Earthquake early-warning systems
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The initial warning that permits you to take evasive action

The network warning that extends the response time.
BE INFORMED, BE WARNED, BE PREPARED: BEFORE, DURING and AFTER an EARTHQUAKE
EARTHQUAKES IN B.C.

WHAT CAUSES EARTHQUAKES

INTENSITY & MAGNITUDE

MERCALLI SCALE

RICHTER SCALE

WHERE DO
EARTHQUAKES OCCUR?

MEGATHRUST EARTHQUAKE?

WHAT ARE THE EFFECTS?

MINIMIZING THE RISK!

BEING PREPARED

Earthquakes in British Columbia 1946

1946/06/23

49.8N 125.3W

7.3

Central Vancouver Island. Crustal earthquake, very few aftershocks. Much damage in central Vancouver Island, and slight damage in the Lower Mainland. Felt strongly all over Vancouver Island, throughout the lower mainland.

Vancouver Island's largest historic earthquake (and Canada's largest historic onshore earthquake) was a magnitude 7.3 event that occurred at 10:15 a.m. on Sunday June 23, 1946. The epicentre was in the Forbidden Plateau area of central Vancouver Island, just to the west of the communities of Courtenay and Campbell River.

This earthquake caused considerable damage on Vancouver Island, and was felt as far away as Portland Oregon, and Prince Rupert B.C. The earthquake knocked down 75% of the chimneys in the closest communities, Cumberland, Union Bay, and Courtenay and did considerable damage in Comox, Port Alberni, and Powell River (on the eastern side of Georgia Strait). A number of chimneys were shaken down in Victoria and people in Victoria and Vancouver were frightened - many running into the streets. Two deaths resulted from this earthquake, one due to drowning when a small boat capsized in an earthquake-generated wave, and the other from a heart attack in Seattle.

Copyright: Alex Makarow 1998 - Revised 04/11/00