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| Titel |
Seismic response of paleo-tectonic structures to ambient stress field and great earthquake |
| VerfasserIn |
Tae-Kyung Hong, Soung Eil Houng, Mohammad Tahir |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250075738
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| Zusammenfassung |
| The Korean Peninsula is located in the far-eastern
Eurasia plate, and experienced complex tectonic
evolutions including continental collision and rifting.
The paleo-rifting is responsible for the separation of
Japanese islands from the Eurasian plate. Also, the
paleo-continental collisions formed a current shape of
Korean Peninsula. It was observed that the plaeo tectonic
structures associated with the paleo-rifting and
paleo-collision are spatially correlated with high
seismicity regions. Historically dozens of devastating
earthquakes with magnitudes greater than 6 appear to
occur in the regions. Thrustal earthquakes occur
primarily in the paleo-rifting zone, and normal-faulting
earthquakes occur dominantly in the paleo-collision zone,
as a result of response of paleo-structures to the
ambient stress field. The ambient compressional stress
field causes reverse activation of the paleo-rifting
structures. Similarly conjugate tensional stress field
activate normal faulting in paleo-collision structures.
In addition, it was observed that the paleo-tectonic
structures respond to the M9.0 2011 Tohoku-Oki
earthquake, and seismicity has been increased after the
earthquake. We investigate the seismotectonics from
geological features, seismicity, fault-plane solutions
and seismic tomography. Also, we discuss the influence of
the 2011 Tohoku-Oki earthquake on the seismicity in the
Korean Peninsula. |
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