Tuesday, December 20, 1977 at 4:50 PM
1977-12-20 08:50 UTC · 48.590°, 153.015°
Magnitude
5.8 mb
Strong
Depth
140 km
Intermediate
Energy
7.6 kilotons of TNT
Gutenberg–Richter
Coordinates
48.590°, 153.015°
Felt reports
—
Tsunami
No
Source
USGS
Region
—
Can cause damage to buildings and infrastructure near the epicentre.
At 140 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: Manila Trench (~4212 km away). Last major event: 1934 Manila Trench Earthquake.
Area seismic-hazard score: 8/100 (low).
8 recorded M4.0+ events within 282 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.