Publication Date:
2022-05-26
Description:
Author Posting. © The Author(s), 2017. This is the author's version of the work. It is posted here under a nonexclusive, irrevocable, paid-up, worldwide license granted to WHOI. It is made available for personal use, not for redistribution. The definitive version was published in Tectonophysics 721 (2017): 143-150, doi:10.1016/j.tecto.2017.10.003.
Description:
The 2006 Mw 7.8 Java earthquake was a tsunami earthquake, exhibiting
frequency-dependent seismic radiation along strike. High-frequency global
back-projection results suggest two distinct rupture stages. The first stage
lasted ~65 s with a rupture speed of ~1.2 km/s, while the second stage
lasted from ~65 to 150 s with a rupture speed of ~2.7 km/s. High-frequency
radiators resolved with back-projection during the second stage spatially correlate with splay fault traces mapped from residual free-air gravity anomalies.
These splay faults also colocate with a major tsunami source associated with
the earthquake inferred from tsunami first-crest back-propagation simulation.
These correlations suggest that the splay faults may have been reactivated
during the Java earthquake, as has been proposed for other tsunamigenic
earthquakes, such as the 1944 Mw 8.1 Tonankai earthquake in the Nankai
Trough.
Description:
W.F. is currently supported by the Postdoctoral Scholar Program at the Woods Hole Oceanographic Institution, with funding provided by the Weston Howland Jr. Postdoctoral Scholarship.
Keywords:
Earthquake
;
Tsunami
;
Back-projection
;
Splay faults
;
Java
;
Seismology
Repository Name:
Woods Hole Open Access Server
Type:
Preprint
Permalink
