Preliminary results on a near-real-time rock slope damage monitoring system based on relative velocity changes following the September 5, 2022 MS 6.8 Luding, China earthquake
Relative seismic velocity change (dv/v) is important for monitoring changes in subsurface material properties and evaluating earthquake-induced rock slope damage in a geological disaster-prone region. In this paper, we present a rapid damage assessment on three slow-moving rock slopes by measuring d...
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| Format: | Article |
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KeAi Communications Co. Ltd.
2023-01-01
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| Series: | Earthquake Research Advances |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2772467022000938 |
| _version_ | 1797895453586489344 |
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| author | Fan Xie Chen Liang Shigui Dai Bo Shao Huibao Huang Jinhui Ouyang Li Li Eric Larose |
| author_facet | Fan Xie Chen Liang Shigui Dai Bo Shao Huibao Huang Jinhui Ouyang Li Li Eric Larose |
| author_sort | Fan Xie |
| collection | DOAJ |
| description | Relative seismic velocity change (dv/v) is important for monitoring changes in subsurface material properties and evaluating earthquake-induced rock slope damage in a geological disaster-prone region. In this paper, we present a rapid damage assessment on three slow-moving rock slopes by measuring dv/v decrease caused by the 2022 MS 6.8 Luding earthquake in Southwest China. By applying the stretching method to the cross-correlated seismic wavefields between sensors installed on each slope, we obtain earthquake-induced dv/v decreases of ∼2.1%, ∼0.5%, and ∼0.2% on three slopes at distances ranging from ∼86 to ∼370 km to the epicenter, respectively. Moreover, based on seismic data recorded by 16 sensors deployed on the rock slope at a distance of ∼370 km away from the epicenter, a localized dv/v decease region was observed at the crest of the slope by calculating the spatial dv/v images before and after the earthquake. We also derive an empirical in situ stress sensitivity of −7.29✕10−8/Pa by relating the dv/v change to the measured peak dynamic stresses. Our results indicate that a rapid dv/v assessment not only can help facilitate on-site emergency response to earthquake-induced secondary geological disasters but also can provide a better understanding of the subsurface geological risks under diverse seismic loadings. |
| first_indexed | 2024-04-10T07:27:08Z |
| format | Article |
| id | doaj.art-05ba3e7ea3dd4e19982e273bf8846502 |
| institution | Directory Open Access Journal |
| issn | 2772-4670 |
| language | English |
| last_indexed | 2024-04-10T07:27:08Z |
| publishDate | 2023-01-01 |
| publisher | KeAi Communications Co. Ltd. |
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| series | Earthquake Research Advances |
| spelling | doaj.art-05ba3e7ea3dd4e19982e273bf88465022023-02-24T04:32:05ZengKeAi Communications Co. Ltd.Earthquake Research Advances2772-46702023-01-0131100202Preliminary results on a near-real-time rock slope damage monitoring system based on relative velocity changes following the September 5, 2022 MS 6.8 Luding, China earthquakeFan Xie0Chen Liang1Shigui Dai2Bo Shao3Huibao Huang4Jinhui Ouyang5Li Li6Eric Larose7Institute of Science and Technology, China Three Gorges Corporation, Beijing 100089, China; Key Laboratory of Earthquake Source Physics, China Earthquake Administration, Beijing 100081, China; Corresponding author. Institute of Science and Technology, China Tree Gorges Corporation, Beijing, China.Institute of Science and Technology, China Three Gorges Corporation, Beijing 100089, ChinaSichuan Earthquake Agency, Chengdu 610044, ChinaInstitute of Science and Technology, China Three Gorges Corporation, Beijing 100089, ChinaDadu River Hydropower Development Co., Ltd., Chengdu 610016, ChinaInstitute of Science and Technology, China Three Gorges Corporation, Beijing 100089, ChinaKey Laboratory of Earthquake Source Physics, China Earthquake Administration, Beijing 100081, ChinaISTerre, CNRS, and University Grenoble Alpes, Grenoble, FranceRelative seismic velocity change (dv/v) is important for monitoring changes in subsurface material properties and evaluating earthquake-induced rock slope damage in a geological disaster-prone region. In this paper, we present a rapid damage assessment on three slow-moving rock slopes by measuring dv/v decrease caused by the 2022 MS 6.8 Luding earthquake in Southwest China. By applying the stretching method to the cross-correlated seismic wavefields between sensors installed on each slope, we obtain earthquake-induced dv/v decreases of ∼2.1%, ∼0.5%, and ∼0.2% on three slopes at distances ranging from ∼86 to ∼370 km to the epicenter, respectively. Moreover, based on seismic data recorded by 16 sensors deployed on the rock slope at a distance of ∼370 km away from the epicenter, a localized dv/v decease region was observed at the crest of the slope by calculating the spatial dv/v images before and after the earthquake. We also derive an empirical in situ stress sensitivity of −7.29✕10−8/Pa by relating the dv/v change to the measured peak dynamic stresses. Our results indicate that a rapid dv/v assessment not only can help facilitate on-site emergency response to earthquake-induced secondary geological disasters but also can provide a better understanding of the subsurface geological risks under diverse seismic loadings.http://www.sciencedirect.com/science/article/pii/S2772467022000938Relative velocity changeRock slope damageLuding earthquakeSpace-time evolution |
| spellingShingle | Fan Xie Chen Liang Shigui Dai Bo Shao Huibao Huang Jinhui Ouyang Li Li Eric Larose Preliminary results on a near-real-time rock slope damage monitoring system based on relative velocity changes following the September 5, 2022 MS 6.8 Luding, China earthquake Earthquake Research Advances Relative velocity change Rock slope damage Luding earthquake Space-time evolution |
| title | Preliminary results on a near-real-time rock slope damage monitoring system based on relative velocity changes following the September 5, 2022 MS 6.8 Luding, China earthquake |
| title_full | Preliminary results on a near-real-time rock slope damage monitoring system based on relative velocity changes following the September 5, 2022 MS 6.8 Luding, China earthquake |
| title_fullStr | Preliminary results on a near-real-time rock slope damage monitoring system based on relative velocity changes following the September 5, 2022 MS 6.8 Luding, China earthquake |
| title_full_unstemmed | Preliminary results on a near-real-time rock slope damage monitoring system based on relative velocity changes following the September 5, 2022 MS 6.8 Luding, China earthquake |
| title_short | Preliminary results on a near-real-time rock slope damage monitoring system based on relative velocity changes following the September 5, 2022 MS 6.8 Luding, China earthquake |
| title_sort | preliminary results on a near real time rock slope damage monitoring system based on relative velocity changes following the september 5 2022 ms 6 8 luding china earthquake |
| topic | Relative velocity change Rock slope damage Luding earthquake Space-time evolution |
| url | http://www.sciencedirect.com/science/article/pii/S2772467022000938 |
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