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Journal Articles Science Year : 2008

Extending Earthquakes' Reach Through Cascading.


Earthquakes, whatever their size, can trigger other earthquakes. Mainshocks cause aftershocks to occur, which in turn activate their own local aftershock sequences, resulting in a cascade of triggering that extends the reach of the initial mainshock. A long-lasting difficulty is to determine which earthquakes are connected, either directly or indirectly. Here we show that this causal structure can be found probabilistically, with no a priori model nor parameterization. Large regional earthquakes are found to have a short direct influence in comparison to the overall aftershock sequence duration. Relative to these large mainshocks, small earthquakes collectively have a greater effect on triggering. Hence, cascade triggering is a key component in earthquake interactions.
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Dates and versions

insu-00334983 , version 1 (28-10-2008)



David Marsan, O. Lengline. Extending Earthquakes' Reach Through Cascading.. Science, 2008, 319 (5866), pp.1076 à 1079. ⟨10.1126/science.1148783⟩. ⟨insu-00334983⟩
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