Show simple item record

dc.contributor.authorWang, Lifeng
dc.contributor.authorHainzl, Sebastian
dc.contributor.authorMai, Paul Martin
dc.date.accessioned2018-09-26T13:28:21Z
dc.date.available2018-09-26T13:28:21Z
dc.date.issued2017-08-03
dc.identifier.citationWang L, Hainzl S, Mai PM (2017) To which level did the 2010 M 8.8 Maule earthquake fill the pre-existing seismic gap? Geophysical Journal International 211: 498–511. Available: http://dx.doi.org/10.1093/gji/ggx304.
dc.identifier.issn0956-540X
dc.identifier.issn1365-246X
dc.identifier.doi10.1093/gji/ggx304
dc.identifier.urihttp://hdl.handle.net/10754/628772
dc.description.abstractThere is a long-standing debate whether or not the 2010 M 8.8 Maule earthquake filled a pre-existing seismic gap in which no large earthquake occurred for about 200 yr. Utilizing the inversion approach of Wang et al. that considers elastic strain accumulation and strain release during the earthquake cycle and includes the fault-coupling state as prior information in coseismic slip modelling, we investigate the inter- and coseismic slip balance for the 2010 M 8.8 Maule earthquake. The coseismic slip model is obtained as the product of three components: the interseismic backslip rate, the strain accumulation time, and the fraction of coseismically released slip potency (the product of slip and slip area) that may either fully or partially release the local strain. We construct slip models using the Slab1.0 fault geometry, and constrain the strain accumulation time for the 2010 Maule earthquake based on historical large earthquakes in the region. The results demonstrate that two slip clusters (north and south of the hypocentre) are required to model the geodetically measured coseismic displacements. The slip patch south of the hypocentre is located in a strongly coupled zone, and possibly released the local strain completely. The slip area north of the hypocentre overlaps with the interseismically creeping zone in which strain buildup may be low. The northern slip patch released higher slip potency than accumulated since the last mega-event in 1751, suggesting a possible dynamic overshoot during coseismic rupture (under the assumption that the last major earthquake has reset the regional strain). Alternatively, the last big event may not have fully released the strain in this region. Our study reveals that the Maule earthquake, combing its coseismic and post-seismic slip over 1.3 yr, released ~67-72 per cent of the local strain. Remaining strain is concentrated mainly south of the hypocentre, with potency equivalent to an M 8.4 event considering strain accumulation for 259 yr (since 1751).
dc.description.sponsorshipWe thank Gavin Hayes and another anonymous reviewer for their constructive, profound and detailed comments that greatly improve ourwork. This researchwas supported byNSFC-41674067, projects of State Key Laboratory of Earthquake Dynamics LED2015A02 and LED2016A05, and also partially supported by King Abdullah University of Science and Technology (KAUST) in Thuwal, Saudi Arabia, grant BAS/1/1339-01-01.
dc.publisherOxford University Press (OUP)
dc.relation.urlhttps://academic.oup.com/gji/article/211/1/498/4062156
dc.rightsThis is a pre-copyedited, author-produced PDF of an article accepted for publication in Geophysical Journal International following peer review. The version of record is available online at: https://academic.oup.com/gji/article/211/1/498/4062156.
dc.subjectSeismicity and tectonics
dc.subjectSubduction zone processes
dc.titleTo which level did the 2010 M 8.8 Maule earthquake fill the pre-existing seismic gap?
dc.typeArticle
dc.contributor.departmentComputational Earthquake Seismology (CES) Research Group
dc.contributor.departmentEarth Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalGeophysical Journal International
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionState Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing 100029, China.
dc.contributor.institutionDeutsches GeoForschungsZentrum GFZ, Potsdam D-14473, Germany
kaust.personMai, Paul Martin
kaust.grant.numberBAS/1/1339-01-01
refterms.dateFOA2018-09-27T08:03:59Z
dc.date.published-online2017-08-03
dc.date.published-print2017-10-01


Files in this item

Thumbnail
Name:
ggx304.pdf
Size:
10.88Mb
Format:
PDF
Description:
Published version
Thumbnail
Name:
ggx304_Supp.zip
Size:
716.7Kb
Format:
application/zip
Description:
Supplemental files

This item appears in the following Collection(s)

Show simple item record