2008 Panzhihua earthquake

2008 Panzhihua earthquake
Date August 30, 2008 (2008-08-30)
Magnitude

6.1 Ms (CEA);[1][2]

5.7 Mw (USGS)[3]
Depth 10 km
Epicenter 26°00′N 101°54′E / 26.0°N 101.9°E / 26.0; 101.9
(Renhe (Chinese: 仁和), Panzhihua, Sichuan)
Areas affected People's Republic of China
Max. intensity Liedu VIII (Heavily damaging)
Tsunami None
Aftershocks 3 major, 439 total[4]
Casualties 41 killed, 589 injured (as of September 5, 2008)[5][6]

The 2008 Panzhihua earthquake struck southern Sichuan province, China on August 30 at 16:30:50.5 China Standard Time with a surface wave magnitude of 6.1 (5.7 Mw). It was not an aftershock of the Wenchuan earthquake that occurred in May of the same year. With more than 400 aftershocks, it caused over 40 deaths, the collapse of 10,000 homes and damage to other infrastructure in the area. Maximum intensity of this earthquake was VIII liedu (Heavily damaging).

Earthquake details

According to the China Earthquake Administration (CEA) and Sichuan Earthquake Administration (SCEA), a surface wave magnitude (Ms) 6.1 earthquake struck southern Sichuan province, China on August 30, 2008 at 16:30:50.5 China Standard Time (CST - 0730 UTC). The United States Geological Survey (USGS) reported the same earthquake at moment magnitude (Mw) 5.7.[3]

The earthquake's epicenter was located at 26°12′N 101°54′E / 26.2°N 101.9°E / 26.2; 101.9,[7] in the Renhe District of Panzhihua, Sichuan, which is 50 km southeast of the city center. The epicenter is 60 km from Huili County in Liangshan Yi Autonomous Prefecture, Sichuan, 30 km from Yongren County and 55 km from Yuanmou County in neighboring Yunnan province.[8]

The 2008 Panzhihua earthquake is also cited as the Renhe-Huili earthquake,[6][9][10] especially in SCEA reports and early CEA reports.

Aftershocks

A Ms 5.6 aftershock (5.5 Mw according to USGS) struck the same location on August 31, 2008 at 16:31:09.6 CST (08:31 UTC),[11][12][13] causing at least two additional deaths.[14]

By midnight CST September 1, there had been 439 aftershocks including the M5.6 one and two more exceeding M4.0.[4]

Incidentally, a Ms 3.0 earthquake very close to the main quake's epicenter preceded the main quake by 2 hours 15 minutes.[15]

Relation to Wenchuan earthquake

Whereas the Wenchuan earthquake two and half months earlier in the same province continues to invoke aftershocks even after August 30, the Panzhihua earthquake was not one of them because it was caused by a different fault line.[10][16]

Response in China

Although the quake-stricken area is relatively low in population, reported at 118/km2,[8] early casualties and property damages were significant.[17][18] Within two hours, the CEA invoked its Level III emergency response protocol for disaster relief. [19] 8,000 troops and para-militia were deployed to the disaster area.[14]

Casualties, intensities, and damage areas

By September 5, authorities confirmed 41 deaths (35 in Sichuan, 6 in Yunnan) and 589 injuries. CEA also reported collapse of 10,000 homes, and damage to 190,000 more. Considerable damages to highways, bridges, and reservoirs were reported.[5][6]

The seismic intensity map published by SCEA shows a maximum intensity of liedu VIII on China Seismic Intensity Scale (CSIS), somewhat equivalent to VIII (Heavily damaging) on EMS-94 from which CSIS drew reference.[20] The area affected by liedu VIII earthquakes covered a north-south oriented oval of 628 km2 centered around the epicenter, 39 km long and 19 km wide, including 28 km2 in Yunnan province. The total area of liedu VI (Slightly damaging) and above is 9,634 km2, of which 6,265 km2 are in Sichuan.

