1948 Litang earthquake
| UTC time | 1948-05-25 07:11:34 |
|---|---|
| ISC event | 897351 |
| USGS-ANSS | ComCat |
| Local date | May 25, 1948 |
| Local time | 15:11:34 |
| Magnitude | Mw 7.2[1] |
| Depth | 18 km |
| Epicenter | 29°30′N 100°30′E / 29.5°N 100.5°E[1] |
| Areas affected | China |
| Max. intensity | MMI X (Extreme) |
| Casualties | 800 |
The 1948 Litang earthquake (Chinese: 1948年理塘地震; pinyin: 1948nián Lǐtángdìzhèn) occurred on May 25, 1948, at 07:11 UTC. It was located near Litang, China. Now situated in the Sichuan Province, Litang County was then called Lihua (or Lihwa) (理化) County and belonged to the defunct Xikang (or Sikang) Province. The earthquake had a magnitude of Mw 7.2,[1] or Ms 7.3.[2]
This earthquake caused more than 800 deaths. More than 600 houses collapsed in the areas around Litang and Daocheng. Landslides, ground fissures and sandblows occurred in the region. The intensity of the earthquake reached MM X.[2] Some of the aftershocks caused additional damage.[3]
The earthquake occurred in the middle segment between Litang and Dewu (德巫) of the Litang-Dewu fault zone (理塘-德巫断裂带).[4] Litang Fault, situated in the Sichuan-Yunnan rhombic block (川滇菱形块体), is a NW-trending fault and dominated mainly by left-lateral shear movement. The average horizontal slip rate of the Litang Fault is about 3.2 to 4.4 mm/yr on the Litang-Dewu segment and about 2.6 to 3.0 mm/yr on the segment to the north of Litang.[5] A study of Wang et al. estimated that the Litang fault has a left-lateral strike-slip rate of 4.4±1.3 mm/yr and an extension rate of 2.7±1.1 mm/yr.[6] The focal mechanism was recognized to be a left-lateral slip on a plane striking northwest (315°) for a distance of about 75 km. The released seismic moment was estimated to be about 7.4×1019 Nm.[7]
See also
References
- ^ a b c Engdahl, E. R.; Vallaseñor, A. (2002). "Global seismicity: 1900–1999" (PDF). International Handbook of Earthquake & Engineering Seismology. Part A, Volume 81A (First ed.). Academic Press. p. 679. ISBN 978-0124406520.
- ^ a b National Geophysical Data Center / World Data Service (NGDC/WDS) (1972), Significant Earthquake Database (Data Set), National Geophysical Data Center, NOAA, doi:10.7289/V5TD9V7K, archived from the original on September 29, 2006
- ^ "Today in Earthquake History". United States Geological Survey.
- ^ Cheng, W. "1986年8月7日四川省理塘5.6级地震 (August 7 , 1986 : A 5.6 magnitude earthquake struck Litang, Sichuan Province)". China Earthquake Networks Center. Archived from the original on 2016-03-04. Retrieved 2012-09-12.
- ^ Zhou, R.J.; Chen, G.X.; Li, Y.; Zhou, Z.H.; Li, X.G. (2005). "Research on active faults in Litang–Batang region, western Sichuan province, and the seismogenic structures of the 1989 Batang M 6.7 earthquake swarm". Seismol.Geol. 27 (1): 31–43.
- ^ Wang, Y.; Wang, E.; Shen, Z.; Wang., N.; Gan, W.; Qiao, X.; Meng, G.; Li, T.; Tao, W.; Yang, Y.; Cheng, J.; Li, P. (2008). "GPS-constrained inversion of present-day slip rates along major faults of the Sichuan-Yunnan region, China". Science in China Series D: Earth Sciences. 51: 1267–1283. doi:10.1007/s11430-008-0106-4.
- ^ Molnar, P.; Qidong, D. "Faulting associated with large earthquakes and the average rate of deformation in central and eastern Asia" (PDF). Journal of Geophysical Research. 89 (B7): 6203–6227. doi:10.1029/JB089iB07p06203. Archived from the original (PDF) on 2017-08-23. Retrieved 2020-05-16.
External links
- The International Seismological Centre has a bibliography and/or authoritative data for this event.