Eruptive scenarios of phonolitic volcanism at Teide–Pico Viejo volcanic complex (Tenerife, Canary Islands)

Martı́, Joan; Sobradelo, Rosa; Felpeto, A.; García, Olaya Dorado

doi:10.1007/s00445-011-0569-6

Cited by 33 publications

(32 citation statements)

References 49 publications

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“…Evidence comes from geophysical studies of the oceanic basement around and below the Canary Islands (Dash and Bosshard 1969;Bosshard and MacFarlane 1970;Verhoef et al 1991;Mezcua et al 1992;Roest et al 1992;Watts et al 1997;Mantovani et al 2007) and from dikes Martí et al (2012)]. We marked the higher-resolution area of Fig.…”

Section: Geological Introductionmentioning

confidence: 98%

3D Attenuation Tomography of the Volcanic Island of Tenerife (Canary Islands)

et al. 2015

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This paper shows a new multidisciplinary interpretation approach to the internal structure of Tenerife Island. The central core of this work is the determination of the three-dimensional attenuation structure of the region using P-waves and the coda normalization method. This study has been performed using 45,303 seismograms recorded at 85 seismic stations from an active experiment (air gun shots) conducted in January 2007. The interpretation of these new results is done combining the new images with previous studies performed in the area such as seismic velocity tomography, magnetic structure, magnetotelluric surveys or gravimetric models. Our new 3D images indicate the presence of seismic attenuation contrasts, with areas of high and low seismic attenuation patterns. High seismic attenuation zones are observed both in shallow and in deeper areas. The shallowest area of Las Cañadas caldera complex (1-3 km thick) is dominated by high attenuation behavior, and it is interpreted as the combined effect of sedimentary and volcanoclastic deposits, multifracture systems and the presence of shallow aquifers. At the same time, the deeper analyzed area, more than 8 km below sea level, is dominated by a high attenuation pattern, and it is interpreted as the consequence of the effect of hightemperature rocks in the crustal-mantle boundary. This interpretation is compatible and confirmed by previous models that indicate the presence of underplating magma in this region. On the contrary, some low attenuation bodies and structures have been identified at different depths. A deep low attenuation central body is interpreted as the original central structure associated with the early stage of Tenerife Island. At shallower depths, some low attenuation bodies are compatible with old intermediate magmatic chambers postulated by petrological studies. Finally, in the north of the island (La Orotava valley) we can interpret the low attenuation structure as the headwall of this valley, supporting the idea that Las Cañadas caldera and this valley resulted from two different destructive processes.

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Section: Geological Introductionmentioning

confidence: 98%

3D Attenuation Tomography of the Volcanic Island of Tenerife (Canary Islands)

et al. 2015

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“…Previous volcanic hazard studies conducted on the Canary Islands have not followed a systematic method. Most work to date has focused on Tenerife and Lanzarote (Gómez-Fernández, 1996;Araña et al, 2000;Felpeto et al, 2001Felpeto et al, , 2007Felpeto, 2002;Carracedo et al, 2004aCarracedo et al, , b, 2005Martí and Felpeto, 2010;Sobradelo and Martí, 2010;Martí et al, 2012;Bartolini et al, 2013), although other studies have been carried out on Gran Canaria (Rodríguez-González, 2009), El Hierro (Becerril et al, 2013) and one for the Canary Islands as a whole (Sobradelo et al, 2011).…”

Section: Becerril Et Al: Long-term Volcanic Hazard Assessment On mentioning

confidence: 99%

“…Similar approaches have been applied in volcanic areas such as Auckland, New Zealand (Bebbington and Cronin, 2011); Etna, Sicily ; and Tenerife, Spain (Martí et al, 2012); Perú (Sandri et al, 2014). Nevertheless, other procedures have also been applied in order to assess volcanic hazards in Campi Flegrei, Italy (Lirer et al, 2001); Furnas (São Miguel, Azores) Vesuvius in Italy (Chester et al, 2002); and Auckland, New Zealand (Sandri et al, 2012).…”

