1620 Robben Island earthquake

1620 South Africa Earthquake July 2024 October 2024 The 1620 Robben island earthquake is widely accepted as the oldest recorded earthquake in South African history.Practice of Earthquake Hazard Assessment 9 March 1993 https://books.google.com/books?id=RwslFK0L_8YC&pg=PA218 DIANE Publishing 978-0-7881-1592-9 218 It reportedly occurred on 7 April 1620, off Robben Island, with a Mercalli intensity of IIIV (Weak–Light). The event was observed by Augustin de Beaulieu, who was leading a fleet of three ships on Table Bay at the time, who recorded "two startling thunderclaps like cannon shots while ship was becalmed near Robben Island" between 6:00 and 7:00.The Earthquake of 29 September 1969 in the southwestern Cape Province, South Africa https://books.google.com/books?id=mBhOAQAAIAAJ 1974 Geological Survey, Dept. of Mines, Republic of South Africa 13 In 2012, Sharad Master of the South African Journal of Science has disputed the accuracy of the recording of the event, concluding that the thunderclaps were very likely atmospheric phenomena. He argues that it was the slight quake which occurred off Cape Town in 1690 which is actually the oldest recorded one in South Africa which can be verified, of Mercalli intensity III.Master, Sharad http://www.sajs.co.za/oldest-%E2%80%98earthquake%E2%80%99-south-africa-robben-island-07-april-1620-discredited/master-sharad Oldest 'earthquake' in South Africa (Robben Island, 07 April 1620) discredited South African Journal of Science 15 May 2015 https://web.archive.org/web/20150416061648/http://sajs.co.za/oldest-%E2%80%98earthquake%E2%80%99-south-africa-robben-island-07-april-1620-discredited/master-sharad 16 April 2015 dead References -33.810 18.352 type:event_globe:earth_region:ZA title Category:Earthquakes in South Africa Category:1620 disasters Category:1620s earthquakes Category:1620s in South Africa Category:Robben Island Category:Organised events in Cape Town