See also

References

  1. ↑ "Roughly: A M6.1 earthquake struck the border of Panzhihua and Huili, Sichuan. (四川攀枝花市仁和区、凉山彝族自治州会理县交界发生6.1级地震)" (in Chinese). CEA. August 30, 2008. Retrieved September 7, 2008.
  2. ↑ "Roughly: A M6.1 earthquake struck the border of Renhe-Huili. (仁和-会理交界发生6.1级地震)" (in Chinese). Sichuan Earthquake Administration (四川防震减灾信息网, SCEA). August 30, 2008. Archived from the original on March 28, 2009. Retrieved September 7, 2008.
  3. 1 2 "Magnitude 5.7 - SICHUAN-YUNNAN BORDER REGION, CHINA". USGS. August 30, 2008. Archived from the original on August 31, 2008. Retrieved September 1, 2008.
  4. 1 2 "Roughly: 439 aftershocks since the M6.1 Panzhihua earthquake (四川省攀枝花6.1级地震后已发生439次余震)" (in Chinese). CEA. August 31, 2008. Archived from the original on September 9, 2008. Retrieved September 7, 2008.
  5. 1 2 "Roughly: The M6.1 Panzhihua earthquake has caused 38 deaths and 589 injuries (四川攀枝花市6.1级地震已造成38人死亡，589人受伤)" (in Chinese). CEA. September 2, 2008. Archived from the original on September 13, 2008. Retrieved September 7, 2008.
  6. 1 2 3 "Roughly: Death toll in our province from the M6.1 Renhe-Huili earthquake has increased by 3 (仁和-会理6.1级地震我省新增死亡3人)" (in Chinese). Sichuan Earthquake Administration (四川防震减灾信息网, SCEA). September 5, 2008. Archived from the original on September 13, 2008. Retrieved September 7, 2008.
  7. ↑ This is given by CEA. USGS reports latitude as 26.0.
  8. 1 2 "Roughly: CEA immediately launches emergency response to the M6.1 Panzhihua-Huili earthquake (中国地震局立即开展四川攀枝花市仁和区、凉山彝族自治州会理县交界6.1级地震应急响应)" (in Chinese). CEA. August 30, 2008. Retrieved September 8, 2008.
  9. ↑ "Roughly: Sequence of Renhe-Huili earthquakes (仁和-会理地震序列目录)" (in Chinese). Sichuan Earthquake Administration (四川防震减灾信息网, SCEA). September 2, 2008. Archived from the original on September 8, 2008. Retrieved September 8, 2008.
  10. 1 2 "Roughly: Renhe-Huili M6.1 earthquake not directly related to Great Wenchuan earthquake (仁和-会理6.1级地震与汶川大地震无直接关系)" (in Chinese). Sichuan Earthquake Administration (四川防震减灾信息网, SCEA). September 1, 2008. Archived from the original on September 5, 2008. Retrieved September 8, 2008.
  11. ↑ "Roughly: A M5.6 earthquake struck the border of Panzhihua and Huili, Sichuan on 31st at 16:31 (31日16时31分四川攀枝花市仁和区、凉山彝族自治州会理县交界发生5.6级地震)" (in Chinese). CEA. August 31, 2008. Retrieved September 7, 2008.
  12. ↑ "Roughly: A M5.6 earthquake struck the border of Renhe-Huili (仁和-会理交界发生5.6级地震)" (in Chinese). Sichuan Earthquake Administration (四川防震减灾信息网, SCEA). August 31, 2008. Archived from the original on March 28, 2009. Retrieved September 7, 2008.
  13. ↑ "Magnitude 5.6 - SICHUAN-YUNNAN BORDER REGION, CHINA". USGS. August 30, 2008. Archived from the original on September 2, 2008. Retrieved September 1, 2008.
  14. 1 2 "China rushes troops to quake zone as toll rises". Yahoo! News. September 1, 2008. Retrieved September 1, 2008.
  15. ↑ "Roughly: A M3.0 earthquake struck the border of Renhe-Huili (仁和-会理交界发生3.0级地震)" (in Chinese). Sichuan Earthquake Administration (四川防震减灾信息网, SCEA). August 30, 2008. Archived from the original on March 28, 2009. Retrieved September 7, 2008. Reported epicenter was Lat.26.3, Long.101.9.
  16. ↑ "Roughly: Part III of emergency response to the M6.1 earthquake at the border of Renhe-Huili, Sichuan: Seismic tectonic background (四川攀枝花市仁和区-凉山州会理县交界6.1级地震现场应急工作系列报道之三地震构造背景)" (in Chinese). SCEA. September 2, 2008. Archived from the original on September 9, 2008. Retrieved September 7, 2008.
  17. ↑ "Roughly: CEA quickly launches seismic monitoring and emergency response to the M6.1 Panzhihua earthquake (中国地震局迅速部署四川攀枝花市6.1级地震震情监视跟踪和应急处置工作)" (in Chinese). CEA. August 30, 2008. Retrieved September 8, 2008.
  18. ↑ "China earthquake death toll rises". BBC. September 1, 2008. Archived from the original on September 1, 2008. Retrieved September 1, 2008.
  19. ↑ "Roughly: CEA decides to launch Level III emergency response procedure (中国地震局启动地震应急预案Ⅲ级应急响应决定)" (in Chinese). CEA. August 30, 2008. Archived from the original on September 9, 2008. Retrieved September 7, 2008.
  20. ↑ "Roughly: Seismic Intensity Map for the M6.1 earthquake near the border of Renhe, Panzhihua and Huili, Liangshan (四川省攀枝花市仁和区、凉山彝族自治州会理县交界 6.1级地震烈度分布图)" (in Chinese). September 18, 2008. Archived from the original on September 21, 2008. Retrieved September 20, 2008.

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