Thursday, August 4, 1977 at 10:11 AM
1977-08-04 01:11 UTC · -56.013°, -27.788°
Magnitude
6.1 mb
Major
Depth
112 km
Intermediate
Energy
21.3 kilotons of TNT
Gutenberg–Richter
Coordinates
-56.013°, -27.788°
Felt reports
—
Tsunami
No
Source
USGS
Region
—
Can cause serious damage over larger areas.
At 112 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 Major range of the moment magnitude scale.
Nearest mapped structure: Cotabato Trench (~13817 km away).
Area seismic-hazard score: 8/100 (low).
9 recorded M4.0+ events within 294 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.