleazar Padrón, Gladys Melián, Dácil Nolasco, José Barrancos, Germán Padilla, et al. "An increasing trend of diffuse CO2 emission from Teide volcano (Tenerife, Canary Islands): geochemical evidence of magma degassing episodes." Journal of the Geological Society 170, no. 4 (June 20, 2013): 585–92. http://dx.doi.org/10.1144/jgs2012-125.

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30

Martí, J., J. Mitjavila, and V. Araña. "Stratigraphy, structure and geochronology of the Las Cañadas caldera (Tenerife, Canary Islands)." Geological Magazine 131, no. 6 (November 1994): 715–27. http://dx.doi.org/10.1017/s0016756800012838.

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AbstractAfter a long period of subaerial fissure-fed extrusions of basaltic magmas (∼ 12 to > 3 Ma) volcanic activity was then concentrated in the central part of Tenerife. Phonolitic magma chambers formed and a central volcanic complex was constructed (the Las Canadas edifice). The formation of a large depression (the Las Canadas caldera) truncated the top of the edifice. The active twin strato-cones Teide—Pico Viejo are sited in this depression. The history of the Las Canadas caldera and edifice are established from stratigraphy, geochronology (K—Ar dates) and volcanological studies. Two different groups are recognized, separated by a major unconformity. The Lower Group is dated at 2 to 3 Ma and includes the products of several volcanic centres, which together represent several cycles. The Upper Group ranges from 1.56 to 0.17 Ma and includes three different formations representing three long-term (∼ 100 to 300 Ka) volcanic cycles. The periods of dormancy between each formation were of ∼ 120 to 250 Ka duration. The Las Canadas caldera is a multicyclic caldera which formed over the period 1.18–0.17 Ma. Each cycle of activity represented by a formation culminated in caldera collapse which affected different sectors of the Las Canadas edifice. Geological observation and geochronology support an origin by collapse into a magma chamber. The minimum volume of pyroclastic ejecta is substantially greater than the present caldera depression volume (45 km3), but approaches the inferred volume of the original caldera depression (> 140 km3). After the formation of the caldera, sector collapses could also occur at the northern flank of the volcano causing the disappearance of the northern side of the caldera wall.

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31

Chávez-García, Francisco J., Francisco Luzón, Dimitris Raptakis, and José Fernández. "Shear-wave Velocity Structure around Teide Volcano: Results Using Microtremors with the SPAC Method and Implications for Interpretation of Geodetic Results." Pure and Applied Geophysics 164, no. 4 (April 2007): 697–720. http://dx.doi.org/10.1007/s00024-007-0184-9.

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32

Almendros, Javier, Francisco Luz�n, and Antonio Posadas. "Microtremor Analyses at Teide Volcano (Canary Islands, Spain): Assessment of Natural Frequencies of Vibration Using Time-dependent Horizontal-to-vertical Spectral Ratios." Pure and Applied Geophysics 161, no. 7 (July 1, 2004): 1579–96. http://dx.doi.org/10.1007/s00024-004-2522-5.

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33

Melián, G., F. Tassi, N. Pérez, P. Hernández, F. Sortino, O. Vaselli, E. Padrón, et al. "A magmatic source for fumaroles and diffuse degassing from the summit crater of Teide Volcano (Tenerife, Canary Islands): a geochemical evidence for the 2004–2005 seismic–volcanic crisis." Bulletin of Volcanology 74, no. 6 (May 8, 2012): 1465–83. http://dx.doi.org/10.1007/s00445-012-0613-1.

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34

BRYAN, S. E., J. MARTÍ, and R. A. F. CAS. "Stratigraphy of the Bandas del Sur Formation: an extracaldera record of Quaternary phonolitic explosive eruptions from the Las Cañadas edifice, Tenerife (Canary Islands)." Geological Magazine 135, no. 5 (September 1998): 605–36. http://dx.doi.org/10.1017/s0016756897001258.

