Evidence for inner core super-rotation from time-dependent differential PKP traveltimes observed at Beijing Seismic Network

Details Evidence for inner core super-rotation from time-dependent differential PKP traveltimes observed at Beijing Seismic Network Evidence for inner core super-rotation from time-dependent differential PKP traveltimes observed at Beijing Seismic Network

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003geoji.152..509x&link_type=abstract

Geophysical Journal International, Volume 152, Issue 3, pp. 509-514.

Astronomy and Astrophysics

Astronomy

5

Beijing Seismic Network, Inner Core Rotation, Pkp

Scientific paper

In an effort to confirm and constrain inner core rotation, we examine earthquakes from the South Sandwich Islands recorded at the Beijing Seismic Network. We obtained a total of 109 high-quality measurements of PKP(BC)-PKP(DF) differential traveltimes by waveform cross-correlations from earthquakes spanning over 30 years. The results show robust temporal changes in PKP(BC)-PKP(DF) residuals along this pathway, providing new support for the differential inner core hypothesis. We also observed evidence for a lateral velocity gradient in this part of the inner core. Assuming that the temporal changes result from a shift of a lateral structure due to an inner core rotation, we estimate the inner core rotation rate to be about 0.41 +/- 0.12° yr-1 faster than the mantle.

Affiliated with

Also associated with

No associations

Rating

Evidence for inner core super-rotation from time-dependent differential PKP traveltimes observed at Beijing Seismic Network 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 inner core super-rotation from time-dependent differential PKP traveltimes observed at Beijing Seismic Network, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evidence for inner core super-rotation from time-dependent differential PKP traveltimes observed at Beijing Seismic Network will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-997436