Posted by on Thursday, June 23, 2016
On November 18, 1929 an earthquake with a magnitude of 7.2 struck off the south coast of Newfoundland in the Laurentian Slope Seismic Zone.
The earthquake triggered a tsunami with waves as high as 13 metres crashing into the Burin Peninsula.
The tsunami destroyed many south coastal communities on the Peninsula, killing 27 or 28 people and leaving 10,000 or more homeless. All communication was cut off by the destruction, and relief efforts were further hampered by a blizzard that struck the day after.
On the islands of Saint Pierre and Miquelon, the tsunami reached the island of Saint-Pierre, submerging the docks. There was also damage in the south, rising above the height of the south bank that protects the south coast, flooding the lower part of the island. It damaged and moved some of the houses.
A large undersea earthquake may be felt prior to tsunami by an ongoing shaking of the ground in coastal regions. However, you may not feel an earthquake if the source is far away. If you see the ocean drop it may be a sign of a tsunami. As tsunami approach the shoreline, the sea level may, but not always, recede/drop dramatically before returning as a fast-moving wall of water. You may hear an unusual roaring sound. A roaring sound may precede the arrival of tsunami.