1983 Guinea earthquake

1983 Guinea earthquake
UTC time	1983-12-22 04:11:29
ISC event	563420
USGS-ANSS	ComCat
Local date	December 22, 1983
Local time	04:11
Magnitude	6.3 Mw
Depth	11.3 km (7 mi)
Epicenter	11.866°N 13.529°W
Type	Oblique – Normal
Casualties	300 dead, 1,500 injured, 200 missing

On December 22, 1983 an earthquake with a magnitude of 6.3 struck northern Guinea, killing around 300 people, and injuring 1,500. Around 200 people went missing. An earthquake of this magnitude was unusual for this region of West Africa, which was previously believed by most seismologists to be aseismic.[1] The earthquake destroyed 5,000 houses. It had an intensity of IX (Violent) on the Mercalli intensity scale,[1] although USGS reported it as VIII (Severe)[2] The earthquake caused cracks in the ground, and an entire cavern to collapse.[1]

Shakemap of the earthquake

Geology

The earthquake occurred on the edge of the Paleozoic Bové Basin, near the western margin of the Precambrian West African Craton and close to the southern end of the late Proterozoic to Hercynian Mauritanide Belt.[3]

References

Langer, C. J.; Bollinger, G. A. (1992). Natural Hazards in West and Central Africa. International Monograph Series. Vieweg+Teubner Verlag, Wiesbaden. pp. 31–36. doi:10.1007/978-3-663-05239-5_4. ISBN 9783663052418.
"M 6.3 - Guinea". earthquake.usgs.gov. Retrieved 2018-01-12.
Dorbath, C.; Dorbath, L.; Gaulon, R.; George, T.; Mourgue, P.; Ramdani, M.; Robineau, B.; Tadili, B. (1984). "Seismotectonics of the Guinean Earthquake of December 22, 1983". Geophysical Research Letters. 11 (10): 971–974. Bibcode:1984GeoRL..11..971D. doi:10.1029/GL011i010p00971.

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[Langer_1992-1] Langer, C. J.; Bollinger, G. A. (1992). Natural Hazards in West and Central Africa. International Monograph Series. Vieweg+Teubner Verlag, Wiesbaden. pp. 31–36. doi:10.1007/978-3-663-05239-5_4. ISBN 9783663052418.

[2] "M 6.3 - Guinea". earthquake.usgs.gov. Retrieved 2018-01-12.

[Dorbath_etal_1984-3] Dorbath, C.; Dorbath, L.; Gaulon, R.; George, T.; Mourgue, P.; Ramdani, M.; Robineau, B.; Tadili, B. (1984). "Seismotectonics of the Guinean Earthquake of December 22, 1983". Geophysical Research Letters. 11 (10): 971–974. Bibcode:1984GeoRL..11..971D. doi:10.1029/GL011i010p00971.