Sunday, November 21, 1971 at 1:57 PM
1971-11-21 05:57 UTC ยท -11.885ยฐ, 166.573ยฐ
Magnitude
7.1 mw
Great
Depth
110 km
Intermediate
Energy
673.6 kilotons of TNT
GutenbergโRichter
Coordinates
-11.885ยฐ, 166.573ยฐ
Felt reports
โ
Tsunami
No
Source
USGS
Region
โ
Can cause severe, widespread destruction and loss of life.
At 110 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 Great range of the moment magnitude scale.
Nearest mapped structure: Philippine Trench (~4711 km away). Last major event: 2012 Samar Earthquake (M7.6).
Area seismic-hazard score: 8/100 (low).
10 recorded M4.0+ events within 334 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.