Fast report: preliminary analysis of coseismic landslides in the 2025 M6.4 Dapu earthquake
Abstract After the 2025 M6.4 Dapu earthquake, the Agency of Rural Development and Soil and Water Conservation (ARDSWC) identified 29 coseismic landslides using Sentinel-2 and PlanetScope satellite imagery. Two-thirds of these landslides occurred south of the epicenter, indicating a likely southward...
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Springer
2025-04-01
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| Series: | Terrestrial, Atmospheric and Oceanic Sciences |
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| Online Access: | https://doi.org/10.1007/s44195-025-00105-w |
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| author | Yi-Yu Li Chun-En Lin Chen-Yu Chen |
| author_facet | Yi-Yu Li Chun-En Lin Chen-Yu Chen |
| author_sort | Yi-Yu Li |
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| description | Abstract After the 2025 M6.4 Dapu earthquake, the Agency of Rural Development and Soil and Water Conservation (ARDSWC) identified 29 coseismic landslides using Sentinel-2 and PlanetScope satellite imagery. Two-thirds of these landslides occurred south of the epicenter, indicating a likely southward rupture. These landslides are found to (1) locate in areas where PGA exceeded 250 cm/s2 and PGV over 17 cm/s (2) occur on 30° to 50° slopes, often on southeast- to southwest-facing aspects. Dip slopes and the reactivation of historical landslides were key contributing factors. Although satellite imagery detected fewer landslides than other earthquakes with comparable magnitude, our field surveys revealed numerous fresh landslide scarps in areas with PGA over 400 cm/s2 and PGV around 30 cm/s. Our analysis provides useful information of coseismic landslide behaviors and the triggering factors in the Dapu event. These findings highlight the importance of detailed post-earthquake landslide mapping and field investigations, which provides key information for advanced hazard mitigation plans for seismically affected regions in preparation for the upcoming rainy season. |
| format | Article |
| id | doaj-art-8b01b588b43f4de79d0380ea8d18cec2 |
| institution | OA Journals |
| issn | 1017-0839 2311-7680 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Springer |
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| series | Terrestrial, Atmospheric and Oceanic Sciences |
| spelling | doaj-art-8b01b588b43f4de79d0380ea8d18cec22025-08-20T02:28:08ZengSpringerTerrestrial, Atmospheric and Oceanic Sciences1017-08392311-76802025-04-013611710.1007/s44195-025-00105-wFast report: preliminary analysis of coseismic landslides in the 2025 M6.4 Dapu earthquakeYi-Yu Li0Chun-En Lin1Chen-Yu Chen2Agricultural Technology Research InstituteAgency of Rural Development and Soil and Water ConservationAgency of Rural Development and Soil and Water ConservationAbstract After the 2025 M6.4 Dapu earthquake, the Agency of Rural Development and Soil and Water Conservation (ARDSWC) identified 29 coseismic landslides using Sentinel-2 and PlanetScope satellite imagery. Two-thirds of these landslides occurred south of the epicenter, indicating a likely southward rupture. These landslides are found to (1) locate in areas where PGA exceeded 250 cm/s2 and PGV over 17 cm/s (2) occur on 30° to 50° slopes, often on southeast- to southwest-facing aspects. Dip slopes and the reactivation of historical landslides were key contributing factors. Although satellite imagery detected fewer landslides than other earthquakes with comparable magnitude, our field surveys revealed numerous fresh landslide scarps in areas with PGA over 400 cm/s2 and PGV around 30 cm/s. Our analysis provides useful information of coseismic landslide behaviors and the triggering factors in the Dapu event. These findings highlight the importance of detailed post-earthquake landslide mapping and field investigations, which provides key information for advanced hazard mitigation plans for seismically affected regions in preparation for the upcoming rainy season.https://doi.org/10.1007/s44195-025-00105-wDapu earthquakeCoseismic landslidesDirectivity effectTopographic site effectEarthquake legacy effect |
| spellingShingle | Yi-Yu Li Chun-En Lin Chen-Yu Chen Fast report: preliminary analysis of coseismic landslides in the 2025 M6.4 Dapu earthquake Terrestrial, Atmospheric and Oceanic Sciences Dapu earthquake Coseismic landslides Directivity effect Topographic site effect Earthquake legacy effect |
| title | Fast report: preliminary analysis of coseismic landslides in the 2025 M6.4 Dapu earthquake |
| title_full | Fast report: preliminary analysis of coseismic landslides in the 2025 M6.4 Dapu earthquake |
| title_fullStr | Fast report: preliminary analysis of coseismic landslides in the 2025 M6.4 Dapu earthquake |
| title_full_unstemmed | Fast report: preliminary analysis of coseismic landslides in the 2025 M6.4 Dapu earthquake |
| title_short | Fast report: preliminary analysis of coseismic landslides in the 2025 M6.4 Dapu earthquake |
| title_sort | fast report preliminary analysis of coseismic landslides in the 2025 m6 4 dapu earthquake |
| topic | Dapu earthquake Coseismic landslides Directivity effect Topographic site effect Earthquake legacy effect |
| url | https://doi.org/10.1007/s44195-025-00105-w |
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