Saturday, September 17, 1977 at 5:20 PM
1977-09-17 08:20 UTC · -56.531°, -25.745°
Magnitude
5.6 mb
Strong
Depth
82 km
Intermediate
Energy
3.8 kilotons of TNT
Gutenberg–Richter
Coordinates
-56.531°, -25.745°
Felt reports
—
Tsunami
No
Source
USGS
Region
—
Can cause damage to buildings and infrastructure near the epicentre.
At 82 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: Cotabato Trench (~13697 km away).
Area seismic-hazard score: 8/100 (low).
9 recorded M4.0+ events within 274 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.