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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, making it the biggest earthquake in South Africa since the 1969 Tulbagh earthquake, which had a magnitude of 6.3 on the Richter scale. The United States Geological Survey (USGS) estimated a focal depth of . 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. According to the CGS, the earthquake is the biggest mining-related earthquake in South African history. Cause Historical seismicity While earthquakes are uncommon in South Africa in general, the earthquake occurred in a mining belt where earthquakes are relatively common. The CGS had described a 2005 earthquake with a magnitude of 5.3 o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Time In South Africa
South African Standard Time (SAST) is the time zone used by all of South Africa as well as Eswatini and Lesotho. The zone is two hours ahead of UTC ( UTC+02:00) and is the same as Central Africa Time. Daylight saving time is not observed in either time zone. Solar noon in this time zone occurs at 30° E in SAST, effectively making Pietermaritzburg at the correct solar noon point, with Johannesburg and Pretoria slightly west at 28° E and Durban slightly east at 31° E. Thus, most of South Africa's population experience true solar noon at approximately 12:00 daily. The western Northern Cape and Western Cape differ, however. Everywhere on land west of 22°30′ E effectively experiences year-round daylight saving time because of its location in true UTC+01:00 but still being in South African Standard Time. Sunrise and sunset are thus relatively late in Cape Town, compared to the rest of the country. To illustrate, daylight hours for South Africa's western a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1969 Tulbagh Earthquake
The 1969 Tulbagh earthquake occurred at 20:03:33 UTC on 29 September. It had a magnitude of 6.3 and a maximum felt intensity of VIII (''Severe'') on the Modified Mercalli intensity scale. It caused widespread damage in the towns of Ceres, Tulbagh and Wolseley and led to 12 deaths. The earthquake was a result of strike-slip faulting along a NW-SE trending near vertical fault plane, as shown by the focal mechanism and the distribution of aftershocks. Tectonic setting The Western Cape lies on the Cape Fold Belt, which is characterised by many thrust faults. Some of these thrust faults were reactivated during Cretaceous rifting as extensional faults, such as the Worcester Fault, which comes to the surface close to the epicentral area, but does not appear to be active. Earthquake The earthquake was estimated to have a magnitude of 6.3 . The ISC-GEM catalogue records it as 6.3 . The focal mechanism shows that the earthquake was a result of strike-slip faulting, either sinistral mov ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Station Orkney NW
Station may refer to: Agriculture * Station (Australian agriculture), a large Australian landholding used for livestock production * Station (New Zealand agriculture) A station or run, in the context of New Zealand agriculture, is a large farm dedicated to the grazing of sheep and cattle. The use of the word for the farm or farm buildings date back to the mid-nineteenth century. The owner of a station is call ..., a large New Zealand farm used for grazing by sheep and cattle ** Cattle station, a cattle-rearing station in Australia or New Zealand **Sheep station, a sheep-rearing station in Australia or New Zealand Communications * Radio communication station, a radio frequency communication station of any kind, including audio, TV, and non-broadcast uses ** Radio broadcasting station, an audio station intended for reception by the general public ** Amateur radio station, a station operating on frequencies allocated for ham or other non-commercial use ** Broadcast relay station ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
