Comparison of Injury Epidemiology Between the Wenchuan and Lushan Earthquakes in Sichuan, China

2014 ◽  
Vol 8 (6) ◽  
pp. 541-547 ◽  
Author(s):  
Yang Hu ◽  
Xi Zheng ◽  
Yong Yuan ◽  
Qiang Pu ◽  
Lunxu Liu ◽  
...  
Keyword(s):  
Wenchuan Earthquake ◽  
Brain Injuries ◽  
Medical Center ◽  
Seismic Intensity ◽  
Lushan Earthquake ◽  
Anatomical Location ◽  
Trauma Centers ◽  
Patient Admissions ◽  
The Wenchuan Earthquake ◽  
The Relationship

AbstractObjectiveWe aimed to compare injury characteristics and the timing of admissions and surgeries in the Wenchuan earthquake in 2008 and the Lushan earthquake in 2013.MethodsWe retrospectively compared the admission and operating times and injury profiles of patients admitted to our medical center during both earthquakes. We also explored the relationship between seismic intensity and injury type.ResultsThe time from earthquake onset to the peak in patient admissions and surgeries differed between the 2 earthquakes. In the Wenchuan earthquake, injuries due to being struck by objects or being buried were more frequent than other types of injuries, and more patients suffered injuries of the extremities than thoracic injuries or brain trauma. In the Lushan earthquake, falls were the most common injury, and more patients suffered thoracic trauma or brain injuries. The types of injury seemed to vary with seismic intensity, whereas the anatomical location of the injury did not.ConclusionsGreater seismic intensity of an earthquake is associated with longer delay between the event and the peak in patient admissions and surgeries, higher frequencies of injuries due to being struck or buried, and lower frequencies of injuries due to falls and injuries to the chest and brain. These insights may prove useful for planning rescue interventions in trauma centers near the epicenter. (Disaster Med Public Health Preparedness. 2014;8:541-547)

scholarly journals MACROSEISMICITY AND GEOLOGICAL EFFECTS OF THE WENCHUAN EARTHQUAKE (MS 8.0R - 12 MAY 2008), SICHUAN, CHINA: MACRO-DISTRIBUTION AND COMPARISON OF EMS1998 AND ESI2007 INTENSITIES

2017 ◽  
Vol 43 (3) ◽  
pp. 1361 ◽  
Author(s):  
E. Lekkas
Keyword(s):  
Wenchuan Earthquake ◽  
Comparative Evaluation ◽  
Large Scale ◽  
Seismic Intensity ◽  
Tectonic Structures ◽  
Seismic Fault ◽  
The Wenchuan Earthquake ◽  
Event Based ◽  
Seismic Hazard Estimation

The Wenchuan earthquake of the 12th of May 2008, in Sichuan county of China can be classified as a large scale event based on the tectonic structures that triggered the earthquake and the effects caused on the human, structural and natural environment. The aim of this paper is to present the geotectonic and seismotectonic regime of the earthquake affected region based on field data along the seismic fault zone and an attempt is made towards the: (i) estimation of the intensity values according to EMS1998 (European Microseismic Scale, 1998) and ESI2007 (Environmental Seismic Intensity Scale, 2007) and the determination of their geographical distribution in a macroscale, (ii) interpretation of the intensity values data and their distribution according to the seismotectonic, geodynamic and geotechnical regime, and (iii) conduction of a comparative evaluation review on the application of both EMS1998 and ESI2007. The application of both EMS1998 and ESI2007 and the comparative evaluation of the results indicate that the estimated values of EMS1998 and ESI2007 were almost in agreement, despite the fact that the geographical locations of assessment data were different suggesting that the application and use of both scales appears to represent a useful and reliable tool for seismic hazard estimation.

