9.2mw
Great Alaska Earthquake
Sensitivity zones:
strong — up to 450 km
moderate — up to 1125 km
weak — up to 2500 km
About this earthquake
The strongest earthquake in North American history and the second strongest ever recorded. Shaking in Anchorage lasted about 4.5 minutes. Most victims were killed not by the shaking but by tsunamis that struck the coasts of Alaska, Oregon and California.
Sensitivity zones
Approximate radii, derived from magnitude and hypocentre depth, within which shaking is typically felt:
- strong — up to 450 km
- moderate — up to 1125 km
- weak — up to 2500 km
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