Stress‐Drop Variability of Shallow Earthquakes Extracted from a Global Database of Source Time Functions
- Courboulex, F.
- Vallée, M.
- Causse, M.
- Chounet, A.
DOIAbstract
International audienceWe use the new global database of source time functions (STFs) and focal mechanisms proposed by Vallée (2013) using the automatic SCARDEC method (Vallée et al., 2011) to constrain earthquake rupture duration and variability. This database has the advantage of being very consistent since all the events with moment magnitudes Mw>5.8 that have occurred during the last 20 years were reanalyzed with the same method and the same station configuration. We analyze 1754 shallow earthquakes (depth<35 km) and use high‐quality criteria for the STFs, which result in the selection of 660 events. Among these, 313 occurred on the subduction interface (SUB events) and 347 outside (NOT‐SUB events). We obtain that for a given magnitude,...
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