Wikipedia

List of earthquakes in South Africa

The following is a list of notable earthquakes or tremors that have been detected within South Africa.

USGS seismicity map for South Africa

According to Professor Andrzej Kijko from the University of Pretoria's Natural Hazard Centre, mining can activate natural faults. He believes that 95% of South Africa's earthquakes are caused by mining, especially around the areas of Klerksdorp, Welkom and Carletonville. According to earth science consultant Dr Chris Hartnady, "This part of Africa is in the vicinity of the African Rift system, which is being pulled apart by a few millimetres annually." He says "earthquakes are caused by a slip on a fault line and the release of stored elastic energy" and mining activity can trigger earthquakes.[1]

Earthquake data

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For earthquakes prior to the modern era, the magnitude and epicentre location are only approximate, and were calculated based on available reports from the time. The magnitude where given is measured using the Richter scale ( ) unless stated otherwise.

20th and 21st century

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Date Time (SAST) Epicentre Region   Depth Deaths Notes
29 September 1969 Near Tulbagh Western Cape 6.3 12[2] The 1969 Tulbagh earthquake remains the most destructive earthquake in South African history. The earthquake occurred in the Tulbagh area and measured 6.3 on the Richter scale, stronger than that of the 1809 Cape Town earthquake which destroyed a local Milnerton farm.[3][4]
14 April 1970 Tulbagh-Ceres-Wolseley area Western Cape 5.7 Second quake[5]
8 December 1976 Welkom Free State 5.2 4 Miners.[6]
26 September 1990 Welkom Free State 4.2 2[6]
9 March 2005 Stilfontein, North West 5.3 2 Miners were killed underground.[7][8]
28 May 2013 Near Mbabane Eswatini 4.0 The earthquake was felt in Newcastle and lasted about six seconds.[9]
22 June 2013 07:08 Thabazimbi Limpopo 3.9 9 km The earthquake was felt up in the Thabazimbi area.[10]
7 July 2013 16:52 Barberton Mpumalanga 4.7 5 km The earthquake was felt in the Barberton area.[11]
11 November 2013 University of Johannesburg, Johannesburg Gauteng 4.0 The earthquake was felt as far as parts of northern and southern Johannesburg and lasted for around 10–15 seconds.[12]
2 December 2013 21:18 ~25 km south of Bela-Bela Limpopo 4.8 5 km The earthquake was felt as far as Parkhurst and Randburg in Johannesburg, Hartebeespoort Dam in North West, Witbank and KwaMhlanga in Mpumalanga, and Soshanguve near Pretoria.[13][14]
15 June 2014 18:16 Near Orkney North West 4.9 5 km The earthquake was felt up to Potchefstroom.[15]
5 August 2014 12:22 Near Orkney North West 5.5 5.0 km The earthquake was felt as far as parts of Botswana and Durban, it lasted for around 90 sec. The local Council for Geoscience measured the earthquake at 5.5 on the Richter scale, while the United States Geological Survey (USGS) recorded a moment magnitude of 5.4.[16][17][18][19]
22 August 2014 1:14 Near Orange Farm Gauteng 3.8 10 km The second earthquake in South Africa in less than three weeks.[20] No reports of injuries.[21]

The Council for Geoscience (CGS) in South Africa reported an earthquake of 3.8 with two aftershocks occurring within minutes of each other of 3.2 and 2.0 respectively.[22]

31 October 2019 13:20 Near Port Shepstone KwaZulu-Natal 4.3 10 km The CGS reported an earthquake of a preliminary value of 3.7 on the local magnitude scale. However, the USGS has it logged as 4.3[23][24]
26 September 2020 19:10 1600 km SE of South Africa Western Cape 6.1 10 km USGS report.[25]

Mistakenly reported to have been felt in Cape Town. See below earthquake.

26 September 2020 20:41 12 km W of Paarl Western Cape 2.7 5 km Felt by residents in Cape Town area. CGS report.[26] USGS report.[27]
27 September 2020 09:12 Durbanville Area, Cape Town Western Cape 2.6 5 km Felt by residents in Cape Town area. CGS report.[28] USGS report.[29]
17 November 2020 00:27 41 km S of Saldanha Western Cape 3.5 5 km Felt by residents in Cape Town area. CGS report.[30] USGS report.[31]
30 July 2021 06:30 Johannesburg Gauteng 3.6 10 km Felt by residents in Johannesburg. CGS report. USGS report.[32]
5 November 2022 14:32 23 km from Umvoti Local Municipality KwaZulu-Natal 4.6 9 km Felt by residents in Durban area.
11 June 2023 02:38 2 kilometers from Alberton. Gauteng 5.0 10 km Felt by residents across the city of Johannesburg and the region as a whole.[33]

