Wednesday, August 5, 1981 at 3:15 AM
1981-08-04 19:15 UTC · 4.191°, 126.705°
Magnitude
4.9 mb
Moderate
Depth
61 km
Shallow
Energy
338 tons of TNT
Gutenberg–Richter
Coordinates
4.191°, 126.705°
Felt reports
—
Tsunami
No
Source
USGS
Region
Celebes Sea
Felt widely; can cause minor damage to weak structures.
At 61 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 Moderate range of the moment magnitude scale.
Nearest mapped structure: Philippine Trench (~126 km away). Last major event: 2012 Samar Earthquake (M7.6).
Area seismic-hazard score: 26/100 (moderate).
Data from USGS. Magnitudes and locations are preliminary and may be revised. For official information consult PHIVOLCS / USGS.