Monday, September 21, 1931 at 10:20 AM
1931-09-21 02:20 UTC · 36.140°, 139.380°
Magnitude
6.5 mw
Major
Depth
15 km
Shallow
Energy
84.8 kilotons of TNT
Gutenberg–Richter
Coordinates
36.140°, 139.380°
Felt reports
—
Tsunami
No
Source
USGS
Region
—
Can cause serious damage over larger areas.
At 15 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 (~2519 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.