Study on Instrumental Intensity Using Wenchuan Earthquake Records

2012 ◽  
Vol 226-228 ◽  
pp. 2235-2239
Author(s):  
Ming Zhang ◽  
Yu Zhang ◽  
Guang Chun Zhou
Keyword(s):  
Wenchuan Earthquake ◽  
Peak Ground Acceleration ◽  
Seismic Intensity ◽  
Peak Ground Velocity ◽  
Regression Equations ◽  
Ground Acceleration ◽  
Earthquake Records ◽  
The Wenchuan Earthquake ◽  
Instrumental Intensity ◽  
Seismic Intensity Scale

This paper invesigates the peak ground acceleration (PGA) and peak ground velocity (PGV) regression equations as well as the PGA or PGV middle values in Chinese seismic intensity scale 2008 (the CSIS 2008), using the Wenchuan earthquake records of China with the full seismic information. Based on the analytical results, the PGA-V method is proposed to assess the instrumental intensity which combines both PGA and PGV. Besides, a problem is raised to further verify and modify the middle values of PGA or PGV for the seismic intensity VI and VII in the CSIS 2008.

scholarly journals Electromagnetic Anomalies around The Wenchuan Earthquake and Their Relationship with Earthquake Preparation

2011 ◽  
Vol 2011 ◽  
pp. 1-8 ◽  
Author(s):  
Xuemin Zhang ◽  
Xuhui Shen
Keyword(s):  
Wenchuan Earthquake ◽  
Coupling Mechanism ◽  
Preparation Process ◽  
Mechanism Analysis ◽  
Electromagnetic Parameters ◽  
Earthquake Preparation ◽  
The Wenchuan Earthquake ◽  
Electromagnetic Precursors ◽  
The Relationship

Electromagnetic precursors before the Wenchuan earthquake on May 12, 2008 were collected and summarized on the basis of related published papers. The relationship between electromagnetic anomalies and different earthquake preparation stages was analyzed, and an entire seismic preparation process was constructed according to corresponding anomalies in different electromagnetic parameters. It is illustrated that stereo electromagnetic observation is useful in the understanding of earthquake preparation mechanism. It is inevitable that a lot of problems exist in anomaly distinguishing and coupling mechanism analysis, which needs further studies in future.

scholarly journals The Relationship between the Damage Rate of High Voltage Electrical Equipment and Instrumental Seismic Intensity

2020 ◽  
Author(s):  
Rushan Liu ◽  
Mingpan Xiong ◽  
Deyuan Tian
Keyword(s):  
Wenchuan Earthquake ◽  
High Voltage ◽  
Electrical Equipment ◽  
Seismic Intensity ◽  
Probability Density Distribution ◽  
Damage Rate ◽  
Damage Probability ◽  
Instrumental Intensity ◽  
The Impact ◽  
The Relationship

Wenchuan earthquake that occurred in China in 2008 caused severe damage to a large number of electric substations. In this paper, Kriging interpolation method was used to calculate the impact area of the instrumental seismic intensity in Wenchuan earthquake, and to compare the intensities based on strong motion observation against the instrumental seismic intensities at locations where the observation data is available. The instrumental seismic intensities were calculated for the Wenchuan Earthquake at substations in the national power grid with voltage of 110kV or higher in areas of Mianyang, Deyang, Guangyuan and Chengdu. The cumulative Gaussian distribution function was then used to fit the relationship of the curves of the damage probabilities of high-voltage electrical equipment such as transformers, voltage mutual inductors, current mutual inductors, circuit breakers, isolating switches and lightning arrester with their instrumental seismic intensities. The damage probability density distribution curve of high-voltage electrical equipment based on the instrumental seismic intensities was obtained. The results showed that: (1) In the lower seismic intensity region, the mean instrumental seismic intensity was in good agreement with the traditional seismic intensity, but there was noticeable dispersion; in regions of intensity IX and above, the instrumental intensity was lower than the seismic intensity, but there was a lower degree of dispersion. (2) Among high-voltage electrical equipment, the transformers were most vulnerable to damage and they had some damage even under lower instrumental intensity. More damage would be produced when the instrumental intensity reached VIII or above; the second most vulnerable equipment was the circuit breaker, and the damage was most likely to occur when the instrument intensity was IX or above . (3) The damage rate curves of lightning arresters, current mutual inductors, voltage mutual inductors and isolating switches were relatively close to each other and the damage probability was the highest when the instrumental intensity was about X.

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