1997 Manyi earthquake

1997 Manyi earthquake

Date	November 8, 1997
Origin time	10:02 UTC
Magnitude	7.4 Mw
Depth	15 km (9.3 mi)[1]
Epicenter	35°04′08″N 87°19′30″E / 35.069°N 87.325°E
Type	Strike-slip
Areas affected	China

The 1997 Manyi earthquake (玛尼地震) occurred on November 8 at 10:02 UTC.^[2] The epicenter was in Nagqu Prefecture (那曲地區) in northern Tibet, China. The focal mechanism indicates a lift-lateral strike-slip movement. This earthquake had a surface rupture of 17 km (11 mi) long with up to 7 m (23 ft) of left-lateral slip along the Manyi fault, a westward continuation of the Kunlun fault, offset about 100 km (62 mi) to the south.^[3] Normally, the continental crust is about 35 km (22 mi) thick, but it reaches 70 km (43 mi) thick under the Tibetan Plateau. This earthquake ruptured up to 20 km (12 mi) of the top part of the local continental crust.^[4]

References

1. Peltzer, G.; Crampe, F.; King, G. (1999), "Evidence of nonlinear elasticity of the crust from the Mw7.6 Manyi (Tibet) earthquake" (PDF), Science (American Association for the Advancement of Science) 286 (5438): 272–276, doi:10.1126/science.286.5438.272
2. USGS, Significant Earthquakes of the World, United States Geological Survey
3. Washburn, Z.; Arrosmith, J. Ramon; Dupont-Nivet, G.; Xiao Feng, W.; Yu Qiao, Z.; Zhengle, C. (2003), "Paleoseismology of the Xorxol segment of the central Altyn Tagh Fault, Xinjiang, China" (PDF), Annals of Geophysics (Istituto Nazionale Geofisica e Vulcanologia) 46 (5): 1015–1034
4. Burgmann, R.; Dresen, G. (2008), "Rheology of the Lower Crust and Upper Mantle: Evidence from Rock Mechanics, Geodesy, and Field Observations" (PDF), Annual Review of Earth and Planetary Sciences (Annual Reviews) 36: 546, doi:10.1146/annurev.earth.36.031207.124326