High-frequency seismic radiation from Maule earthquake (M-w 8.8, 2010 February 27) inferred from high-resolution backprojection analysis
- We track a bilateral rupture propagation lasting similar to 160 s, with its dominant branch rupturing northeastwards at about 3 kms(-1). The area of maximum energy emission is offset from the maximum coseismic slip but matches the zone where most plate interface aftershocks occur. Along dip, energy is preferentially released from two disconnected interface belts, and a distinct jump from the shallower belt to the deeper one is visible after about 20 s from the onset. However, both belts keep on being active until the end of the rupture. These belts approximately match the position of the interface aftershocks, which are split into two clusters of events at different depths, thus suggesting the existence of a repeated transition from stick-slip to creeping frictional regime.
| Author details: | Mauro Palo, Frederik TilmannORCiD, Frank KrügerGND, Lutz Ehlert, Dietrich LangeORCiDGND |
|---|---|
| DOI: | https://doi.org/10.1093/gji/ggu311 |
| ISSN: | 0956-540X |
| ISSN: | 1365-246X |
| Title of parent work (English): | Geophysical journal international |
| Publisher: | Oxford Univ. Press |
| Place of publishing: | Oxford |
| Publication type: | Article |
| Language: | English |
| Year of first publication: | 2014 |
| Publication year: | 2014 |
| Release date: | 2017/03/27 |
| Tag: | Earthquake source observations; Subduction zone processes; Wave propagation |
| Volume: | 199 |
| Issue: | 2 |
| Number of pages: | 20 |
| First page: | 1058 |
| Last Page: | 1077 |
| Funding institution: | German Research Foundation (DFG) [TI 316/1-1] |
| Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Geowissenschaften |
| Peer review: | Referiert |
| Institution name at the time of the publication: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Erd- und Umweltwissenschaften |
