Saturday, March 21, 1987 at 6:41 PM
1987-03-21 10:41 UTC · 52.056°, -177.547°
Magnitude
6.4 mw
Major
Depth
93 km
Intermediate
Energy
60.0 kilotons of TNT
Gutenberg–Richter
Coordinates
52.056°, -177.547°
Felt reports
—
Tsunami
No
Source
USGS
Region
—
Can cause serious damage over larger areas.
At 93 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: Manila Trench (~6498 km away). Last major event: 1934 Manila Trench Earthquake.
Area seismic-hazard score: 8/100 (low).
12 recorded M4.0+ events within 306 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.