An earthquake of magnitude 5.2 occurred on February 25, 2010 at 04:56:51 ( UTC ) in the Chinese province of Yunnan , 88.7 km northwest of Anning and its suburbs . The earthquake hypocenter was located at a depth of 10.0 kilometers [3] . An earthquake was felt in Kunming City [4] .
| Yunnan Earthquake (February 2010) | |
|---|---|
 | |
| date of and time | 02/25/2010 04:56:51 ( UTC ) |
| Magnitude | 5.2 Mw [1] |
| Depth hypocenter | 10.0 km [1] |
| Location epicenter | |
| Affected countries (regions) |  China |
| Tsunami | no |
| Injured | 35 wounded [2] |
| Economic damage | US $ 51.94 million [2] |
| Aftershocks | no |
Content
- 1 Tectonic conditions of the region
- 2 Consequences
- 3 notes
- 4 Literature
Tectonic conditions of the region
Seismicity in the Himalayas is mainly due to the continental collision of the tectonic plates of India and Eurasia , which converge at a relative speed of 40-50 mm per year. Subduction of the Hindustan Plate under the Eurasian Plate causes numerous earthquakes and, therefore, makes this area one of the most seismically dangerous regions on Earth. On the surface, this subduction zone is expressed by the foothills of the Suleyman mountains in the west, the Indo-Burmese arc in the east and the Himalayas in northern India [3] .
In the west of China is the Tibetan plateau , whose average height is more than 4000 meters above sea level. Yunnan-Guizhou plateau is a southeastern extension of the Tibetan plateau [5] .
The global tectonics are based on the movement of lithospheric plates, including the Chinese continental plate. The collision of India and Eurasia in the Paleogene led to the creation of the Himalayas and the Tibetan plateau. Some orogenes in the northwestern part of China, such as the Central Tien Shan and the Arjin Mountains, are actually huge fault zones that were rejuvenated as a result of a collision. Fragments of faults and blocks that make up the zones of deep faults are previously consolidated fragments of the surrounding orogen tectonic structures [5] .
The Yunnan-Malayan Early Cimmerian fold-folding system extends through the western part of the Chinese province of Yunnan and the extreme east of Myanmar to northwestern Laos and central part of Thailand , covering further the Malay Peninsula , except for its extreme northwestern part, and the islands of Bangka and Biliton (Malaya) . The western limitation of the system is the Sinobirmania massif, the eastern - in the north, the South China (Yangtze) platform , and in the south the Indosinan massif. In the interval between them from the Yunnan-Malay system, the Lao-Vietnamese folded-cover system of north-western strike branches to the connection with the West Pacific mobile belt [6] .
The seismicity and focal mechanism of earthquakes in the Jinchuan basin in western Yunnan province show that the basin formed mainly in the form of a normal fault parallel to the eastern edge of the basin. Similar basins in this region, as a rule, are elongated in the north-south direction and are limited by normal north-south faults and multidirectional faults or faults extending from the north-east with a right-handed shift from the north-west. An analysis of Landsat satellite images over this area shows that these faults divide western Yunnan into many blocks. The relative motion of the blocks corresponds to the north-south compression stress and the east-west extension [7] .
Consequences
The earthquake affected 35 people [2] (according to other sources 11) [4] . In Yunnan, residential buildings were damaged [4] [8] [9] . Economic damage amounted to about 51.94 million US dollars [2] .
Notes
- ↑ 1 2 “M 5.2 - Yunnan, China” . earthquake.usgs.gov. Date of treatment June 2, 2019.
- ↑ 1 2 3 4 James Daniell. Damaging Earthquakes Database. 2010 - The Year in Review . Australian Earthquake Engineering Society (January 14, 2011).
- ↑ 1 2 “M 5.2 - Yunnan, China” . earthquake.usgs.gov. Date of treatment June 2, 2019.
- ↑ 1 2 3 “M 5.2 - Yunnan, China” . earthquake.usgs.gov. Date of treatment June 2, 2019.
- ↑ 1 2 Oleg Yakupov. Geology of China | Tectonics of China | The deep structure of China . www.virtualuppermantle.info. Date of appeal April 26, 2019.
- ↑ Lao-Vietnamese and Yunnan-Malay Early Cimmerian folded cover systems . www.catalogmineralov.ru. Date of appeal April 26, 2019.
- ↑ Peide Wang, Francis T. Wu. Tectonics of western Yunnan Province, China (Eng.) // Geology. - 1988-02-01. - Vol. 16 , iss. 2 . - P. 153-157 . - ISSN 0091-7613 . - DOI : 10.1130 / 0091-7613 (1988) 0162.3.CO; 2 .
- ↑ 简讯 ： 云南 楚雄 发生 5.1 级 地震 (unopened) . BBC News 中文. Date of treatment June 1, 2019.
- ↑ 中国 云南 地震 23 人 受伤 - 大纪元 ( unopened ) . 大纪元 www.epochtimes.com (February 26, 2010). Date of treatment June 1, 2019.
Literature
- USGS Open-File Report 2010‒1083 – J: Seismicity of the Earth 1900‒2010 Himalaya and Vicinity . pubs.usgs.gov. Date of appeal April 25, 2019.
- Rock stress and earthquakes: proceedings of the Fifth International Symposium on In-situ Rock Stress, Beijing, China, August 25-27, 2010 . - Leiden: CRC Press / Balkema, 2010 .-- 1 online resource (xvi, 877 pages) p. - ISBN 9780203836101 , 0203836103, 9781136861154, 1136861157, 9781136861192, 113686119X, 9781136861208, 1136861203.
- Xiao-feng Cui, Fu-ren Xie, Hong-yan Zhang. Recent tectonic stress field zoning in Sichuan-Yunnan region and its dynamic interest ( Act .) // Acta Seismologica Sinica. - 2006-09-01. - Vol. 19 , iss. 5 . - P. 485–496 . - ISSN 1000-9116 . - DOI : 10.1007 / s11589-006-0501-x .
- L. Zhao, Y. Luo, T.-Y. Liu, Y.-J. Luo. Earthquake Focal Mechanisms in Yunnan and their Inference on the Regional Stress Field (Eng.) // Bulletin of the Seismological Society of America. - 2013-08-01. - Vol. 103 , iss. 4 . - P. 2498-2507 . - ISSN 0037-1106 . - DOI : 10.1785 / 0120120309 .
- BC Burchfiel, Zhiliang Chen. Tectonics of the Southeastern Tibetan Plateau and Its Adjacent Foreland . - Geological Society of America, 2012-01-01. - 242 p. - ISBN 9780813712109 .
- Tianfeng Wan. The Tectonics of China: Data, Maps and Evolution . - Springer Science & Business Media, 2012-01-19. - 508 s. - ISBN 9783642118685 .