Physics
Scientific paper
Oct 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998georl..25.3907i&link_type=abstract
Geophysical Research Letters, Volume 25, Issue 20, p. 3907-3910
Physics
3
Seismology: Earthquake Dynamics And Mechanics, Seismology: Instruments And Techniques, Physical Properties Of Rocks: Acoustic Properties
Scientific paper
It is known that there is a slow stage of precursory slip prior to a dynamic rupture propagation. Thus it is expected that there should be some physical contrasts between before and after the precursory slip. To detect the contrasts, we performed an observatory experiment in which P- and S-waves were transmitted across a fault in a double direct shear apparatus. Two types of experiments were made: first, Normal Stress Holding Test (NSHT), in which we focused on the effect of stationary contact time on transmission waves. Second, Shear Stress Increasing Test (SSIT), in which we measured local shear stresses in addition to transmission waves. In NSHT we observed increases in amplitude of transmission waves with the logarithm of stationary contact time. The change was several percent after about 3 hours contact. In SSIT we observed a significant increase in amplitude with a shear stress application until a stick-slip occurred. It may be explained by a strengthening of asperity interlocking. However, the detailed mechanism of this phenomenon is uncertain. Further we found a little reduction of increasing rate of amplitude which corresponds to the local precursory slips. This reduction may be attributed to the reset of stationary contact time due to local slips and replacement of asperity contacts with smaller contact sizes.
Iwasa Koji
Yoshioka Naoto
No associations
LandOfFree
An experimental trial to detect precursory slips by transmission waves across a fault 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 An experimental trial to detect precursory slips by transmission waves across a fault, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An experimental trial to detect precursory slips by transmission waves across a fault will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1096989