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Primary Quantitative Study on earthquake Damage Extracted from Remote Sensing Imagery——A Case Study of Seismic Damage in the Urban Area of Dujiangyan due to the M_S8.0 Wenchuan earthquake

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earthquake Research in China 2009年第4期23卷 392-401页

作者： Wang Xiaoqing Wang Long Zhang Xihai Ding Xiang Qiu Hu Dong Yanfang DouAixia Zhang Feiyu Liu Zaitao Institute of earthquake Science China Earthquake Administration Beijing 100036 China earthquake administration of Jiangsu Province Nanjing 210014 China earthquake administration of Tianjin Municipality Tianjin 300201 China China earthquake Networks Center Beijing 100045 China

The fast developing remote sensing techniques play an increasingly important role in earthquake emergency response, disaster survey and loss estimation. As there is a lack of quantitative studies on seismic damage based on remote sensing, its practicality in seismic disaster management has usually been questioned. The paper introduces the essential quantitative study idea, the concept of the remote sensing seismic damage index （D1RS） and analysis models, demonstrates the seismic damage indices （ D1G ） of buildings obtained from ground surveying and its quantitative relation to D1RS in Dujiangyan city, Sichuan Province, which was destroyed by the 2008 Wenchuan earthquake with Ms8.0. The primary results show that an obvious relationship exists between the D1RS of buildings obtained from the high resolution satellite or aerial remote sensing images and D1G or the building collapse ratio obtained through ground survey, which suggests that the quantitative study on seismic damage based on remote sensing will provide an effective method for seismic damage survey and loss estimation.

关键词： Seismic damage index Remote sensing Wenchuan earthquake Quantitative study

Lateral migration of fault activity in Weihe basin

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地震学报 2004年第2期26卷 174-182页

作者：冯希杰戴王强 earthquake administration of Shaanxi Province Xian 710068 China earthquake

Lateral migration of fault activity in Weihe basin is a popular phenomenon and its characteristics are also typical. Taking the activity migrations of Wangshun Mountain piedmont fault toward Lishan piedmont fault and Weinan platform front fault, Dabaopi-Niujiaojian fault toward Shenyusi-Xiaojiazhai fault, among a serial of NE-trending faults from Baoji city to Jingyang County as examples, their migration time and process are analyzed and discussed in the present paper. It is useful for further understanding the structure development and physiognomy evolution history of Weihe basin.

关键词：横向迁移断裂活动渭河盆地地震危险性

Landslide Hazard Mapping Using GIS and Weight of Evidence Model in Qingshui River Watershed of 2008 Wenchuan earthquake Struck Region

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Journal of Earth Science 2012年第1期23卷 97-120页

作者： Chong Xu Xiwei Xu Fuchu Dai Jianzhang Xiao Xibin Tan Renmao Yuan Key Laboratory of Active Tectenics and Volcano Institute of GeologyChina Earthquake AdministrationBeijing 100029China Institute of Geology and Geophysics Chinese Academy of SciencesBeijing 100029China

Tens of thousands of landslides were triggered by May 12, 2008 earthquake over a broad area. The main purpose of this article is to apply and verify earthquake-triggered landslide hazard analysis techniques by using weight of evidence modeling in Qingshui （清水） River watershed, Deyang （德阳） city, Sichuan （四川） Province, China. Two thousand three hundred and twenty-one landslides were interpreted in the study area from aerial photographs and multi-source remote sensing imageries post-earthquake, verified by field surveys. The landslide inventory in the study area was established. A spatial database, including landslides and associated controlling parameters that may have influence on the occurrence of landslides, was constructed from topographic maps, geological maps, and enhanced thematic mapper （ETM＋） remote sensing imageries. The factors that influence landslide occurrence,such as slope angle, aspect, curvature, elevation, flow accumulation, distance from drainages, and distance from roads were calculated from the topographic maps. Lithology, distance from seismogenic fault, distance from all faults, and distance from stratigraphic boundaries were derived from the geological maps. Normalized difference vegetation index （NDV1） was extracted from ETM＋ images. Seismic intensity zoning was collected from Wenchuan （汶川） Ms8.0 earthquake Intensity Distribution Map published by the China earthquake *** hazard indices were calculated using the weight of evidence model, and landslide hazard maps were calculated from using different controlling parameters cases. The hazard map was compared with known landslide locations and verified. The success accuracy percentage of using all 13 controlling parameters was 71.82%. The resulting landslide hazard map showed five classes of landslide hazard, i.e., very high, high, moderate, low, and very low. The validation results showed satisfactory agreement between the hazard map and the existing landslides distribution d

关键词： Wenchuan earthquake landslides weight of evidence Geographic Information Systems(GIS) landslide hazard mapping.

