The January 2010 Efpalio earthquake sequence in the western Corinth Gulf (Greece)
| Autor: | Jiří Zahradník, Anastasia Kiratzi, Jan Kostelecký, G-Akis Tselentis, Efthimios Sokos, František Gallovič, Jaromír Janský, A. Serpetsidaki, O. Novotny |
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| Přispěvatelé: | Patras Seismological Laboratory, University of Patras [Greece], Department of Geophysics, Faculty of Mathematics and Physics, Charles University [Prague] (CU), Geophysical Laboratory [ Thessaloniki], Aristotle University of Thessaloniki, Faculty of Civil Engineering, Department of mathematics, Czech Technical University in Prague (CTU) |
| Rok vydání: | 2012 |
| Předmět: |
Rion-Patras Fault
010504 meteorology & atmospheric sciences shallow-focus earthquakes Outcrop Trichonis Fault [SDU.STU]Sciences of the Universe [physics]/Earth Sciences seismo-tectonics Slip (materials science) Induced seismicity Fault (geology) 010502 geochemistry & geophysics 01 natural sciences seismic swarms Efpalio earthquake 2010 earthquakes active faults Aftershock 0105 earth and related environmental sciences Earth-Surface Processes East Mediterranean fault planes strike-slip faults Focal mechanism geography geography.geographical_feature_category Microseism Greece Corinth Gulf micro-seisms faults Ionian Sea aftershocks Europe Tectonics natural hazards Geophysics geologic hazards moment tensors normal faults Seismology Geology |
| Zdroj: | Tectonophysics Tectonophysics, Elsevier, 2012, 530-531, pp.299-309. ⟨10.1016/j.tecto.2012.01.005⟩ |
| ISSN: | 0040-1951 1879-3266 |
| DOI: | 10.1016/j.tecto.2012.01.005 |
| Popis: | International audience; The January 2010 Efpalio earthquake sequence provides some key elements to enhance our view on the western Corinth Gulf tectonics. The sequence lasted almost six months, and included two Mw>5 strong events, both exhibiting normal faulting along approximately E-W trending planes. This paper attempts to construct a unified seismotectonic model of the sequence jointly interpreting earthquake locations, moment-tensors and slip inversions in terms of the possible activated fault planes. Previous studies have connected the prevailing microseismic activity to a major low-angle, north-dipping structure under the Corinth Gulf and the Efpalio sequence favors such a general trend. Moreover, it clearly shows the significance of the shallow activity, so far less recognized, and possibly connected to the relatively steep faults outcropping on the northern coast. The first 18 January 2010 Mw>5 event had almost no on-fault aftershocks and most likely it occurred on a 55 degrees south-dipping nodal plane. The early off-fault aftershocks formed two clusters roughly E-W trending, both of which are connected with normal faulting. Cross-sections revealed that the northernmost cluster is connected with a north-dipping structure, where the second 22 January 2010 Mw>5 event occurred. In addition, the very shallow parts of the faults ( |
| Databáze: | OpenAIRE |
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