1976 Songpan–Pingwu earthquake

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1976 Songpan–Pingwu earthquake
1976 Songpan–Pingwu earthquake is located in China
1976 Songpan–Pingwu earthquake
UTC time  
  A: 1976-08-16 14:06:46
  B: 1976-08-21 21:49:53
  C: 1976-08-23 03:30:07
ISC event  
  A: 709871
  B: 710167
  C: 710223
USGS-ANSS  
  A: ComCat
  B: ComCat
  C: ComCat
Local date August 16, 22, and 23
Local time  
  A: 22:06 [1]
  B: 05:49 [2]
  C: 11:33 [3]
Magnitude  
  A: 6.7 Mw, 7.0 Ms[4]
  B: 6.3 Mw, 6.6 Ms[5]
  C: 6.4 Mw, 6.7 Ms[6]
Depth A: 8 km (5 mi)
B: 15 km (9 mi)
C: 19 km (12 mi)
Epicenter 32°41′N 104°12′E / 32.69°N 104.2°E / 32.69; 104.2Coordinates: 32°41′N 104°12′E / 32.69°N 104.2°E / 32.69; 104.2 [7]
Fault Huya[8]
Type Reverse and left-lateral [9]
Areas affected Songpan and Pingwu, Sichuan
Max. intensity VII[10]
Foreshocks Three year swarm

The 1976 Songpan–Pingwu earthquake struck Songpan and Pingwu in Sichuan, China. The earthquake was preceded by an earthquake swarm lasting three years. The mainshock occurred on August 16 at 14:06:47 UTC with a magnitude of 6.7 Mw. Several large aftershocks (6.3 and 6.4 Mw) occurred within several days. During the period from August 16 to August 30, following the mainshock, there were over 400 aftershocks that were recorded with a magnitude greater than or equal to 3.0.[11]

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