Physics
Scientific paper
Nov 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007ep%26s...59.1149h&link_type=abstract
Earth, Planets and Space, Volume 59, p. 1149-1153.
Physics
1
Scientific paper
Sea surface height data obtained by satellite altimetry from Jason-1 and TOPEX/Poseidon were analyzed to explore the possibility of a seismic geoid change due to the 2004 Sumatra-Andaman earthquake. This analysis identified a weakly positive geoid change in a region between the trench and outer arc. A subsequent investigation of the characteristics of this coseismic geoid change based on the dislocation theory revealed that a positive peak should indicate the upper edge of the high-slipped area or asperity and that a negative peak is responsible for the lower edge of the earthquake fault. An attempt at modeling the difference in the sea level anomaly failed to explain the observation since a large scatter in the original dataset obstructed its confirmation.
Hamada Naoya
Hasegawa Yasumasa
Hayashi Yasuaki
Hirata Kazuto
Kuragano Tsurane
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