Duan, Y.; Bo, J.; Peng, D.; Li, Q.; Wan, W.; Qi, W. Analysis of Peak Ground Acceleration and Seismogenic Fault Characteristics of the Mw7.8 Earthquake in Turkey. Appl. Sci.2023, 13, 10896.
Duan, Y.; Bo, J.; Peng, D.; Li, Q.; Wan, W.; Qi, W. Analysis of Peak Ground Acceleration and Seismogenic Fault Characteristics of the Mw7.8 Earthquake in Turkey. Appl. Sci. 2023, 13, 10896.
Duan, Y.; Bo, J.; Peng, D.; Li, Q.; Wan, W.; Qi, W. Analysis of Peak Ground Acceleration and Seismogenic Fault Characteristics of the Mw7.8 Earthquake in Turkey. Appl. Sci.2023, 13, 10896.
Duan, Y.; Bo, J.; Peng, D.; Li, Q.; Wan, W.; Qi, W. Analysis of Peak Ground Acceleration and Seismogenic Fault Characteristics of the Mw7.8 Earthquake in Turkey. Appl. Sci. 2023, 13, 10896.
Abstract
A Mw7.8 earthquake struck Turkey on February 6, 2023, causing severe casualties and economic losses. This paper investigates the characteristics of strong ground motion and seismogenic fault of the earthquake. We collected and processed the strong ground motion records of 379 stations using Matlab, SeismoSignal and Surfer software, and obtained the peak ground acceleration (PGA) contour map. We analyzed the near-fault effect, the fault locking segment effect and the trampoline effect of the earthquake based on the spatial distribution of PGA, the fault geometry and slip distribution. We found that the earthquake generated a very strong ground motion concentration effect in the near-fault area, with the maximum PGA exceeding 2000cm/s2. However, the presence of fault locking segments influenced the spatial distribution of ground motion, resulting in four significant PGA high-value concentration areas at a local dislocation, a turning point and the end of the East Anatolian Fault. We also revealed for the first time the typical manifestation of the trampoline effect in this earthquake, which was characterized by a large vertical acceleration with the positive direction significantly larger than the negative direction. This paper provides an important reference for understanding the seismogenic mechanism, damage mode, characteristics and strong earthquake law of Turkey earthquake.
Environmental and Earth Sciences, Geophysics and Geology
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