Characteristics of block strain and fault movement in the Sichuan-Yunnan region before and after Wenchuan earthquake

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Geodesy and Geodynamics 2012年第2期3卷 27-33页

作者： Zhao Jing Jiang Zaisen Wu Yanqiang Liu Xiaoxia Wei Wenxin Institute of earthquake Science China Earthquake AdministrationBeijing 100036China

Deformation characteristics of the Sichuan-Yunnan region during the two periods 1999--2007 and 2007--2009 are analyzed with a block deformation model and GPS velocity profiles. The results show that the direction of the principal compressive strain rate of the Northwest-Sichuan block - the Mid-Yunnan block - the Southwest-Yunnan block was characterized by a clockwise rotation from north to south. The Anninghe and the Zemuhe faults had some shear-strain accumulation. The southern segment of the Xiaojiang fault had mainly strike-slip movement, while the northern segment was mainly accumulating strain. The 2008 Ms8.0 Wenchuan earthquake had some influence on the mid-southern segment of the lijiang-Xiaojinhe fault, the Anninghe fault and the Jinshajiang fault, but not the Zemuhe fault, the Xiaojiang fault and the Red River fault as much.

关键词： GPS velocity field Wenchuan earthquake strain status of blocks faults deformation characteristics

Mainstreaming Disaster Risk Reduction and Climate Change Adaptation in Comprehensive Development Planning of the Cities in Nueva Ecija in the Philippines

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International Journal of Disaster Risk Science 2021年第3期12卷 367-380页

作者： Arneil G.Gabriel Patrick Neil M.Santiago Rosemarie R.Casimiro Department of Public administration Nueva Ecija University of Science and Technology3100 Cabanatuan CityPhilippines

Recent scientific consensus suggests that climate-related disasters are becoming more frequent and ***,increasing importance is given to disaster risk reduction(DRR)and climate change adaptation(CCA)in global *** projected global warming at 1.5℃and the climate variability that the Philippine archipelago experiences make DRR-CCA the key priorities of both the national and local government *** this study,we assessed and measured the degree of mainstreaming of DRR-CCA in the comprehensive development plans(CDPs)of the five component cities in the province of Nueva Ecija in the *** are among the areas in Central Luzon that are susceptible to hydrometeorological and geologic *** distributed survey questionnaires to 25 employees of the local government units in the five component cities in Nueva Ecija who are directly involved in planning *** triangulated their responses using archival data(review of written policies and plans).The main findings of the study indicate that in spite the presence of laws and policies on DRR-CCA,their implementation is only in the preliminary *** results also provide insights to policymakers and future researchers on the challenges and opportunities influencing the systemic mainstreaming of DRR-CCA in the province.

关键词： Climate-related disasters Global warming Local development planning Philippines Southeast Asia

Distribution of Landslides in Baoshan city,Yunnan Province,China

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earthquake Research in China 2020年第1期34卷 50-63页

作者： GAO Yuxin XU Chong TIAN Yingying MA Siyuan SHEN Lingling LU Yongkun RAN Hongliu Key Laboratory of Active Tectonics and Volcano Institute of GeologyChina Earthquake AdministrationBeijing 100029China Institute of Crustal Dynamics China Earthquake AdministrationBeijing 100085China Beijing Meteorological Information Center Beijing Meteorological ServiceBeijing 100089China Yunnan earthquake Agency Kunming 650224China

Using Google Earth software as a platform,this study has established an integrated database of both old and new landslides in Baoshan city,Yunnan Province,China,and analyzed their development characteristics together with distribution rules,*** on the results,a total of 2427 landslides occurred in the study area,including 2144 new landslides and 283 old landslides,with a total area of about104.8 km^*** new landslides are mostly in small-scales with an area less than 10000 m^2,while the area of individual old landslide is mostly larger than 10000 m^*** analyzing the relationship between the two types of landslides and eight impact factors(i.e.,elevation,slope angle,slope aspect,slope position,lithology,fault,regional Peak Ground Acceleration(PGA),and average annual rainfall),the different individual influencing factors,distribution regularities and mechanisms of the two types of landslides are *** detail,the main influencing factors of new landslides are elevation,slope angle,slope aspect,slope position,lithology,regional PGA and average annual rainfall,while the influencing factors of old landslides are mainly elevation,slope angle,and *** study provides basic data and support for landslide assessment and further disaster reduction in Baoshan ***,it also provides new constraints in deeply understanding the effect of different topographic and geological conditions,historical earthquakes,rainfall and other factors on the occurrence mechanisms of both new landslides and old landslides.

