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Yunnan Quake Injures 300

Posted by feww on July 10, 2009

A Magnitude 5.7 Earthquake in China’s SW Yunnan Province Injures 300

A magnitude 5.7 earthquake in China’s southwestern Yunnan province, which was initially reported as a magnitude 5.5 shock by USGS, has reportedly toppled 10,000 homes, injuring more than 300 people.

[Note: The number of toppled building may have been exaggerated for political reasons.]

The moderate-to-strong quake struck at 19:19:17  [time at epicenter] yesterday in Guantun, a small town about 100 km (60 miles) ENE of Dali, Yunnan, China. Eight aftershocks measuring 3 to 4.1 on the Richter scale followed the mainshock.

10-degree Map Centered at 25°N,100°E

Earthquake Location. (Source: USGS)

Seismic Hazard Map


Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green (Source: USGS)

Historic Seismicity

history Seis
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green (Source: USGS)

Earthquake Details

  • Magnitude: 5.7
  • Date-Time
    • Thursday, July 09, 2009 at 11:19:17 UTC
    • Thursday, July 09, 2009 at 07:19:17 PM at epicenter
  • Location: 25.619°N, 101.086°E
  • Depth: 10 km (6.2 miles) set by location program
  • Region: YUNNAN, CHINA
  • Distances:
    • 100 km (60 miles) ENE of Dali, Yunnan, China
    • 120 km (75 miles) SSW of Panzhihua (Dukou), Sichuan, China
    • 695 km (430 miles) SW of Chongqing, Chongqing, China
    • 2130 km (1320 miles) SW of BEIJING, Beijing, China
  • Location Uncertainty: horizontal +/- 7.1 km (4.4 miles); depth fixed by location program
  • Parameters: NST= 89, Nph= 89, Dmin=975 km, Rmss=1.19 sec, Gp= 50°, M-type=centroid moment magnitude (Mw), Version=8
  • Source: USGS NEIC (WDCS-D)
  • Event ID: us2009iwar

According to China’s official Xinhua News Agency:

The quake occurred at 7:19 p.m., at a depth of about 10 kilometers, with the epicenter in the county’s Guantun Township, about 200 km from the provincial city of Kunming, said the China Earthquake Networks Center.

More than 300 people were injured and more than 10,000 houses collapsed in a 6.0-magnitude earthquake that hit southwest China’s Yunnan Province Thursday evening, local authorities said.

Among the victims, 30 suffered severe injuries while the other 305 were slightly injured as of 1 a.m., said the quake-relief headquarters in Yao’an County, Chuxiong Yi Autonomous Prefecture.

The headquarters previously put the number of injuries at 336, among whom 56 were severely injured.

More than 10,000 houses collapsed and more than 30,000 others were damaged in six counties in Chuxiong, according to the latest figure.

Last year’s magnitude 7.9 quake struck China’s Sichuan province, northeast of yesterday’s quake, killing up to 90,000 people [many of the victims were schoolkids studying at shoddily-built schools when the disaster occurred,] and destroying as many as 5 million structures that left millions homeless.

For detailed reports and reference on Sichuan quake see links below.

Related Links:

FEWW Earthquake Links

One Response to “Yunnan Quake Injures 300”

  1. feww said

    A magnitude 5 aftershock occurred today, July 10, 2009 at 09:02:04 UTC
    Location: 25.627°N, 100.949°E]
    Depth 10 km (6.2 miles)
    Region YUNNAN, CHINA
    + 85 km (55 miles) ENE of Dali, Yunnan, China
    + 130 km (80 miles) SW of Panzhihua (Dukou), Sichuan, China
    + 705 km (435 miles) SW of Chongqing, Chongqing, China
    + 2145 km (1330 miles) SW of BEIJING, Beijing, China
    Source: USGS NEIC (WDCS-D)
    Event ID: us2009ixaq

    Damage Report
    – Reports say one person was killed and 328 were injured, more than 35 of them seriously.
    – Some18,000 buildings were toppled and about 75,000 others damaged in Yao’an and five other counties.
    – More than 400,000 people in the quake zone need to be evacuated or relocated.
    – Damage estimate is put at $400 million so far

    Previous quakes in the Yunnan Province:

    UPDATED: 16:25, August 11, 2004
    Earthquake casualties reaches 600 in Yunnan

    Casualties of an earthquake in southwest China’s Yunnan province has reached approximately 600 by Wednesday noon, according to local sources.

    The quake measuring 5.6 on the Richter scale jolted Ludian county in Zhaotong city of Yunnan Tuesday night.

    According to Deng Xianpei, mayor of Zhaotong city, the quake has killed three locals, including two in Ludian county and one inZhaoyang district of Zhaotong city. A total of 594 people were injured, and 142 of them seriously.

    It was the third major quake that hit the Ludian county within a year. Two other quakes measuring 5.1 and 5.0 on the Richter scales struck the county on Nov. 15 and 26, 2003. Four people werekilled and 120 were injured in the two previous quakes.

    With a population of 370,000, Ludian county, located in the east of Yunnan province, is among China’s abject counties.
    Source: Xinhua

    Thursday, January 27, 2000, updated at 20:16(GMT+8)
    China Earthquake Hits Yunnan, But No Deaths

    An earthquake with a 5.5 magnitude struck south China’s Yunnan province early January 27 morning in the border area of Mile and Qiubei counties, resulting in no deaths and only two injuries.

    The local seismological bureau reported that some houses and roads in the remote area had sustained damage, but no further details were available because communication access to the region is limited.

    The 4.55 a.m. (2055 GMT Wednesday) tremor is unlikely to result in large economic losses as few people live in the area, said Que Yunchang, a spokesman with the bureau.

    The China Seismological Bureau said that the epicenter of the quake was located at 24.2 degrees north latitude and 103.6 degrees east longitude. The quake caused losses to 2,060 households there.

    Officials with the local electricity bureau said that there have been no signs of power outages.

    Six rescue groups have been sent to the quake-hit area, headed by Chen Xunru, deputy provincial governor.

    The lowest temperature in the area January 27 is predicted to be 1 to 2 degrees Celsius, and the meteorological station forecasts a possible moderate to heavy snowfall in the next two days, when temperatures are to drop to minus-2 degrees Celsius.

    The two counties, located in southwest part of the province, are situated in a mountainous area mostly inhabited by Miao, Zhuang, Hani and Yi ethnic groups.

    Two quakes with magnitudes of 5.9 and 6.5 struck Yao’an County in the province’s Chuxiong Yi Autonomous Prefecture on Jan. 15, killing five, injuring 1,544, and leaving more than 90,000 homeless. Copyright by People’s Daily Online, All rights reserved

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