Thursday, February 1, 2018

2014 Orkney earthquake

The 2014 Orkney earthquake occurred at 12:22:33 SAST on 5 August, with the epicentre near Orkney, a gold mining town in the Klerksdorp district in the North West province of South Africa. The shock was assigned a magnitude of 5.5 on the Richter scale by the Council for Geoscience (CGS) in South Africa,[2][8][9]making it the biggest earthquake in South Africa since the 1969 Tulbagh earthquake,[10] which had a magnitude of 6.3 on the Richter scale.[11] The United States Geological Survey (USGS) estimated a focal depth of 5.0 km (3.1 mi).[1] According to the USGS, the earthquake was "severely dangerous" as the epicentre was located near Orkney and Klerksdorp.[12] The CGS reported 84 aftershocks on 5 August and 31 aftershocks on 6 August, with a magnitude of 1.0 to 3.8 on the Richter scale.[5] According to the CGS, the earthquake is the biggest mining-related earthquake in South African history.[3]
2014 Orkney earthquake
ShakeMap Orkney 5 August 2014.jpg
USGS ShakeMap illustrating the intensity of the earthquake
2014 Orkney earthquake is located in South Africa
Orkney
Orkney
Date5 August 2014
Origin time12:22:33 SAST (UTC+02:00)[1]
Magnitude5.5 ML[2]
Depth5.0 km (3.1 mi)[1][3]
Epicenter26.9717°S 26.7094°E[1]
Areas affectedSouth Africa, also felt in BotswanaSwazilandLesotho and Mozambique
Max. intensityVI (Strong)[1]
Foreshocks4.9 MW at 16:16:25 SAST on 15 June 2014[4]
Aftershocks3.8 ML at 16:58:42 SAST on 5 August 2014[5]
Casualties
1 dead[6]
34 injured[6][7]

Cause

Impact

Response

See also

References

External links

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