Ground Deformation Imagery of the May Sichuan Earthquake

Stramondo, Salvatore; Chini, Marco; Salvi, Stefano; Bignami, Christian; Zoffoli, Simona; Boschi, E.

doi:10.1029/2008eo370002

Cited by 14 publications

(8 citation statements)

References 4 publications

(3 reference statements)

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“…Finally, from the same figure it can be observed that the DinSAR ground deformations result reported for the vicinity of the Chengdu region is of 0.12 m, which is also of the order of the maximum permanent synthetic displacements values of the synthetics for this town. From these results, we think that the comparisons of the synthetic displacements obtained in this work are in reasonable agreement with the DinSAR results of Ge et al (2008) and Stramondo et al (2008) fig. 3.1 in Yuan and Sun, 2008) is presented in Figure 18.…”

Section: Modeling Resultssupporting

confidence: 88%

Low-Frequency 3D Wave Propagation Modeling of the 12 May 2008 Mw 7.9 Wenchuan Earthquake

Chávez¹,

Cabrera²,

Madariaga³

et al. 2010

Bulletin of the Seismological Society of America

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The seismic potential of southern China is associated with the collision between the Indian and the Eurasian plates. This is manifested in the western Sichuan Plateau by several seismically active systems of faults, such as the Longmen Shan. The seismicity observed on the Longmen Shan fault includes recent events with magnitudes of up to 6.5, and the one of 12 May 2008 M w 7.9 Wenchuan earthquake. Herewith, as part of an ongoing research program, a recently optimized threedimensional (3D) seismic wave propagation parallel finite-difference code was used to obtain low-frequency (≤ 0:3 Hz) 3D synthetic seismograms for the Wenchuan earthquake. The code was run on KanBalam (Universidad Nacional Autónoma de México, Mexico) and HECToR (UK National Supercomputing Service) supercomputers. The modeling included the U.S. Geological Survey 40 × 315 km 2 kinematic description of the earthquake's rupture, embedded in a 2400 × 1600 × 300 km 3 physical domain, spatially discretized at 1 km in the three directions and a temporal discretization of 0.03 s. The compression and shear wave velocities and densities of the geologic structure used were obtained from recently published geophysical studies performed in the Sichuan region. The synthetic seismograms favorably compare with the observed ones for several station sites of the Seismological and Accelerographic Networks of China, such as MZQ, GYA, and TIY, located at about 90, 500, and 1200 km, respectively, from the epicenter of the Wenchuan event. Moreover, the comparisons of synthetic displacements with differential radar interferometry (DinSAR) ground deformation imagery, as well as of maximum velocity synthetic patterns with Mercalli modified intensity isoseist of the 2008 Wenchuan earthquake, are acceptable. 3D visualizations of the propagation of the event were also obtained; they show the source rupture directivity effects of the M w 7.9 Wenchuan event. Our results partially explain the extensive damage observed on the infrastructure and towns located in the neighborhood of the Wenchuan earthquake rupture zone.

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Section: Modeling Resultssupporting

confidence: 88%

Low-Frequency 3D Wave Propagation Modeling of the 12 May 2008 Mw 7.9 Wenchuan Earthquake

Chávez¹,

Cabrera²,

Madariaga³

et al. 2010

Bulletin of the Seismological Society of America

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“…The phase differences are then calculated and converted into height information, which can clearly indicate surface deformation related to earthquakes [Tronin, 2006]. InSAR has attracted much attention from researchers involved with landslide monitoring and hazard assessment associated with the earthquakes [Stramondo et al, 2008]. Figure 1d show the forest areas devastated by the earthquake (image from Taiwan's space organization (NSPO) Figure 1h represent light scattering from many collapsed buildings.…”

Section: Satellite Monitoring Of Existing Hazardsmentioning

confidence: 99%

Using Satellite Data to Investigate the 12 May 2008 Sichuan Earthquake, China

Pan

Tang

2009

EoS Transactions

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The M 8.0 earthquake that struck Sichuan Province in southwestern China on 12 May 2008 was the most devastating earthquake in that country in the past 5 decades. At least 69,000 deaths have been confirmed and more than 374,000 people were injured, according to China's Ministry of Civil Affairs. Overall, more than 45.5 million people in 10 provinces and regions in China were affected by the earthquake. Landslides and rockfalls damaged or destroyed several mountain roads and railways and buried buildings in the Beichuan‐Wenchuan area of Sichuan Province, cutting off access to the region for several days (Figures 1a and 1b). Landslides also dammed several rivers, and the resultant creation of 36 barrier lakes (dangerous earthquake lakes) threatened about 700,000 people downstream.

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Section: Better Preparedness Through Better Mapsmentioning

confidence: 99%

Tsunami: scientific frontiers, mitigation, forecasting and policy implications

Bernard

Mofjeld

Titov

et al. 2006

Phil. Trans. R. Soc. A.

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Tsunamis are an ever-present threat to lives and property along the coasts of most of the world's oceans. As the Sumatra tsunami of 26 December 2004 reminded the world, we must be more proactive in developing ways to reduce their impact on our global society. This article provides an overview of the state of knowledge of tsunamis, presents some challenges confronting advances in the field and identifies some promising frontiers leading to a global warning system. This overview is then used to develop guidelines for advancing the science of forecasting, hazard mitigation programmes and the development of public policy to realize a global system. Much of the information on mitigation and forecasting draws upon the development and accomplishments of a joint state/federal partnership that was forged to reduce tsunami hazards along US coastlines-the National Tsunami Hazard Mitigation Programme. By integrating hazard assessment, warning guidance and mitigation activities, the programme has created a roadmap and a set of tools to make communities more resilient to local and distant tsunamis. Among the tools are forecasting, educational programmes, early warning systems and design guidance for tsunami-resilient communities. Information on international cooperation is drawn from the Global Earth Observing System of Systems (GEOSS). GEOSS provides an international framework to assure international compatibility and interoperability for rapid exchange of data and information.

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Ground Deformation Imagery of the May Sichuan Earthquake

Cited by 14 publications

References 4 publications

Low-Frequency 3D Wave Propagation Modeling of the 12 May 2008 Mw 7.9 Wenchuan Earthquake

Low-Frequency 3D Wave Propagation Modeling of the 12 May 2008 Mw 7.9 Wenchuan Earthquake

Using Satellite Data to Investigate the 12 May 2008 Sichuan Earthquake, China

Tsunami: scientific frontiers, mitigation, forecasting and policy implications

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