Sunday, October 23, 1977 at 1:57 AM
1977-10-22 17:57 UTC · -27.952°, -62.972°
Magnitude
6.1 mb
Major
Depth
614 km
Deep
Energy
21.3 kilotons of TNT
Gutenberg–Richter
Coordinates
-27.952°, -62.972°
Felt reports
—
Tsunami
No
Source
USGS
Region
—
Can cause serious damage over larger areas.
At 614 km this was a deep earthquake. Deep quakes are felt over very large areas but rarely cause surface damage.
This event sits in the Major range of the moment magnitude scale.
Nearest mapped structure: Philippine Trench (~17357 km away). Last major event: 2012 Samar Earthquake (M7.6).
Area seismic-hazard score: 8/100 (low).
1 recorded M4.0+ event within 294 km in the 90 days after this earthquake.
No other recent earthquakes nearby.
Browse all earthquakes →Data from USGS. Magnitudes and locations are preliminary and may be revised. For official information consult PHIVOLCS / USGS.