Thursday, October 20, 1977 at 11:08 AM
1977-10-20 03:08 UTC · 4.558°, 124.734°
Magnitude
4.9 mb
Moderate
Depth
418 km
Deep
Energy
338 tons of TNT
Gutenberg–Richter
Coordinates
4.558°, 124.734°
Felt reports
—
Tsunami
No
Source
USGS
Region
Mindanao
Felt widely; can cause minor damage to weak structures.
At 418 km this was a deep earthquake. Deep quakes are felt over very large areas but rarely cause surface damage.
This event sits in the Moderate range of the moment magnitude scale.
Nearest mapped structure: Cotabato Trench (~80 km away).
Area seismic-hazard score: 29/100 (moderate).
Data from USGS. Magnitudes and locations are preliminary and may be revised. For official information consult PHIVOLCS / USGS.