2021 Dali earthquake

2021 Dali earthquake
UTC time	2021-05-21 13:48:37
ISC event	620436007
USGS-ANSS	ComCat
Local date	2021-05-21
Local time	21:48 (China Standard Time)
Magnitude	6.1 Mw
Depth	10.0 km (6.2 mi)
Epicenter	25°45′40″N 100°00′29″E / 25.761°N 100.008°ECoordinates: 25°45′40″N 100°00′29″E / 25.761°N 100.008°E
Fault	Red River Fault
Type	Strike-slip
Areas affected	Dali City, Yunnan, China
Max. intensity	VIII (Severe)
Foreshocks	Mw  5.2
Aftershocks	27 above Mw 4.0 (Strongest is 5.1 Mw )
Casualties	3 dead, 32 injured

On May 21, 2021, a 6.1 magnitude earthquake strucked the Dali City, Yunnan, China, at a depth of 10.0 km.^[7] Three people died during the quake, while another 32 were injured.^[5]^[6] The earthquake was referred by the Chinese media as the 5.21 earthquake or 2021 Yangbi earthquake.

Tectonic setting[]

Yunnan lies at the southeastern boundary of the Tibetan Plateau where strike-slip faults accommodate crustal rotation resulting from deformation caused by the ongoing collision between the Indian Plate and the Eurasian Plate which formed the Himalayas and the Tibetan Plateau. The presence of active faults make the region prone to moderate to large earthquakes. Major events in Yunnan Province have occurred in 1833, 1974, 1976, 1988 and 2014. The nearest active faults in Dali City are the Xiaojiang Fault and Red River Fault.^{[citation needed]} The Red River Fault caused two deadly earthquakes in 1925 near Dali and another in 1970 in Tonghai county.^[8]

Earthquake[]

The earthquake was the result of strike-slip faulting at a shallow depth. It had a maximum intensity of VIII (Severe) on the Mercalli intensity scale.^[7] According to the United States Geological Survey (USGS), the earthquake had a moment magnitude of 6.1 while the China Earthquake Networks Center (CENC) and China Earthquake Administration (CEA) measured the earthquake at 6.4 on the surface-wave magnitude scale.^[9] The depth of focus is reported to be 10 km by the USGS and 8 km by the CEA.

Several hours later, an unrelated Mw 7.3 earthquake struck Southern Qinghai province that was felt in the area. ^[10]

Casualties[]

Two fatalities were reported in Yangbi County while another three suffered serious injuries. One of the victims, a truck driver, was killed as a result of a rockfall while another woman in a trapped vehicle had leg injuries.^[11] A total of 26 people in the county were injured.^[6] In Yongping County, the earthquake killed one person, and left another injured.^[12] A 28th injury was reported in Dali City.^[13] On May 22, a press release said the number of people injured was brought to 32, with seven in serious condition.^[4] Five of the seven who are seriously injured suffered trauma to the head and chest, as well as bone fractures.

Damage[]

The earthquake damaged some 12,882 homes in Yangbi County.^[6]

References[]

