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2000 Yunnan earthquake

From Wikipedia, the free encyclopedia

2000 Yunnan earthquake
UTC time2000-01-14 23:37:07
ISC event1884945
USGS-ANSSComCat
Local dateJanuary 15, 2000 (2000-01-15)
Local time07:37:07 CST
Magnitude5.9 Mw
Epicenter25°37′N 101°04′E / 25.61°N 101.06°E / 25.61; 101.06
TypeStrike-slip
Areas affectedChina
Casualties7 killed
2,528 injured
92,479 displaced

The 2000 Yunnan earthquake occurred on January 14 at 23:37 UTC, in Yunnan, China. The earthquake killed 7 people, and caused much damage in central Yunnan Province.

The quake was moderate, with a magnitude of 5.9; however, it left 2,528 injured, 92,479 homeless and destroyed over 41,000 homes.[1]

It was preceded by a magnitude 5.5 foreshock at 22:09 on the same day.

Tectonic setting

Yunnan lies within the area affected by the continuing collision between the India Plate and the Eurasian Plate that has led to the formation of the Tibetan Plateau. Lateral eastward spreading of this zone of thickened crust is impeded by the presence of the South China Block and this causes clockwise rotation of the Sichuan–Yunnan block, accommodated by left-lateral strike-slip faults on its eastern margin and right lateral strike-slip faults to the west.[2]

Earthquake

The earthquake sequence started with two foreshocks at 22:09 (M5.5) and 22:23 (M3.9) on January 14.[3] The mainshock, which occurred soon afterwards at 23:37, had an estimated magnitude of 5.9 Mw  (ANSS), 6.0 Mw  or 6.5 Ms.[4] It was followed within the hour by a 4.5 Mw  aftershock.

Based on the aftershock distribution, the earthquake was the result of rupture along a fault with a strike of N50°W. The causative fault was most likely the right lateral Maweiqing fault, one of the faults that forms the western boundary of the Sichuan-Yunnan block.[4][2]

See also

References

  1. ^ "Today In Earthquake History: January 14". USGS. 2008-07-16. Retrieved 2008-11-05.
  2. ^ a b Qu, W.; Zhang, B.; Lu, Z.; Kim, J.W.; Zhang, Q.; Gao, M.; Hao, M.; Zhu, W.; Qu, F. (2019). "Source Parameter Estimation of the 2009 Ms6.0 Yao'an Earthquake, Southern China, Using InSAR Observations". Remote Sensing. 11 (4): 462. doi:10.3390/rs11040462.
  3. ^ ANSS. "Search results". Retrieved March 29, 2020.
  4. ^ a b Qin, J.; Ye, J.; Qian, X.; Li, B.; Wang, S. (2003). "Source Parameters of the 2000 Yao'an Earthquakes". Chinese Journal of Geophysics. 46 (5). doi:10.1002/cjg2.411.

External links


This page was last edited on 17 October 2020, at 22:26
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