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Explosive volcanism has dominated the large phonolitic shield volcano of Tenerife, the Las Cañadas edifice, for the last 1.5 m.y. Pyroclastic deposits of the Bandas del Sur Formation are exposed along the southern flanks, and record the last two of at least three long-term cycles of caldera-forming explosive eruptions. Each cycle began with flank fissure eruptions of alkali basalt lava, followed by minor eruptions of basanite to phonotephrite lavas. Minor phonotephritic to phonolitic lava effusions also occurred on the flanks of the edifice during the latter stages of the second explosive cycle. Non-welded plinian fall deposits and ignimbrites are the dominant explosive products preserved on the southern flanks. Of these, a significant volume has been dispersed offshore. Many pyroclastic units of the second explosive cycle exhibit compositional zonation. Banded pumice occurs in most units of the third (youngest) explosive cycle, and ignimbrites typically contain mixed phenocryst assemblages, indicating the role of magma mixing/mingling prior to eruption. At least four major eruptions of the third cycle began with phreatomagmatic activity, producing lithic-poor, accretionary lapilli-bearing fallout and/or surge deposits. The repeated, brief phase of phreatomagmatism at the onset of these eruptions is interpreted as reflecting an exhaustive water supply, probably a small caldera lake that was periodically established during the third cycle. Accidental syenite becomes an increasingly important lithic clast type in ignimbrites up-sequence, and is interpreted as recording the progressive development of a plutonic complex beneath the summit caldera.Successive eruptions during each explosive cycle increased in volume, with the largest eruption occurring at the end of the cycle. More than ten major explosive eruptions vented moderately large volumes (1−[ges ]10 km3) of phonolitic magma during the last two cycles. Culminating each explosive cycle was the emplacement of relatively large volume (>5−10 km3) ignimbrites with coarse, vent-derived lithic breccias, interpreted to record a major phase of caldera collapse. In the extracaldera record, explosive cycles are separated by ∼0.2 m.y. periods of non-explosive activity. Repose periods were characterized by erosion, remobilization of pyroclastic deposits by discharge events, and pedogenesis. The current period of non-explosive activity is characterized by the construction of the Teide-Pico Viejo stratovolcanic complex within the summit caldera. This suggests that eruptive hiatuses in the extracaldera record may reflect effusive activity and stratovolcano or shield-building phases within the summit caldera. Alternating effusive and explosive cycles have thus been important in the volcanic evolution of the Las Cañadas edifice.

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35

Ortiz, R., V. Araña, M. Astiz, and A. Garcia. "Magnetotelluric study of the Teide (Tenerife) and Timanfaya (Tanzarote) volcanic areas." Journal of Volcanology and Geothermal Research 30, no. 3-4 (December 1986): 357–77. http://dx.doi.org/10.1016/0377-0273(86)90061-2.

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Albert-Beltrán, J. F., V. Araña, J. L. Diez, and A. Valentin. "Physical-chemical conditions of the Teide volcanic system (Tenerife, Canary Islands)." Journal of Volcanology and Geothermal Research 43, no. 1-4 (October 1990): 321–32. http://dx.doi.org/10.1016/0377-0273(90)90059-o.

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Pohánka, Vladimír, Peter Vajda, and Jaroslava Pánisová. "On inverting gravity changes with the harmonic inversion method: Teide (Tenerife) case study." Contributions to Geophysics and Geodesy 45, no. 2 (June 1, 2015): 111–34. http://dx.doi.org/10.1515/congeo-2015-0016.

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Abstract Here we investigate the applicability of the harmonic inversion method to time-lapse gravity changes observed in volcanic areas. We carry out our study on gravity changes occured over the period of 2004–2005 during the unrest of the Central Volcanic Complex on Tenerife, Canary Islands. The harmonic inversion method is unique in that it calculates the solution of the form of compact homogeneous source bodies via the mediating 3-harmonic function called quasigravitation. The latter is defined in the whole subsurface domain and it is a linear integral transformation of the surface gravity field. At the beginning the seeds of the future source bodies are introduced: these are quasi-spherical bodies located at the extrema of the quasigravitation (calculated from the input gravity data) and their differential densities are free parameters preselected by the interpreter. In the following automatic iterative process the source bodies change their size and shape according to the local values of quasigravitation (calculated in each iterative step from the residual surface gravity field); the process stops when the residual surface gravity field is sufficiently small. In the case of inverting temporal gravity changes, the source bodies represent the volumetric domains of temporal mass-density changes. The focus of the presented work is to investigate the dependence of the size and shape of the found source bodies on their differential densities. We do not aim here (yet) at interpreting the found solutions in terms of volcanic processes associated with intruding or rejuvenating magma and/or migrating volatiles.

