1580 Dover Straits earthquake
1580 CE.
Shown on the map at 50.500°, 2.330°.
Though severe earthquakes in Britain and northern France are rare, the 1580 Dover Straits earthquake appears to have been one of the largest in the recorded history of England, Flanders or northern France. Its effects started to be felt in London at around six o'clock in the evening of 6 April 1580, being Wednesday in the Easter week.
Text from the Wikipedia article 1580 Dover Straits earthquake, licensed CC BY-SA 4.0.