Premium
Frictional melting can terminate seismic slips: Experimental results of stick‐slips
Author(s) -
Koizumi Yosuke,
Otsuki Kenshiro,
Takeuchi Akihiro,
Nagahama Hiroyuki
Publication year - 2004
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2004gl020642
Subject(s) - slip (aerodynamics) , resistive touchscreen , geology , coefficient of friction , drop (telecommunication) , displacement (psychology) , mechanics , materials science , geotechnical engineering , seismology , composite material , engineering , physics , mechanical engineering , electrical engineering , thermodynamics , psychology , psychotherapist
The appropriate setting of sensors and the use of a high speed data acquisition system enabled us to detect the exact time of melting of the slip surfaces during a stick‐slip event (fault displacement of 0.32 mm, stress drop of 230 MPa, rise time of 23 μs and maximum slip velocity of 40 m/s) in triaxial apparatus at 150 MPa confining pressure. Once slip started, the friction coefficient decreased continuously from 0.55 to 0.3, after which the frictional resistance recovered promptly and remarkably. This strengthening can be attributed to the highly resistive initial melt, a potential mechanism for arresting seismic slips.