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Criado Hernández, Constantino, Pedro Dorta, Héctor Casanova, Emilio González-Reimers, Matilde Arnay, and Vicente Soler. "Desencadenamiento de debris flow en el volcán Teide. ¿Un proceso creciente?" Cuaternario y Geomorfología 32, no. 3-4 (December 20, 2018): 23. http://dx.doi.org/10.17735/cyg.v32i3-4.67068.

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Ablay, G. J., M. R. Carroll, M. R. Palmer, J. Marti, and R. S. J. Sparks. "Basanite-Phonolite Lineages of the Teide-Pico Viejo Volcanic Complex, Tenerife, Canary Islands." Journal of Petrology 39, no. 5 (May 1, 1998): 905–36. http://dx.doi.org/10.1093/petroj/39.5.905.

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Martí, J., R. Sobradelo, A. Felpeto, and O. García. "Eruptive scenarios of phonolitic volcanism at Teide–Pico Viejo volcanic complex (Tenerife, Canary Islands)." Bulletin of Volcanology 74, no. 3 (November 30, 2011): 767–82. http://dx.doi.org/10.1007/s00445-011-0569-6.

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Ablay, G. J., and J. Martı́. "Stratigraphy, structure, and volcanic evolution of the Pico Teide–Pico Viejo formation, Tenerife, Canary Islands." Journal of Volcanology and Geothermal Research 103, no. 1-4 (December 2000): 175–208. http://dx.doi.org/10.1016/s0377-0273(00)00224-9.

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Martí, J., W. P. Aspinall, R. Sobradelo, A. Felpeto, A. Geyer, R. Ortiz, P. Baxter, et al. "A long-term volcanic hazard event tree for Teide-Pico Viejo stratovolcanoes (Tenerife, Canary Islands)." Journal of Volcanology and Geothermal Research 178, no. 3 (December 2008): 543–52. http://dx.doi.org/10.1016/j.jvolgeores.2008.09.023.

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García, Olaya, Silvina Guzmán, and Joan Martí. "Stratigraphic correlation of Holocene phonolitic explosive episodes of the Teide–Pico Viejo Volcanic Complex, Tenerife." Journal of the Geological Society 171, no. 3 (March 20, 2014): 375–87. http://dx.doi.org/10.1144/jgs2013-086.

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Dóniz Páez, Francisco Javier. "Rasgos geomorfológicos de los volcanes recientes de Montañas Negras en Santiago del Teide (isla de Tenerife)." Polígonos. Revista de Geografía, no. 10 (December 14, 2000): 155. http://dx.doi.org/10.18002/pol.v0i10.561.

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Del Pin, Enrico, Roberto Carniel, and Marta Tárraga. "Event recognition by detrended fluctuation analysis: An application to Teide–Pico Viejo volcanic complex, Tenerife, Spain." Chaos, Solitons & Fractals 36, no. 5 (June 2008): 1173–80. http://dx.doi.org/10.1016/j.chaos.2006.07.044.

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Triebold, Silke, Andreas Kronz, and Gerhard Wörner. "Anorthite-calibrated backscattered electron profiles, trace elements, and growth textures in feldspars from the Teide–Pico Viejo volcanic complex (Tenerife)." Journal of Volcanology and Geothermal Research 154, no. 1-2 (June 2006): 117–30. http://dx.doi.org/10.1016/j.jvolgeores.2005.09.023.

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del Potro, Rodrigo, and Marcel Hürlimann. "The decrease in the shear strength of volcanic materials with argillic hydrothermal alteration, insights from the summit region of Teide stratovolcano, Tenerife." Engineering Geology 104, no. 1-2 (February 2009): 135–43. http://dx.doi.org/10.1016/j.enggeo.2008.09.005.

