2017 Jiuzhaigou earthquake

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2017 Jiuzhaigou earthquake
2017年九寨沟地震
2017 Jiuzhaigou earthquake is located in Sichuan
2017 Jiuzhaigou earthquake
Date 8 August 2017
Origin time 21:19:49.570 CST (UTC+8) (USGS)
Duration 15 seconds[1]
Magnitude Ms 7.0 (CENC)
Mw 6.5 (USGS)
Depth about 20 kilometres (CENC)
9 kilometres (USGS)
Epicenter 33°11′35″N 103°51′18″E / 33.193°N 103.855°E / 33.193; 103.855Coordinates: 33°11′35″N 103°51′18″E / 33.193°N 103.855°E / 33.193; 103.855
Zhangzha Town, Jiuzhaigou County, Ngawa Prefecture, Sichuan Province, China
Areas affected Sichuan Province, Gansu Province and Shaanxi Province
Max. intensity VII (USGS)
Aftershocks 1,741 (including 30 major aftershocks)
Casualties 25 dead, 525 injured

The 2017 Jiuzhaigou earthquake occurred on 8 August 2017, in Zhangzha Town, Jiuzhaigou County, Ngawa Prefecture, Sichuan Province, China. The earthquake was registered at Ms 7.0 and killed at least 25 people in the mountainous region of northern Sichuan.[2]

Earthquake

The distribution of the seismic intensity of this earthquake, where the epicentre is labelled with a star (USGS)

The earthquake struck at 21:19:46 China Standard Time (CST, UTC+8) on 8 August 2017 in Zhangzha Town in Jiuzhaigou County (33°12′N 103°49′E / 33.20°N 103.82°E / 33.20; 103.82) with magnitude 7.0.[a][b][7] Cities as far away as Lanzhou, Chengdu and Xi'an felt the quake.[8] The epicenter was 39 kilometres from the county seat of Jiuzhaigou County, 66 kilometres from Songpan County, 83 kilometres from Zhouqu County, 90 kilometres from Zoigê County, 105 kilometres from Longnan City, and 285 kilometres from Chengdu City.[9]

Setting

Northern Sichuan lies in an area with high tectonic activity. In this region, the Tibetan Plateau abuts against the Yangtze Plate with immense pressure forming faults along the edges.[10] Jiuzhaigou County is located in the Min Mountains, a range that was formed at the intersection of these faults. The devastating 1879 Gansu earthquake had its epicenter approximately 65 km (40 mi) to the east of where the 2017 Jiuzhaigou earthquake occurred. The mountainous areas to the south of Jiuzhaigou County were the epicenter of the 2008 Sichuan earthquake that resulted in tens of thousands of fatalities.

Impacts

According to what the China Earthquake Administration announced, the graph[1] showed that the seismic intensity could be higher than level IX, and the earthquake epicentre in Zhangzha County could reach level VIII.

After the earthquake, the entire Jiuzhaigou County completely suffered a power failure.[11] The eyewitnesses found that some buildings had fallen off in Jiuzhaigou Valley Scenic and Historic Interest Area.[12] The staff of the Jiuzhaigou Valley Scenic and Historic Interest Area told the correspondent from Xinhua News Agency that in the fourth ditch of the Jiuzhaigou Valley Scenic and Historic Interest Area a house had collapsed and cracked, and the locals were stepping up to evacuate people.

Rescue

The China Earthquake Administration put up a Level I reaction, changing to Level II afterwards, and sent troops to the earthquake area for rescue.[13] At 21:26 CST (UTC+8), Health and Family Planning Commission of Sichuan Province started an emergency plan, and the medical rescue team was going to head to the earthquake area within one hour.[14] The Red Cross Society of China, Sichuan Branch[15] was on emergency standby, preparing for rescue.[16] In the small hours the next day, China's State Council Earthquake relief headquarters established national level Ⅱ earthquake emergency response.[17]

At 06:20 CST on 9 August, a Shuajingsi Town (刷经寺镇) militia vehicle had a traffic collision to a Sichuan F (Deyang) coach in Hongyuan County, Ngawa Prefecture. 3 people from the coach were injured and were being medically treated.[18]

Until 9 August 2017, there were 40 people critically injured, 7 of whom were transferred to other hospitals, 4 to West China Hospital of Sichuan University, and the rest to Jiuzhaigou County Hospital and Zhongzang Hospital.[12]

Casualties

The Emergency Management Office of the Ngawa Prefecture, Sichuan Province announced that until 13:10 CST on 9 August, the 7.0-magnitude earthquake in Zhangzha Town in Jiuzhaigou County killed 19 people and injured 247 people, including 40 people critically injured.[12] The following day, the death toll rose to 20 with over 400 injured.[19] Deaths and injuries mainly occurred in Zhangzha Town in Jiuzhaigou County.[12]

CST date and time Fatalities Injuries Sources References
Critical injuries Minor injuries Total injuries
2017-08-08 21:19:46 (main tremor occurred) China Earthquake Networks Center
(中国地震台网)
[20]
2017-08-08 23:39 1 4 4 Chengdu Tourism Administration
(成都市旅游局)
[21]
2017-08-08 23:58 5 63 Emergency Management Office of the Jiuzhaigou County
(九寨沟县应急办)
[22]
2017-08-09 02:08 5 88 China Central Television
(中国中央电视台)
[23]
2017-08-09 04:00 9 32 103 135 Information Office of Ngawa Prefecture Government
(阿坝州政府新闻办)
[24]
2017-08-09 05:00 9 164 Emergency Management Office of Ngawa Prefecture Government
(阿坝州人民政府应急管理办公室)
[25]
2017-08-09 08:10 12 Ngawa Weibo
(阿坝微博)
[26]
2017-08-09 08:58 12 28 147 175 People's Daily
(人民日报)
[27]
2017-08-09 09:30 13 175 Information Office of Sichuan Province Government
(四川省政府新闻办)
[28]
2017-08-09 13:10 19 40 207 247 Emergency Management Office of Ngawa Prefecture Government
(阿坝州人民政府应急管理办公室)
[12]
2017-08-10 12:00 20 18 413 431 Emergency Management Office of the Jiuzhaigou County
(九寨沟县应急办)
[29]
2017-08-11 19:00 23 45 448 493 Emergency Management Office of Ngawa Prefecture Government
(阿坝州人民政府应急管理办公室)
[30]
*All the times are reporting times, so the reported casualties might possibly be different from the actual casualties.

