Sunday, April 5, 1964 at 1:59 AM
1964-04-04 17:59 UTC ยท 56.338ยฐ, -154.493ยฐ
Magnitude
6.5 mw
Major
Depth
23 km
Shallow
Energy
81.9 kilotons of TNT
GutenbergโRichter
Coordinates
56.338ยฐ, -154.493ยฐ
Felt reports
โ
Tsunami
No
Source
USGS
Region
โ
Can cause serious damage over larger areas.
At 23 km this was a shallow earthquake. Shallow quakes concentrate shaking near the epicentre and tend to be the most damaging.
This event sits in the Major range of the moment magnitude scale.
Nearest mapped structure: Manila Trench (~7987 km away). Last major event: 1934 Manila Trench Earthquake.
Area seismic-hazard score: 8/100 (low).
20 recorded M4.0+ events within 310 km in the 90 days after this earthquake.
No other recent earthquakes nearby.
Browse all earthquakes โData from USGS. Magnitudes and locations are preliminary and may be revised. For official information consult PHIVOLCS / USGS.