Robben Island
The 1620 Robben island earthquake is widely accepted as the oldest recorded earthquake in South African history. It reportedly occurred on 7 April 1620 off Robben Island, with a Mercalli intensity of II–IV ("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.