Tracking the rupture of the Mw = 9.3 Sumatra earthquake over 1,150 km at teleseismic distance

Frank Krüger () and Matthias Ohrnberger
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Frank Krüger: University of Potsdam
Matthias Ohrnberger: University of Potsdam

Nature, 2005, vol. 435, issue 7044, 937-939

Abstract: Distant signals from Sumatra Two studies published this week view the earthquake that caused the devastating Indian Ocean tsunami of last December from a distance. Data from Japan's Hi-Net seismic array show that the rupture propagated in one direction, taking 8 minutes to travel 1,300 km north at 2.8 km per second. The calculations are based on the first seismic waves to reach the array; this monitoring system could in future be used to profile large earthquakes within minutes of their occurrence. Data from the German Regional Seismic Network, 9,000 km from the event, suggest that the rupture propagated at between 2.4 and 2.8 km per second initially, before slowing as it turned north.

Date: 2005
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DOI: 10.1038/nature03696

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