1976 Songpan–Pingwu earthquake
UTC time | Triplet earthquake: |
---|---|
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 [1] | |
C: 11:33 [2] | |
Magnitude | |
A: 6.7 Mw, 7.0 Ms[3] | |
B: 6.3 Mw, 6.6 Ms[4] | |
C: 6.4 Mw, 6.7 Ms[5] | |
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 [6] |
Fault | Huya[7] |
Type | Reverse and left-lateral [7] |
Areas affected | Songpan and Pingwu, Sichuan |
Max. intensity | MMI VII (Very strong)[8] |
Foreshocks | Three year swarm |
Casualties | 38 dead, 800 injured |
The 1976 Songpan–Pingwu earthquake that struck Songpan and Pingwu counties in Sichuan, China consisted of three mainshocks on the 16th, 21st, and 23rd (UTC) of August. A 1984 report gave the magnitudes as 7.2, 6.7, and 7.2, respectively (scale not specified).[7] The magnitudes were subsequently recalculated as 6.7, 6.3, and 6.4 on the Mw scale, and 7.0, 6.6, and 6.7 on the Ms scale.[9] These were preceded by an earthquake swarm lasting three years. During the period from August 16 to August 31 there were over 400 aftershocks of magnitude 3.0 or greater.[10]
Short term earthquake warning were issued 3 months before the earthquake.
See also
- 1976 Tangshan earthquake (July 27/28)
- 1976 Longling earthquake (May 29)
- List of earthquakes in 1976
- List of earthquakes in China
- List of earthquakes in Sichuan
Notes
- ^ a b Jones et al. 1984, p. 7700.
- ^ Jones et al. 1984, p. 7701.
- ^ ISC-EHB Event 709871 [IRIS].
- ^ ISC-EHB Event 710167 [IRIS].
- ^ ISC-EHB Event 710223 [IRIS].
- ^ ISC-GEM Event 709781 [IRIS].
- ^ a b c Jones et al. 1984, p. 7697.
- ^ ANSS: Sichuan 1976a .
- ^ ISC-EHB Event 709871 [IRIS]. ISC-EHB Event 710167 [IRIS]. ISC-EHB Event 710223 [IRIS].
- ^ Jones et al. 1984, p. 7698
- ^ a b "Past successful Chinese earthquake predictions". Liaoning Earthquake Administration.[date missing][author missing]
- ^ Xinhua News Agency. "Earthquake with scale 6 or higher Since 1976". China Earthquake Administration. [date missing][author missing]
- ^ "30th anniversary of the Songpan–Pingwu earthquake". Sichuan Earthquake Administration. Archived from the original on 2013-11-27. Retrieved 2018-10-14.[date missing][author missing]
Sources
- ANSS, "Sichuan 1976a: M 6.9 - Sichuan-Gansu border region, China", Comprehensive Catalog, U.S. Geological Survey
- ANSS, "Sichuan 1976b: M 6.4 - Sichuan-Gansu border region, China", Comprehensive Catalog, U.S. Geological Survey
- ANSS, "Sichuan 1976c: M 6.7 - Sichuan-Gansu border region, China", Comprehensive Catalog, U.S. Geological Survey
- International Seismological Centre, ISC-EHB Bulletin, Thatcham, United Kingdom
- International Seismological Centre, ISC-GEM Global Instrumental Earthquake Catalogue, Thatcham, United Kingdom
- .
External links
- The International Seismological Centre has a bibliography and/or authoritative data for this event.