Back to Search
Start Over
Shallow intraplate seismicity related to the Illapel 2015 Mw 8.4 earthquake: Implications from the seismic source
- Source :
- Tectonophysics. 766:205-218
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- The September 16, 2015, Mw 8.4 Illapel, Chile earthquake is the first large event occurring in north-central Chile after the 1943 earthquake, filling a known seismic gap in the region. The earthquake took place in a complex tectonic region, nearby an area where transition from erosive to accretionary margin occurs due to the collision of Juan Fernandez Ridge (JFR) along the Chilean margin. We inverted the kinematic rupture process of the 2015 Mw 8.4 Illapel earthquake from the joint inversion of teleseismic body waves and near-field data. The relative weighting between datasets and the weighting of spatial/temporal constraints are objectively estimated by applying the Akaike's Bayesian Information Criterion. The coseismic slip model yields a total seismic moment of 4.92 × 1021 Nm occurred over ~120 s. The rupture shows both downdip and updip propagation with slip extending along the thrust interface from ~50 km depth to shallow near-trench depths (
- Subjects :
- Seismic gap
010504 meteorology & atmospheric sciences
Subduction
Inversion (geology)
Slip (materials science)
Induced seismicity
010502 geochemistry & geophysics
01 natural sciences
Tectonics
Geophysics
Intraplate earthquake
Seismic moment
Geology
Seismology
0105 earth and related environmental sciences
Earth-Surface Processes
Subjects
Details
- ISSN :
- 00401951
- Volume :
- 766
- Database :
- OpenAIRE
- Journal :
- Tectonophysics
- Accession number :
- edsair.doi...........b14a4ecd2c080600fae3ed04d03401c6