Laterally Varying Crustal and Quaternary Fault-Zone Structures in the Seoul Metropolitan Area, South Korea, from a Joint Inversion Analysis Based on Dense Seismic Arrays

• DOI: 10.1785/0120210197
• Publication Date: 2022-06-07T17:23:43Z
• Authors: Jeongin Lee; Tae-Kyung Hong; Seongjun Park; Junhyung Lee; Dongchan Chung; Byeongwoo Kim
• Keywords: Discontinuity (linguistics)

ABSTRACT The crustal structure and Quaternary fault zone in the Seoul metropolitan area are investigated using a joint inversion that combines receiver functions with surface wave dispersion based on seismic data from densely deployed arrays. uncertainty inverted models is examined through set of synthetic experiments. Synthetic tests comparisons other methods verify observed features. Moho depths range between 28.7 32.8 km relatively shallow central area. VP/VS ratio varies 1.67 1.85. A Conrad discontinuity weak velocity increase present at depth ∼20 km. Low-velocity anomalies appear ∼3 6–11 along Chugaryeong junction Apparent shear contrasts across where earthquakes clustered. high-velocity block western lies runs Seoul. seismicity suggest may extend to 11 least.