Friday, October 12, 1956 at 12:48 AM
1956-10-11 16:48 UTC · 40.422°, -126.090°
Magnitude
6.4 mw
Major
Depth
10 km
Shallow
Energy
56.0 kilotons of TNT
Gutenberg–Richter
Coordinates
40.422°, -126.090°
Felt reports
—
Tsunami
No
Source
USGS
Region
—
Can cause serious damage over larger areas.
At 10 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 (~10551 km away). Last major event: 1934 Manila Trench Earthquake.
Area seismic-hazard score: 8/100 (low).
Data from USGS. Magnitudes and locations are preliminary and may be revised. For official information consult PHIVOLCS / USGS.