1929 Grand Banks earthquake
1929 CE.
Shown on the map at 44.500°, -57.250°.
The 1929 Grand Banks earthquake (also called the Laurentian Slope earthquake and the South Shore Disaster) occurred on November 18, 1929. The shock had a moment magnitude of 7.2 and a maximum Rossi–Forel intensity of VI (Strong tremor) and was centered in the Atlantic Ocean off the south coast of Newfoundland in the Laurentian Slope seismic zone.
Text from the Wikipedia article 1929 Grand Banks earthquake, licensed CC BY-SA 4.0.