^ "M 5.2 - 22 km WNW of Dali, China".
^ "USGS earthquake catalog".
^ "M 5.1 - 24 km WNW of Dali, China".
^ Jump up to: ^a ^b "云南漾濞6.4级地震致3死32伤抗震救灾工作有序进行" (in Chinese). Xinhua News Agency. 22 May 2021. Retrieved 27 May 2021.
^ Jump up to: ^a ^b "Two people died in the magnitude 6.4 earthquake in Yangbi, Yunnan" (in Chinese). Xinhua Net. 21 May 2021. Retrieved 21 May 2021.
^ Jump up to: ^a ^b ^c ^d Qian Zhongbing, ed. (21 May 2021). "1 dead and 22 injured in the Yangbi earthquake in Yunnan" (in Chinese). Xinhua Net. Retrieved 21 May 2021.
^ Jump up to: ^a ^b "M 6.1 - 28 km NW of Dali, China". United States Geological Survey. 21 May 2021. Retrieved 21 May 2021.
^ Zhao Yuhe; Yang Xiu Dazhen; Lu Xueli (22 May 2021). "揪心！雲南、青海兩地深夜發生強震，已有傷亡" (in Chinese). Beijing Sina.com. Retrieved 22 May 2021.
^ China Earthquake Administration. "A magnitude 6.4 earthquake occurred in Yangbi County, Dali Prefecture, Yunnan Province at 21:48 on May 21". cea.gov.cn. China Earthquake Administration. Retrieved 21 May 2021.
^ "M 7.4 - Southern Qinghai, China". earthquake.usgs.gov. Retrieved 21 May 2021.
^ Zhang Qi (22 May 2021). "In the Dali earthquake in Yunnan, a truck driver was hit by a rolling stone and killed, and 6 others were injured" (in Chinese). Chutian Metropolis Daily News. Retrieved 22 May 2021.
^ "云南大理州漾濞地震已致3人死亡，28人受伤" (in Chinese). Sohu. 22 May 2021. Retrieved 22 May 2021.
^ CCTV News (21 May 2021). Zhou Zijing (ed.). "The magnitude 6.4 earthquake in Yangbi, Yunnan has killed 3 people and injured 27". The Paper. Retrieved 21 May 2021.

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[1] "M 5.2 - 22 km WNW of Dali, China".

[2] "USGS earthquake catalog".

[3] "M 5.1 - 24 km WNW of Dali, China".

[Update_22-4] Jump up to: ^a ^b "云南漾濞6.4级地震致3死32伤抗震救灾工作有序进行" (in Chinese). Xinhua News Agency. 22 May 2021. Retrieved 27 May 2021.

[First_report.-5] Jump up to: ^a ^b "Two people died in the magnitude 6.4 earthquake in Yangbi, Yunnan" (in Chinese). Xinhua Net. 21 May 2021. Retrieved 21 May 2021.

[2nd_report-6] Jump up to: ^a ^b ^c ^d Qian Zhongbing, ed. (21 May 2021). "1 dead and 22 injured in the Yangbi earthquake in Yunnan" (in Chinese). Xinhua Net. Retrieved 21 May 2021.

[ANSS-7] Jump up to: ^a ^b "M 6.1 - 28 km NW of Dali, China". United States Geological Survey. 21 May 2021. Retrieved 21 May 2021.

[8] Zhao Yuhe; Yang Xiu Dazhen; Lu Xueli (22 May 2021). "揪心！雲南、青海兩地深夜發生強震，已有傷亡" (in Chinese). Beijing Sina.com. Retrieved 22 May 2021.

[9] China Earthquake Administration. "A magnitude 6.4 earthquake occurred in Yangbi County, Dali Prefecture, Yunnan Province at 21:48 on May 21". cea.gov.cn. China Earthquake Administration. Retrieved 21 May 2021.

[10] "M 7.4 - Southern Qinghai, China". earthquake.usgs.gov. Retrieved 21 May 2021.

[11] Zhang Qi (22 May 2021). "In the Dali earthquake in Yunnan, a truck driver was hit by a rolling stone and killed, and 6 others were injured" (in Chinese). Chutian Metropolis Daily News. Retrieved 22 May 2021.

[12] "云南大理州漾濞地震已致3人死亡，28人受伤" (in Chinese). Sohu. 22 May 2021. Retrieved 22 May 2021.

[Latest_report_3-13] CCTV News (21 May 2021). Zhou Zijing (ed.). "The magnitude 6.4 earthquake in Yangbi, Yunnan has killed 3 people and injured 27". The Paper. Retrieved 21 May 2021.