Section: Becerril Et Al: Long-term Volcanic Hazard Assessment On mentioning

confidence: 99%

“…Martí et al, 2012). In order to illustrate potential future eruptions on El Hierro, we simulated scenarios assuming the results obtained with HASSET and considering the most probable hazards (i.e.…”

Section: Eruptive Scenariosmentioning

confidence: 99%

“…Most of these studies are based on the use of simulation models and Geographical Information Systems (GIS) that allow volcanic hazards such as lava flows, PDCs and ash fallout to be modelled and visualised (Pareschi et al, 2000;Felpeto et al, 2007;Toyos et al, 2007;Crisci et al, 2008;Cappello et al, 2012;Martí et al, 2012;Alcorn et al, 2013).…”

Section: Becerril Et Al: Long-term Volcanic Hazard Assessment On mentioning

confidence: 99%

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Long-term volcanic hazard assessment on El Hierro (Canary Islands)

Becerril

Bartolini

Sobradelo

et al. 2014

Nat. Hazards Earth Syst. Sci.

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Abstract. Long-term hazard assessment, one of the bastions of risk-mitigation programs, is required for land-use planning and for developing emergency plans. To ensure quality and representative results, long-term volcanic hazard assessment requires several sequential steps to be completed, which include the compilation of geological and volcanological information, the characterisation of past eruptions, spatial and temporal probabilistic studies, and the simulation of different eruptive scenarios. Despite being a densely populated active volcanic region that receives millions of visitors per year, no systematic hazard assessment has ever been conducted on the Canary Islands. In this paper we focus our attention on El Hierro, the youngest of the Canary Islands and the most recently affected by an eruption. We analyse the past eruptive activity to determine the spatial and temporal probability, and likely style of a future eruption on the island, i.e. the where, when and how. By studying the past eruptive behaviour of the island and assuming that future eruptive patterns will be similar, we aim to identify the most likely volcanic scenarios and corresponding hazards, which include lava flows, pyroclastic fallout and pyroclastic density currents (PDCs). Finally, we estimate their probability of occurrence. The end result, through the combination of the most probable scenarios (lava flows, pyroclastic density currents and ashfall), is the first qualitative integrated volcanic hazard map of the island.

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Probabilistic E-tools for Hazard Assessment and Risk Management

Bartolini

Martı́

Sobradelo

et al. 2017

Advances in Volcanology

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The impact of a natural event can significantly affect human life and the environment. Although fascinating, a volcanic eruption creates similar or even greater problems than more frequent natural events due to its multi-hazard nature and the intensity and extent of its potential impact. It is possible to live near a volcanic area and take advantage of the benefits that volcanoes offer, but it is also important to be aware of the existing threats and to know how to minimise risks. In this chapter, we present an integrated approach using e-tools for assessing volcanic hazard and risk management. These tools have been especially designed to assess and manage volcanic risk, to evaluate longand short-term volcanic hazards, to conduct vulnerability analysis, and to assist decision-makers during the management of a volcanic crisis. The methodology proposed here can be implemented before an emergency in order to identify optimum mitigating actions and how these may have to be adapted as new information is obtained. These tools also allow us identifying the most appropriate probabilistic and statistical techniques for volcanological data analysis and treatment in the context of quantitative hazard and risk assessments. Understanding volcanic unrest, forecasting volcanic eruptions, and predicting the most probable scenarios, all imply a high degree of inherent uncertainty, which needs to be quantified and clearly explained when transmitting scientific information to decision-makers. Resumen El impacto de un evento natural puede afectar significativamente la vida humana y el medio ambiente. Aunque fascinante, una erupción volcánica

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Eruptive scenarios of phonolitic volcanism at Teide–Pico Viejo volcanic complex (Tenerife, Canary Islands)

Cited by 33 publications

References 49 publications

3D Attenuation Tomography of the Volcanic Island of Tenerife (Canary Islands)

3D Attenuation Tomography of the Volcanic Island of Tenerife (Canary Islands)

Long-term volcanic hazard assessment on El Hierro (Canary Islands)

Probabilistic E-tools for Hazard Assessment and Risk Management

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