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Journal Articles Earth Planets and Space Year : 2022

Synchronization of small-scale seismic clusters reveals large-scale plate deformation

Abstract

It has long been observed that periods of intense seismic activity in a region alternate with periods of relative quiescence, but establishing whether or not this intermittency is driven by broad-scale physical processes occurring in the Earth, remains a challenge. Here, we address this question of long-range triggering by a large-scale analysis of evolution of the seismicity between 2003 and 2017 in the Anatolia region. Two multi-year periods of synchronous high seismicity rate in 27 seismicity clusters across the Anatolian plate are evidenced before a relatively uniform quiescence period. We argue that two remote tectonic processes are important for the timing of these activities: the 2004 M9.2 Sumatra earthquake and the 2008-2011 episode of slab rollback/deformation in the Hellenic subduction, even if a clear causal mechanism is still lacking.
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insu-03858149 , version 1 (17-11-2022)

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Hayrullah Karabulut, Michel Bouchon, Jean Schmittbuhl. Synchronization of small-scale seismic clusters reveals large-scale plate deformation. Earth Planets and Space, 2022, 74, ⟨10.1186/s40623-022-01725-z⟩. ⟨insu-03858149⟩
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