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show v t ← Earthquakes in 2021
January	West Sulawesi, Indonesia (6.2, Jan 14) † Talaud Islands, Indonesia (7.0, Jan 21)
February	Mindanao, Philippines (6.0, Feb 7) Loyalty Islands, France (7.7, Feb 10) Fukushima, Japan (7.1, Feb 13)
March	Antioquia, Colombia (5.1, Mar 1) Larissa, Greece (6.3, Mar 3) Gisborne, New Zealand (7.3, Mar 4) Kermadec Islands, New Zealand (7.4 & 8.1, Mar 4) Miyagi, Japan (7.0, Mar 20)
April	East Java, Indonesia (6.0, Apr 10) Assam, India (6.0, Apr 28)
May	Yunnan, China (6.1, May 21) Qinghai, China (7.3, May 21)
June	Mala, Peru (5.8, June 23)
July	Antelope Valley, California (6.0, July 8) Chignik, Alaska (8.2, July 29)
August	Davao Oriental, Philippines (7.1, Aug 12) South Sandwich Islands (7.5 & 8.1, Aug 12) Nippes, Haiti (7.2, Aug 14) † ‡
September	Guerrero, Mexico (7.0, Sep 7)
† indicates earthquake resulting in at least 30 deaths ‡ indicates the deadliest earthquake of the year Dates for all earthquakes are in UTC

show v t Earthquakes in China
Historical	1290 Chihli (Inner Mongolia) 1303 Hongdong 1556 Shaanxi 1605 Guangdong 1679 Beijing 1668 Shandong 1739 Ningxia 1786 Kangding-Luding, Sichuan 1833 Kunming 1879 Gansu
20th century	1902 Kashgar, Xinjiang 1906 Manas, Xinjiang 1918 Shantou, Guangdong 1920 Haiyuan, Ningxia 1925 Dali, Yunnan 1927 Gulang, Gansu 1931 Fuyun, Xinjiang 1932 Changma 1933 Diexi, Sichuan 1947 Assam 1948 Litang, Sichuan 1950 Assam – Tibet 1955 Yuzha, Sichuan 1966 Xingtai, Hebei 1969 Bohai Sea 1969 Yangjiang, Guangdong 1970 Tonghai, Yunnan 1973 Luhuo, Sichuan 1974 Zhaotong, Yunnan 1975 Haicheng, Liaoning 1976 Longling, Yunnan 1976 Tangshan, Hebei 1976 Songpan–Pingwu, Sichuan 1981 Dawu, Sichuan 1985 Luquan, Yunnan 1985 Wuqia, Xinjiang 1988 Lancang, Yunnan 1990 Gonghe, Qinghai 1994 Taiwan Strait 1995 Menglian, Yunnan 1995 Wuding, Yunnan 1996 Lijiang, Yunnan 1996 Baotou, Inner Mongolia 1997 Jiashi, Xinjiang 1997 Manyi, Tibet 1998 Ninglang, Yunnan 2000 Yunnan
21st century	2001 Kunlun 2003 Bachu, Xinjiang 2003 Zhaosu, Xinjiang 2005 Ruichang, Jiangxi 2006 Yanjin, Yunnan 2008 Sichuan 2008 Yingjiang, Yunnan 2008 Panzhihua, Sichuan 2008 Damxung, Tibet 2009 Xinjiang 2009 Yunnan 2010 Yushu, Qinghai 2011 Yunnan 2011 Myanmar 2012 Yangzhou, Jiangsu 2012 Zhaotong, Yunnan 2013 Lushan, Sichuan 2013 Dingxi, Gansu 2014 Yutian, Xinjiang 2014 Yingjiang, Yunnan 2014 Ludian, Yunnan 2014 Jinggu, Yunnan 2014 Kangding, Sichuan 2015 Pishan, Xinjiang 2017 Jiuzhaigou, Sichuan 2017 Jinghe, Xinjiang 2019 Changning, Sichuan 2020 Kashgar, Xinjiang 2020 Qiaojia, Yunnan 2021 Dali, Yunnan 2021 Maduo, Qinghai
By province	Sichuan Yunnan
Organizations	China Meteorological Administration China Earthquake Administration China Earthquake Networks Center China Geological Survey China International Search and Rescue Team