Thursday, October 20, 1977 at 9:16 PM
1977-10-20 13:16 UTC · 2.429°, 128.419°
Magnitude
5.5 mb
Strong
Depth
76 km
Intermediate
Energy
2.7 kilotons of TNT
Gutenberg–Richter
Coordinates
2.429°, 128.419°
Felt reports
—
Tsunami
No
Source
USGS
Region
—
Can cause damage to buildings and infrastructure near the epicentre.
At 76 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: Philippine Trench (~304 km away). Last major event: 2012 Samar Earthquake (M7.6).
Area seismic-hazard score: 8/100 (low).
3 recorded M4.0+ events within 270 km in the 90 days after this earthquake.
Data from USGS. Magnitudes and locations are preliminary and may be revised. For official information consult PHIVOLCS / USGS.