Evidence for azimuthal and temporal variations of the rupture propagation of the 1999 Chi-Chi, Taiwan earthquake from dense seismic array observations

Details Evidence for azimuthal and temporal variations of the rupture propagation of the 1999 Chi-Chi, Taiwan earthquake from dense seismic array observations Evidence for azimuthal and temporal variations of the rupture propagation of the 1999 Chi-Chi, Taiwan earthquake from dense seismic array observations

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.3377h&link_type=abstract

Geophysical Research Letters, Volume 28, Issue 17, p. 3377-3380

Other

7

Seismology, Seismology: Body Wave Propagation, Seismology: Earthquake Dynamics And Mechanics, Seismology: Earthquake Parameters

Scientific paper

Data recorded by the SMART-2 array and its nearby accelerometers in eastern Taiwan were used to make direct measurements of the rupture propagation of the 1999, Mw=7.6 Chi-Chi, Taiwan earthquake. The N-th root stack method was employed to window and stack seismic waveforms, and it revealed that coherent seismic energy showed clear temporal changes with regard to azimuth. The results of this study elicited unambiguous observations as to rupture propagation direction, rupture duration time and spatial distribution of the major asperities on the fault plane. The rupture propagation of the Chi-Chi earthquake was reconstructed and demonstrated that the source of the early arrived coherent energy was close to the epicenter and that the subsequent major energy moved southward. Twelve seconds after the initial rupture, clear arrival energy was resolved and then propagated northward. The horizontal apparent rupture velocity is estimated at 2.1 km/sec for its northward propagation. The largest source of radiated energy was identified and its location was near the northern end of the earthquake fault. The strong shaking was continuous for about 24 seconds. The analyzed results of this study provide direct observations of the rupture properties of this earthquake. These properties may serve as valuable constraints for other Chi-Chi earthquake rupture propagation studies based on other indirect measurement methods.

Affiliated with

Also associated with

No associations

Rating

Evidence for azimuthal and temporal variations of the rupture propagation of the 1999 Chi-Chi, Taiwan earthquake from dense seismic array observations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Evidence for azimuthal and temporal variations of the rupture propagation of the 1999 Chi-Chi, Taiwan earthquake from dense seismic array observations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evidence for azimuthal and temporal variations of the rupture propagation of the 1999 Chi-Chi, Taiwan earthquake from dense seismic array observations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1490317