Rupture features of the 2010 Mw 8.8 Chile earthquake extracted from surface waves

CCUR > College of Natural Science and Engineering > College of Science > Department of Geology > journal articles > Item 987654321/35976

Please use this identifier to cite or link to this item: https://irlib.pccu.edu.tw/handle/987654321/35976

Title:	Rupture features of the 2010 Mw 8.8 Chile earthquake extracted from surface waves
Authors:	Huang, YL (Huang, Yi-Ling) Hwang, RD (Hwang, Ruey-Der) Jhuang, YS (Jhuang, Yi-Shan) Lin, CY (Lin, Cai-Yi)
Contributors:	地質系
Keywords:	2010 Chile earthquake Rupture velocity Rise time Static stress drop
Date:	2017-03
Issue Date:	2017-04-19 15:24:57 (UTC+8)
Abstract:	This study used the rupture directivity theory to derive the fault parameters of the 2010 Mw 8.8 Chile earthquake on the basis of the azimuth-dependent source duration obtained from the Rayleigh-wave phase velocity. Results revealed that the 2010 Chile earthquake featured asymmetric bilateral faulting. The two rupture directions were N171 degrees E (northward) and N17 degrees E (southward), with rupture lengths of approximately 313 and 118 km, respectively, and were related to the locking degree in the source region. The entire source duration was approximately 187 s. After excluding the rise time from the source duration, the northward rupture velocity was approximately 2.02 km/s, faster than the southward rupture velocity (1.74 km/s). On average, the rupture velocity derived from this study was slower than that estimated from finite-fault inversion; however, several historical earthquakes in the Chile region also showed slow rupture velocity when using low-frequency signals, as surface waves do. Two earlier studies through global-positioning-system data analysis showed that the static stress drop of 50-70 bars for the 2010 Chile earthquake was higher than that for subduction-zone earthquakes. Hence, a remarkable feature was that the 2010 Chile earthquake had a slow rupture velocity and a high static stress drop, which suggested an inverse relationship between rupture velocity and static stress drop.
Relation:	EARTH PLANETS AND SPACE 卷: 69 文獻號碼: 41
Appears in Collections:	[Department of Geology] journal articles

Files in This Item:

File	Description	Size	Format
index.html		0Kb	HTML	367	View/Open

View Licence

Loading...