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<p>On February 6, 2023, two major earthquakes occurred in succession along the East Anatolian Fault Zone (EAFZ) in Turkey, causing heavy casualties and property losses. In the same year, several strong earthquakes occurred near the EAFZ. In current paper, the strong ground motion records of magnitude 5 or above in 2023 near the EAFZ in Turkey are statistically collated to study the data distribution characteristics and some correlations between the strong ground motion records that may cause damage to engineering structures. The statistical results show that these records demonstrate the characteristics of large distribution range and long duration of strong ground motions. The larger the magnitude, the more likely the vertical component of ground motion is to appear, and the pulse period of pulse-like ground motion is also larger. With the grow of epicenter distance, the low-frequency content, the average period and the duration also increases. The pulse-like ground motion has an amplification effect on displacement spectrum, especially in the vicinity of pulse period <i>T</i><sub>p</sub>.</p>

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Characteristics investigation for 2023 earthquake sequence of East Anatolian Fault Zone in Turkey

  • 期刊论文

  • 发表日期：

    2025年1月2日

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  • Dengjia Fang,
  • Shengkui Di,
  • Weiyu Sun,
  • Yu Zhou

摘要

On February 6, 2023, two major earthquakes occurred in succession along the East Anatolian Fault Zone (EAFZ) in Turkey, causing heavy casualties and property losses. In the same year, several strong earthquakes occurred near the EAFZ. In current paper, the strong ground motion records of magnitude 5 or above in 2023 near the EAFZ in Turkey are statistically collated to study the data distribution characteristics and some correlations between the strong ground motion records that may cause damage to engineering structures. The statistical results show that these records demonstrate the characteristics of large distribution range and long duration of strong ground motions. The larger the magnitude, the more likely the vertical component of ground motion is to appear, and the pulse period of pulse-like ground motion is also larger. With the grow of epicenter distance, the low-frequency content, the average period and the duration also increases. The pulse-like ground motion has an amplification effect on displacement spectrum, especially in the vicinity of pulse period Tp.