Aftershocks

Aftershocks of 2017 Jiuzhaigou earthquake

As of 10 August 2017 10:00 CST (UTC+8), 1,741 aftershocks had occurred, including 30 major ones.[1][31] Some experts predicted that the aftershocks might reach a magnitude of 6 after several days.[32] The major aftershocks reported by China Earthquake Networks Center are listed below:

See also

Notes

  1. ^ The result from United States Geological Survey was Mw 6.5, with depth 9.0 kilometres[3]
  2. ^ China Earthquake Networks Center automatically reported 6.5 at first, and then formally reported 7.0.[4][5][6]

References

  1. ^ a b c "四川阿坝州九寨沟7.0级地震综合图集". Retrieved 8 August 2017. 
  2. ^ "Sichuan earthquake kills 25, injuring 525". Retrieved 2017-09-26. 
  3. ^ "M 6.5 - 35km WSW of Yongle, China". USGS Earthquake Hazards Program. Retrieved 8 August 2017. 
  4. ^ "九寨沟发生6.5级地震 广元震感明显". 四川新闻——四川在线 (in Chinese). Retrieved 8 August 2017. 
  5. ^ "四川阿坝州九寨沟县附近发生6.5级左右地震". 新浪网 (in Chinese). Retrieved 8 August 2017. 
  6. ^ "四川阿坝州九寨沟县发生6.5级地震". 凤凰新闻-手机凤凰网 (in Chinese). Retrieved 8 August 2017. 
  7. ^ "四川阿坝州九寨沟县7.0级地震" (in Chinese). 中国地震台网. 8 August 2017. 
  8. ^ 張心怡 (8 August 2017). "四川九寨溝發生7.0級地震 再有3.5級餘震 西安蘭州等地有震感". 香港01 (in Chinese). Retrieved 8 August 2017. 
  9. ^ 中国地震台网. "一文读懂四川九寨沟县发生7.0级地震" (in Chinese). 腾讯新闻. Retrieved 8 August 2017. 
  10. ^ Zhang, Zhongjie; Yuan, Xiaohui; Chen, Yun; Tian, Xiaobo; Kind, Rainier; Li, Xueqing; Teng, Jiwen (April 2010). "Seismic signature of the collision between the east Tibetan escape flow and the Sichuan Basin". Earth and Planetary Science Letters. 292 (3–4): 254–264. Retrieved 11 April 2017. 
  11. ^ 张博. "九寨沟7级地震强烈震感持续十几秒 目前全城停电". 中国青年网 (in Chinese). Retrieved 8 August 2017. 
  12. ^ a b c d e "四川九寨沟县发生7级地震多地震感强烈". BBC 中文网 (in Chinese). 8 August 2017. Retrieved 8 August 2017. 
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  19. ^ "九寨溝地震19死 6萬遊客安全疏散 救援級別降 料傷亡不會擴大". 明報新聞網 (in Chinese). 2017-08-10. Retrieved 2017-08-10. 
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  21. ^ "成都市旅游局:赴九寨沟旅行团已有1人死亡4人受伤". 成都全搜索新闻网. 8 August 2017. 
  22. ^ "四川阿坝州地震已造成5人死亡 均为游客". 环球日报. 8 August 2017. 
  23. ^ "九寨沟地震已致5人遇难88人受伤 死者均为游客". 新浪网. 9 August 2017. 
  24. ^ "九寨沟7.0级地震已造成9人死亡、受伤135人". 新浪网. 9 August 2017. 
  25. ^ "九寨沟地震9人死亡 设立避难场所疏散3.15万游客". 阿坝州. 9 August 2017. 
  26. ^ "九寨沟7.0级地震已造成12人死亡 175人受伤". 中国新闻网. 9 August 2017. 
  27. ^ "九寨沟地震已致12人死亡175人受伤 3人身份不明". 新浪网. 9 August 2017. 
  28. ^ "九寨沟7级地震已造成13人死亡、175人受伤". 新华网. 9 August 2017. 
  29. ^ "九寨沟地震已致20人死亡,431人受伤". 新浪网 (in Chinese). 10 August 2017. Archived from the original on 10 August 2017. 
  30. ^ "九寨沟7.0级地震已造成23人死亡". 新浪网 (in Chinese). 11 August 2017. 
  31. ^ "九寨沟县余震衰减情况正常 已发生余震1741个 最大余震4.8级". 网易新闻 (in Chinese). 四川省地震局. 2017-08-10. Retrieved 2017-08-10. 
  32. ^ "7问九寨沟地震:为何5年内地震142次?". 新浪网 (in Chinese). 中国新闻网. 2017-08-09. Retrieved 2017-08-09. 
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External links

  • Wikinews-logo.svg News related to M7.0 Earthquake occurred in Sichuan China, at least 5 tourists dead at Wikinews
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