关键词： Baoshan city Old landslides New landslides Landslide density Distribution Mechanism

Study of the Structure of the Shenzhen Fault Zone with the Magnetotelluric Method

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earthquake Research in China 2011年第2期25卷 135-147页

作者： Chen Panglong Xiao Qibin Zhao Guoze Ma Haoming earthquake administration of Guangdong Province Guangzhou 510070 China Institute of Geology China Earthquake Administration Beijing 100029 China

The magnetotelluric sounding method was used to study the active fault in Shenzhen *** magnetotelluric profiles with a dense station interval were laid out across the Shenzhen fault *** remote reference technique was used in both data observation and processing to eliminate the electromagnetic noise near the survey sites,and relatively smooth apparent resistivity curves were *** mode data and two-dimensional inversion method as NLCG were used to obtain the electrical structures *** to the surficial geology survey results on regional strata and distribution of magmatic bodies and faults,the electrical structures at depths less than 2000m of each profile were *** regional faults,the Henggang-Luohu fault and the Liantang fault,and seven local faults consistent with the electrical boundaries were verified or *** strata in the survey area were then related with the change of *** horizontal slices of depths less than 5000m indicate that the Henggang-Luohu fault and the Liantang fault bifurcate at the shallow part but tend to merge in the deep part.

关键词： Magnetotellurics Two-dimensional inversion Structure Shenzhen fault zone

Seismic Risk Model for the Beijing-Tianjin-Hebei Region,China:Considering Epistemic Uncertainty from the Seismic Hazard Models

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International Journal of Disaster Risk Science 2024年第3期15卷 434-452页

作者： Jian Ma Katsuichiro Goda Kai Liu Silva Vitor Anirudh Rao Ming Wang Key Laboratory of earthquake Engineering and Engineering Vibration Institute of Engineering MechanicsChina Earthquake AdministrationKey Laboratory of Earthquake Disaster MitigationMinistry of Emergency ManagementHarbin150080China School of National Safety and Emergency Management Beijing Normal UniversityBeijing100875China Department of Earth Sciences Western UniversityLondonN6A 5B7Canada Global earthquake Model Foundation 27100PaviaItaly Shenzhen Key Laboratory of Urban Disasters Digital Twin Shenzhen518023China

This study presents a probabilistic seismic risk model for the Beijing-Tianjin-Hebei region in *** model comprises a township-level residential building exposure model,a vulnerability model derived from the Chinese building taxonomy,and a regional probabilistic seismic hazard *** three components are integrated by a stochastic event-based method of the OpenQuake engine to assess the regional seismic risk in terms of average annual loss and exceedance probability curve at the city,province,and regional *** novelty and uniqueness of this study are that a probabilistic seismic risk model for the Beijing-Tianjin-Hebei region in China is developed by considering the impact of site conditions and epistemic uncertainty from the seismic hazard model.

关键词： Beijing-Tianjin-Hebei region Epistemic uncertainty Seismic risk assessment Seismic risk model

Preliminary Study on the Dynamic Variations of the Surface Thermal Flux before and after the M_S5.7 earthquake of 2005 in Jiujiang city,Jiangxi Province

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earthquake Research in China 2008年第2期22卷 175-184页

作者： Chen Meihua Deng Zhihui Wang Yu Liao Zhihui Zu Jinhua Institute of Geology China Earthquake Administration Beijing 100029 China Institute of earthquake Science China Earthquake Administration Beijing 100036 China Nancheng Meteorological administration Jiangxi Province Fuzhou 344700 China

The temporal and spatial variations of surface latent heat flux(SLHF)and diagnostic air temperature at 2m before and after the M_S5.7 earthquake occurring on November 26,2005 in the area between Ruichang city and Jiujiang city,Jiangxi Province are summarized in this *** is found that before the earthquake significant SLHF anomalies and air temperature anomalies occurred in the epicentral area and its *** air temperature anomalies appeared from the 2nd to the 13th of November,2005 and were concentrated at the epicentral area and in its southern *** two days later,that is,from the 4th to the 15th of November 2005,significant SLHF anomalies occurred in the epicentral area and to its northern area where many lakes are distributed along the active *** the anomalous period,the SLHF and air temperature at 2m exceeded the sum of average daily value over 26 years and 1.5 times of its mean square *** anomalies had maintained for 12 days with a peculiar distribution related to the tectonic active *** is considered that both of air temperature anomalies and SLHF anomalies are correlated to the movement of thermal flux from underground prior to *** anomalies occurred over wide regions covered with abundant water,whereas air temperature anomalies occurred over land.

关键词： Air temperature Surface latent heat flux earthquake anomaly Jiujiang earthquake Satellite remote sensing