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<p>On January 1, 2024, a Mw 7.5 thrust earthquake (named the Noto earthquake) occurred on the Noto Peninsula of eastern Japan; the epicenter was located at 37.498° N and 137.242° E, and the focal depth was 16&#xa0;km. On the basis of high-resolution satellite images and topographic, geological, and seismological data, the spatial and size distributions of the coseismic landslides triggered by this earthquake and their controlling factors are evaluated. The results indicate that the 2024 Noto earthquake triggered at least 3134 landslides within an affected area of 1794 km<sup>2</sup> and that the highest concentration was 62 landslides/km<sup>2</sup>. The total landslide area and volume were 9.63 km<sup>2</sup> and 24.7 million m<sup>3</sup>, respectively. More landslides were concentrated in the northern section of the Noto Peninsula, especially when the coseismic deformation exceeded 0.2&#xa0;m, because these areas are closer to the offshore fault system. The N1_vas_al rock group is the primary landslide-prone rock pattern. Landslides occurred mainly on hills with elevation, relief, and slope values of 150 to 500&#xa0;m, 150 to 300&#xa0;m, and less than 30°, respectively. A comparison of similar recent seismic events in Japan revealed that the local rainfall and geological conditions of different earthquakes can affect their landslide scale.</p>

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Spatial analysis of landslides triggered by the 2024 Mw 7.5 Noto earthquake

  • 期刊论文

  • 发表日期：

    2025年12月8日

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  • Jing Zhang,
  • Weile Li,
  • Yu Guo,
  • Huan Liu,
  • Bo Zhao,
  • Ning Chen,
  • Xiao Jin,
  • Gang Sun

摘要

On January 1, 2024, a Mw 7.5 thrust earthquake (named the Noto earthquake) occurred on the Noto Peninsula of eastern Japan; the epicenter was located at 37.498° N and 137.242° E, and the focal depth was 16 km. On the basis of high-resolution satellite images and topographic, geological, and seismological data, the spatial and size distributions of the coseismic landslides triggered by this earthquake and their controlling factors are evaluated. The results indicate that the 2024 Noto earthquake triggered at least 3134 landslides within an affected area of 1794 km2 and that the highest concentration was 62 landslides/km2. The total landslide area and volume were 9.63 km2 and 24.7 million m3, respectively. More landslides were concentrated in the northern section of the Noto Peninsula, especially when the coseismic deformation exceeded 0.2 m, because these areas are closer to the offshore fault system. The N1_vas_al rock group is the primary landslide-prone rock pattern. Landslides occurred mainly on hills with elevation, relief, and slope values of 150 to 500 m, 150 to 300 m, and less than 30°, respectively. A comparison of similar recent seismic events in Japan revealed that the local rainfall and geological conditions of different earthquakes can affect their landslide scale.