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| Titel |
Combined co-seismic effects of the 2010 Mw8.8 Maule, the 2014 Mw8.0 Iquique
and the 2015 Mw8.3 Illapel earthquakes in Chile |
| VerfasserIn |
Luyuan Huang, Bei Zhang, Huihong Chen, Wulin Qu, Huai Zhang, Yaolin Shi |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250123504
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| Publikation (Nr.) |
 EGU/EGU2016-2774.pdf |
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| Zusammenfassung |
| This paper examines the combined co-effects caused by three devastating earthquakes
with magnitudes larger than 8.0 in Chile (the 2010 Mw 8.8 Maule earthquake, the 2014
Mw 8.0
Iquique earthquake and the 2015 Mw 8.3 Illapel earthquake), with total ruptures
propagating nearly 2000 km along the Chile Andean megathrust fault zone. To
estimate the influences of these earthquakes on surrounding areas and the fracture
zone, we built a heterogeneous ellipsoid Earth model using the Finite Element
Method. The co-seismic displacements in both near field and far field and the stresses
change induced by each earthquake were investigated, and the combined co-seismic
effects of the three earthquakes were also calculated to estimate future earthquake
risk.
Results show that the horizontal co-seismic offsets of the 2010 Maule earthquake were
well consistent with observations in both near-field and far-field. The maximum total
displacement reached 10.5m due to the three earthquakes, with ∼6m induced by the 2015
Illapel earthquake. The magnitude of stress changes were ∼1.0-10.0 kPa, represent about 2-3
years of accumulation of tectonic compressive stress. Based on the distribution of changes of
Coulomb failure stress on faults, a large earthquake will likely occur in the seismic rupture
zone around the epicenter of the 1960 Mw9.6 earthquake, the overlap area that did not
rupture during the 2010 Mw8.8 and 2015 Mw 8.3 earthquakes and the seismogenic zone
between the locations of the 2014 Iquique earthquake and the 1995 Antofagasta earthquake. |
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