Seismology: energy radiation from the Sumatra earthquake.
We determined the duration of high-frequency energy radiation from Indonesia's great Sumatra-Andaman earthquake (26 December 2004) to be about 500 seconds. This duration can be translated into a rupture length of about 1,200 km, which is more than twice as long as that inferred from body-wave analyses performed soon after the event. Our analysis was able rapidly to define the extent of rupture, thereby aiding the assessment of seismic hazard in the immediate future.
Ni
Sidao
S
School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China. sdni@ustc.edu.cn
Kanamori
Hiroo
H
Helmberger
Don
D