Are the frictional properties of creeping faults persistent? Evidence from rapid afterslip following the 2011 Tohoku-oki earthquake
Article first published online: 30 JUL 2013
©2013. American Geophysical Union. All Rights Reserved.
Geophysical Research Letters
Volume 40, Issue 14, pages 3613–3617, 28 July 2013
How to Cite
2013), Are the frictional properties of creeping faults persistent? Evidence from rapid afterslip following the 2011 Tohoku-oki earthquake, Geophys. Res. Lett., 40, 3613–3617, doi:10.1002/grl.50713., , , and (
- Issue published online: 22 AUG 2013
- Article first published online: 30 JUL 2013
- Accepted manuscript online: 3 JUL 2013 11:53AM EST
- Manuscript Revised: 1 JUL 2013
- Manuscript Accepted: 1 JUL 2013
- Manuscript Received: 22 MAY 2013
- fault frictional properties;
- the 2011 Tohoku-oki earthquake;
 Geophysical observations and numerical studies have shown that creeping portions of faults have persistent rate-strengthening frictional properties and can act as barriers to earthquake rupture propagation. On the basis of GPS data following the 2011 MW 9.0 Tohoku-oki earthquake in Japan, we find that the evolution of afterslip and postseismic shear stress on the plate interface is inconsistent with persistent rate-strengthening frictional properties but is consistent with slip-rate-dependent frictional properties that exhibit less rate-strengthening with increasing slip rate. Such slip-rate-dependent frictional properties tend to prevent creeping regions from acting as barriers to rupture propagation and therefore could be an important factor in determining the spatial extent of individual earthquakes.