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Stress barriers con...
Stress barriers controlling lateral migration of magma revealed by seismic tomography
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- Marti, J. (författare)
- CSIC, Inst Earth Sci Jaume Almera, ICTJA, Barcelona, Spain.
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- Villasenor, A. (författare)
- CSIC, Inst Earth Sci Jaume Almera, ICTJA, Barcelona, Spain.
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- Geyer, A. (författare)
- CSIC, Inst Earth Sci Jaume Almera, ICTJA, Barcelona, Spain.
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- Lopez, C. (författare)
- IGN, Observ Geofis Cent, Madrid, Spain.
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- Tryggvason, Ari (författare)
- Uppsala universitet,Geofysik
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CSIC, Inst Earth Sci Jaume Almera, ICTJA, Barcelona, Spain IGN, Observ Geofis Cent, Madrid, Spain. (creator_code:org_t)
- 2017-01-13
- 2017
- Engelska.
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Ingår i: Scientific Reports. - : Springer Science and Business Media LLC. - 2045-2322. ; 7
- Relaterad länk:
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https://uu.diva-port... (primary) (Raw object)
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Understanding how monogenetic volcanic systems work requires full comprehension of the local and regional stresses that govern magma migration inside them and why/how they seem to change from one eruption to another. During the 2011-2012 El Hierro eruption (Canary Islands) the characteristics of unrest, including a continuous change in the location of seismicity, made the location of the future vent unpredictable, so short term hazard assessment was highly imprecise. A 3D P-wave velocity model is obtained using arrival times of the earthquakes occurred during that pre-eruptive unrest and several latter post-eruptive seismic crises not related to further eruptions. This model reveals the rheological and structural complexity of the interior of El Hierro volcanic island. It shows a number of stress barriers corresponding to regional tectonic structures and blocked pathways from previous eruptions, which controlled ascent and lateral migration of magma and, together with the existence of N-S regional compression, reduced its options to find a suitable path to reach the surface and erupt.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geofysik (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geophysics (hsv//eng)
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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