Saturday, March 19, 1977 at 5:43 AM
1977-03-18 21:43 UTC ยท 16.773ยฐ, 122.327ยฐ
Magnitude
7.0 ms
Great
Depth
37 km
Shallow
Energy
476.9 kilotons of TNT
GutenbergโRichter
Coordinates
16.773ยฐ, 122.327ยฐ
Felt reports
โ
Tsunami
No
Source
USGS
Region
Luzon
Can cause severe, widespread destruction and loss of life.
At 37 km this was a shallow earthquake. Shallow quakes concentrate shaking near the epicentre and tend to be the most damaging.
This event sits in the Great range of the moment magnitude scale.
Nearest mapped structure: Philippine Fault Zone (~36 km away). Last major event: 1990 Luzon Earthquake (M7.8).
Area seismic-hazard score: 69/100 (very high).
20 recorded M4.0+ events within 330 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.