Korea (KOR)

Authors:

Assembled by GEM

Summary

The model covering the Korean Peninsula was assembled by GEM as a derivative of other models already included in the Mosaic. The model covers only tectonic seismicity.

Information about the OQ model versions and input files can be found on the Results and Dissemination page.

Interactive Viewer

The viewer below depicts the seismic sources and hazard results in terms of PGA for a return period of 475 years. Click on the menu in the upper right corner to select the layer.

viewer_legend

Tectonic overview

The Korean Peninsula is not particularly tectonically active, and has few if any well-studied crustal faults. However, faulting around the peninsula, both in China and the Sea of Japan, may produce some ground shaking in the peninsula.

Hazard Model

Seismic Source Characterisation

The seismic source model is a combination of area sources from the China national model modelling shallow seismicity in stable crust and subduction sources from the Japan model.

Ground Motion Characterisation

The ground motion characterisation is based on the reccommendations of Stewart et al. (2013), which suggests a set of GMPEs for each tectonic region type.

Active Shallow Crust Weight
ZhaoEtAl2006Asc 0.333
ChiouYoungs2014 0.334
AkkarEtAlRjb2014 0.333
Subduction Interface Weight
ZhaoEtAl2006SInter 0.333
AbrahamsonEtAl2015SInter 0.334
AtkinsonBoore2003SInter 0.333
Subduction IntraSlab Weight
ZhaoEtAl2006SSlab 0.333
AbrahamsonEtAl2015SSlab 0.334
AtkinsonBoore2003SSlab 0.333
Subduction Interface - North East Correction Weight
ZhaoEtAl2006SInter 0.333
AbrahamsonEtAl2015SInter 0.334
AtkinsonBoore2003SInter 0.333
Subduction IntraSlab - North East Correction Weight
ZhaoEtAl2006SSlab 0.333
AbrahamsonEtAl2015SSlab 0.334
AtkinsonBoore2003SSlab 0.333
Subduction Interface - South West Correction Weight
ZhaoEtAl2006SInter 0.333
AbrahamsonEtAl2015SInter 0.334
AtkinsonBoore2003SInter 0.333
Subduction IntraSlab - South West Correction Weight
ZhaoEtAl2006SSlab 0.333
AbrahamsonEtAl2015SSlab 0.334
AtkinsonBoore2003SSlab 0.333
Stable Weight
PezeshkEtAl2011NEHRPBC 0.5
AtkinsonBoore2006Modified2011 0.5

Results

Hazard curves were computed with the OQ engine for peak ground acceleration (PGA) and spectral acceleration (SA) at 0.2s, 0.5s, 1.0s, and 2s. The computation was performed on a grid of 6095 sites (spaced at approximately 10 km) with reference soil conditions corresponding to a shear wave velocity in the upper 30 meters (Vs30) of 760-800 m/s.

The hazard map for PGA corresponding to a 10% probability of exceedance in 50 years (475 year return period), can be seen using the interactive viewer. For a more comprehensive set of hazard and risk results, please see the GEM Visualization Tools.

References

Stewart, J. P., Douglas, J., Javanbarg, M., Bozorgnia, Y., Abrahamson, N. A., Boore, D. M., Camp- bell, K. W., Delavaud, E., Erdik, M., and Stafford, P. J., 2013. Selection of Ground Motion Prediction Equations for the Global Earthquake Model. Earthquake Spectra 31, 19–45. doi: 10.1193/013013EQS017M.