Sunday, February 22, 1981 at 7:23 AM
1981-02-21 23:23 UTC · 36.399°, 140.516°
Magnitude
5.0 mb
Strong
Depth
73 km
Intermediate
Energy
477 tons of TNT
Gutenberg–Richter
Coordinates
36.399°, 140.516°
Felt reports
—
Tsunami
No
Source
USGS
Region
—
Can cause damage to buildings and infrastructure near the epicentre.
At 73 km this was a intermediate earthquake. Intermediate-depth quakes spread shaking over a wider area but are usually less destructive at the surface.
This event sits in the Strong range of the moment magnitude scale.
Nearest mapped structure: Manila Trench (~2621 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.