See also

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References

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  1. ^ Hosken, Graeme; Smillie, Shaun; Child, Katharine; Louw, Poppy; Masombuka, Sipho (6 August 2014). "Quake of shaky things to come". Times LIVE. Archived from the original on 19 August 2014. Retrieved 6 August 2014.
  2. ^ Durrheim, Ray (15 October 2019). "50 years on: What we learned from South Africa's biggest quake". University of the Witwatersrand. Retrieved 16 November 2020.
  3. ^ Shevel, Adele (10 August 2014). "Insurers brace for a wave of quake claims". Business Day. Archived from the original on 19 August 2014. Retrieved 15 August 2014.
  4. ^ "Ceres earthquake". 9 March 2014. Archived from the original on 27 April 2012. Retrieved 9 March 2014.
  5. ^ "We've learnt a great deal since South Africa's biggest quake 50 years ago". 22 September 2019.
  6. ^ a b Seale, Lebogang (14 August 2014). "Quake triggered by mine activity – expert". The Star. Archived from the original on 14 August 2014. Retrieved 14 August 2014.
  7. ^ "Media Update: 5.5 magnitude earthquake – tremors continue". Council for Geoscience. Archived from the original on 14 August 2014. Retrieved 14 August 2014.
  8. ^ le Cordeur, Matthew (6 August 2014). "Did mining cause SA quake?". Fin24. Archived from the original on 12 August 2014. Retrieved 14 August 2014.
  9. ^ "Tremor hits northern KZN". IOL. 29 May 2012. Retrieved 4 December 2013.
  10. ^ "3.9 magnitude earthquake 15 km from Thabazimbi, Limpopo, South Africa". Earthquake Track. 22 June 2013. Retrieved 22 June 2013.
  11. ^ "4.7 magnitude earthquake 49 km from Barberton, Mpumalanga, South Africa". Earthquake Track. 7 July 2013. Retrieved 7 July 2013.
  12. ^ "Earth tremor felt in Joburg". IOL. 18 November 2013. Retrieved 4 December 2013.
  13. ^ "Tremor strikes near Bela Bela". IOL. 3 December 2013. Retrieved 4 December 2013.
  14. ^ "4.8 magnitude earthquake 40 km from Siyabuswa, Mpumalanga, South Africa". Earthquake Track. 2 December 2013. Retrieved 2 December 2013.
  15. ^ "4.9 magnitude earthquake 7 km from Orkney, North-West, South Africa". Earthquake Track. 15 June 2014. Retrieved 15 June 2014.
  16. ^ Tempelhoff, Elise; Cilliers, Susan (6 August 2014). "Só skeur Afrika (stadig) in twee" [Thus Africa tears (slowly) in two]. Beeld (in Afrikaans). Archived from the original on 10 August 2014. Retrieved 6 August 2014.
  17. ^ "Aardbewing van 5.3 ruk SA, berigte van skade (twiets)" [Earthquake of 5.3 shakes SA, reports of damage (tweets)]. Beeld (in Afrikaans). 5 August 2014. Archived from the original on 6 August 2014. Retrieved 5 August 2014.
  18. ^ "M5.4 – 3 km ENE of Orkney, South Africa". United States Geological Survey. Archived from the original on 8 August 2014. Retrieved 16 October 2014.
  19. ^ "5.4 magnitude earthquake 4 km from Orkney, North-West, South Africa". Earthquake Track. 5 August 2014. Retrieved 14 August 2014.
  20. ^ "4.6 magnitude earthquake hits west of Orange Farm". 22 August 2014.
  21. ^ "No injuries after 4.6 magnitude quake". 22 August 2014.
  22. ^ "Three earthquakes hit the Carletonville area early in the morning". 22 August 2014. Archived from the original on 25 May 2015. Retrieved 22 August 2014.
  23. ^ "Statement on the Seismic Event That Occurred in the KZN Area". 1 November 2019.
  24. ^ "M 4.3 - 44 km NW of Port Shepstone, South Africa". 31 October 2019.
  25. ^ "M 6.1 - South of Africa". United States Geological Survey. Retrieved 17 November 2020.
  26. ^ "CGS Earthquake Detail - M2.7 - Cape Town".
  27. ^ "M 2.7 - 12 km W of Paarl, South Africa". United States Geological Survey. Retrieved 17 November 2020.
  28. ^ "CGS Earthquake Detail - M2.5 - Cape Town".
  29. ^ "M 2.6 - 19 km ESE of Atlantis, South Africa". United States Geological Survey. Retrieved 17 November 2020.
  30. ^ "CGS Earthquake Detail - M3.4 Saldanha, South Africa".
  31. ^ "M 3.5 - 41 km S of Saldanha, South Africa". United States Geological Survey. Retrieved 17 November 2020.
  32. ^ "Tremor: 3.6 magnitude quake rattles Johannesburg on Friday". The Citizen. 30 July 2021. Retrieved 30 July 2021.
  33. ^ "Moderate Earthquake Hits Johannesburg, South Africa". BNO News. 10 June 2023. Retrieved 11 June 2023.
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