Source Processes of the March 2007 Singkarak Earthquakes Inferred from Teleseismic Data

A. Afnimar, Reiji Kobayashi, Danny Hilman Natawidjaja


The rupture processes of two sequentialearthquakes have been inverted from teleseismic data. The first event released a total seismic moment of 7.9×1018 Nm (Mw 6.5) and the slip distribution shows three asperities, 1.5 m at the shallowside, 0.7 m at the rightsouth-east deep side and 0.5 m atthe north-west deep side. The second event had one asperity with 1.7 m slip and released a seismic moment of 7.5×1018 Nm (Mw 6.5). In both cases, maximum slip occurred above the hypocenter which was responsible for the surface displacement pattern.


asperity; source process; shallow rupture; surface displacement; teleseismic data

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