An Analysis of Probabilistic Seismic Hazard in the Korean Peninsula

Kyung, Jai-Bok; Kim, Min-Ju; Lee, Sang-Jun; Kim, Junkyung

doi:10.5467/jkess.2016.37.1.52

Cited by 11 publications

(4 citation statements)

References 13 publications

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“…The crustal provinces of Korea described above have often been considered as seismotectonic provinces, although until recently, seismic activity and current crustal deformation were not taken into consideration when describing the tectonics of the region (Kyung & Lee, ; Lee & Jung, ; Lee & Kim, ; Rhee et al, ). Hong et al () suggested an improved model of seismotectonic provinces in South Korea based on integrated geological, geophysical, and tectonic data, with the resultant zonation of seismotectonic provinces differing from traditional models.…”

Section: Geological Backgroundmentioning

confidence: 99%

Crustal Deformation of South Korea After the Tohoku‐Oki Earthquake: Deformation Heterogeneity and Seismic Activity

et al. 2018

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Although the 2011 Tohoku-Oki earthquake (Mw 9.0, 11 March 2011) occurred more than 1,000 km from South Korea, it significantly changed the magnitudes and orientations of Global Positioning System (GPS) velocity vectors in the country, which took two years to return to preearthquake values. Then, areas with relatively thick crust show contractional surface deformation, whereas areas with thinner crust show dilatation, suggesting that the deformation pattern is long-term. Although there is no one-to-one correlation between earthquakes and surface deformation, earthquakes tend to be concentrated in areas with higher shear strain rates. In South Korea, the stress field inferred from earthquake data is inconsistent with surface deformation calculated from GPS data. This may arise because stress orientations at earthquake focal depths are different from those at the surface, or surface deformation measured by GPS may represent interseismic elastic deformation leading to future large earthquakes, while recent earthquakes without surface ruptures might not contribute to the surface deformation. Some effects of crustal thickness on surface deformation and inconsistency between surface deformation from GPS data and kinematics from earthquake data may be a common feature of intraplate regions. Plain Language Summary This paper deals with surface deformation of South Korea after the 2011Tohoku-Oki earthquake (earthquake magnitude = 9.0), using Global Positioning System (GPS) data. By analyzing the relationship between deformation of crust and earthquake activity, we conclude that earthquakes in South Korea occur most commonly in areas with higher strain rates. We also show that the effects of the 2011 Tohoku-Oki earthquake on the Korean Peninsula lasted for two years after the earthquake.

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Section: Geological Backgroundmentioning

confidence: 99%

Crustal Deformation of South Korea After the Tohoku‐Oki Earthquake: Deformation Heterogeneity and Seismic Activity

et al. 2018

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“…As most earthquakes are known to occur along active faults, we utilized an active fault map. However, detailed information on active faults and fault displacement in South Korea is not su ciently available (NEMA 2012; Kyung et al 2016). In addition, the range of fault rupture associated with the extent of earthquake damage is highly dependent on fault length.…”

Section: Fault-line Density Mapmentioning

confidence: 99%

Comprehensive seismic risk assessment map of South Korea developed using seismic, geotechnical, and social vulnerability indicators

Lee

2021

Preprint

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At present, because it is not possible to predict earthquakes, disaster preparedness is vital for the reduction of damages. The awareness about earthquakes has substantially increased after the occurrence of two >M L 5 events in 2016 and 2017 in South Korea. This study presents the seismic risk assessment conducted for the entire country of South Korea. This assessment was performed using seismic, geotechnical, and social vulnerability indicators. The seismic vulnerability indicator was estimated using a probabilistic seismic hazard and fault-line density map that are directly related to the occurrence of earthquakes. The geotechnical vulnerability indicator was derived using bedrock depth data and extrapolation of digital elevation model data through geostatistical techniques. The seismic and geotechnical indicators were integrated based on the bedrock depth distribution. The social vulnerability indicator considered the distribution of relevant parameters such as vulnerable people, old houses, and road information. These statistical data without spatial continuity were incorporated into a map using principal component analysis. A five-grade classification of risks presented by the seismic and geotechnical vulnerability map and the social vulnerability index map was developed to facilitate simultaneous assessment. A risk matrix was applied to the two maps to produce a comprehensive seismic risk assessment map of South Korea, in which the southeastern and northwestern regions of South Korea present a high seismic risk. The results of this study will serve toward seismic risk management and minimize seismic disaster damages in South Korea.

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“…Some countries in Asia and the USA have quantitatively analyzed their vulnerability to earthquake disasters, developed probabilistic earth-quake hazard maps to prepare for such disasters, and periodically update them based on new methodologies [8,9]. Japan's Headquarters for Earthquake Research Promotion update the National Earthquake Hazard Chart through continuous research and the addition of new data [10]. In the case of Korea, the Earthquake Disaster Countermeasures Act was enacted in 2008, and a national earthquake risk map was drawn up as part of seismic countermeasures.…”

Section: Introductionmentioning

confidence: 99%

Development of Vulnerability Evaluation Technology for Environmental Facilities Focused on the Water Treatment Systems in South Korea

et al. 2023

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This study developed a vulnerability evaluation framework for earthquake and flood disasters targeting water treatment facilities. The vulnerability evaluation framework of a water treatment facility determines vulnerability evaluation factors such as exposure, sensitivity, and adaptive capacity in consideration of the characteristics of an environmental facility. At this time, vulnerability evaluation items are derived in consideration of topography, natural environment, hydraulic, structural, and non-structural characteristics by analyzing the facility. The vulnerability evaluation items consist of 24 for earthquake disasters, and for the flood disaster derived 20 indicators. Then the final vulnerability of disaster is determined by considering the impact of each item. To verify the vulnerability evaluation framework proposed in this study, the technology was applied to a real water treatment facility in Korea. The proposed technique would be able to make a plan to prevent natural disasters damage and minimize such damage to the environmental facility.

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An Analysis of Probabilistic Seismic Hazard in the Korean Peninsula

Cited by 11 publications

References 13 publications

Crustal Deformation of South Korea After the Tohoku‐Oki Earthquake: Deformation Heterogeneity and Seismic Activity

Crustal Deformation of South Korea After the Tohoku‐Oki Earthquake: Deformation Heterogeneity and Seismic Activity

Comprehensive seismic risk assessment map of South Korea developed using seismic, geotechnical, and social vulnerability indicators

Development of Vulnerability Evaluation Technology for Environmental Facilities Focused on the Water Treatment Systems in South Korea

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