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Boulesteix, Thomas, Anthony Hildenbrand, Pierre-Yves Gillot, and Vicente Soler. "Eruptive response of oceanic islands to giant landslides: New insights from the geomorphologic evolution of the Teide–Pico Viejo volcanic complex (Tenerife, Canary)." Geomorphology 138, no. 1 (February 2012): 61–73. http://dx.doi.org/10.1016/j.geomorph.2011.08.025.

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CIVILE, DARIO, EMANUELE LODOLO, MAURO CAFFAU, LUCA BARADELLO, and ZVI BEN-AVRAHAM. "Anatomy of a submerged archipelago in the Sicilian Channel (central Mediterranean Sea)." Geological Magazine 153, no. 1 (August 20, 2015): 160–78. http://dx.doi.org/10.1017/s0016756815000485.

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AbstractThe Sicilian Channel is a broad and shallow shelf which is geologically part of the African Plate. Its NW sector (the Adventure Plateau), where water depths rarely exceed 100 m, is punctuated by several kilometre-sized morphological highs. These elevations, formed by both sedimentary and volcanic rocks, emerged around middle Holocene time or earlier when they constituted a large archipelago. High-resolution single-channel and multichannel seismic reflection profiles, along with stratigraphic and lithological information derived from exploration wells and rock samplings, are analysed to derive the shallow and deep structural setting of these banks and identify their geological nature. The sedimentary banks (Talbot, Ante-Talbot, Panope, Nereo and Pantelleria Vecchia), presently located at water depths 8–40 m, are composed of Miocene rocks severely deformed by a late Miocene compressional phase which produced the external sector of the Sicilian–Maghrebian thrust belt. Tortonian-aged rock samples from the Pantelleria Vecchia Bank represent patch reefs that have mostly formed on structural highs. Sedimentary analogies suggest that other sedimentary banks of the Adventure Plateau may have the same origin. Galatea, Anfitrite and Tetide represent submarine volcanic edifices emplaced on major extensional faults formed during early Pliocene – Quaternary continental rifting of the Sicilian Channel. The present-day morphology of the banks is the result of repeated phases of subaerial exposure and drowning, especially since the Last Glacial Maximum.

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Carballo-Pérez, Jared, Norberto Marrero-Gordillo, Alberto Lacave-Hernández, and Matilde Arnay-de-la-Rosa. "Virtual skeletons and digital muscles: an experimental bioarchaeological approach to the pre-Hispanic production of millstones (Tenerife, Canary Islands)." Virtual Archaeology Review 14, no. 28 (August 22, 2022): 19–37. http://dx.doi.org/10.4995/var.2023.17781.

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Highlights: The combination of biomechanical analysis and open-access Kinovea software enables the study of musculoskeletal and articular wear of experimentally reproduced tasks. The repeated use of the right arm during indirect percussion and abrasion in lithic production could increase the changes in bone robusticity of specific muscle attachments observed in the osteoarchaeological record. Motion ranges and postural angles analysis can generate more accurate representations of "virtual humans" in their archaeological context. Abstract: Understanding the physical impact of ancient labours has become an important experimental bioarchaeology area. Complex motion capture systems and digital tools have been used in biomechanical analysis during the reproduction of manual tasks. However, these systems are costly, so the researchers have explored alternative digital solutions. Therefore, the open-access Kinovea software was checked to confirm its reliability in characterizing the physical loads associated with particular works of ancient times. In this case study, the authors have analyzed the central postural angles and muscle chains involved in the indigenous manufacturing process of rotary stone mills, in the high mountains of Tenerife. The study included a virtual motion capture analysis carried out during the different phases of the experimental reproduction of this process; it was defined from the archaeological record of the quarries-workshops of Las Cañadas del Teide National Park (Canary Islands, Spain) volcanic millstones. The results of this study have demonstrated the software's effectiveness to virtually analyze the significant differences in posture between work techniques, observing a predominance of the use of m. biceps brachii, the m. brachioradialis, and the elbow joint during the manufacture of stone mills. On the other hand, Kinovea also has excellent potential in virtual archaeology, giving users tools to generate the average postural angles. As a result, building "virtual skeletons" in more precise work postures has been possible. This may serve as the base element to create complete body representations in virtual environments.

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