Saturday, May 21, 1977 at 2:35 PM
1977-05-21 05:35 UTC · 15.699°, 120.820°
Magnitude
5.7 mb
Strong
Depth
189 km
Intermediate
Energy
5.4 kilotons of TNT
Gutenberg–Richter
Coordinates
15.699°, 120.820°
Felt reports
—
Tsunami
No
Source
USGS
Region
Luzon
Can cause damage to buildings and infrastructure near the epicentre.
At 189 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: Digdig Fault (~28 km away). Last major event: 1990 Luzon Earthquake (M7.8).
Area seismic-hazard score: 100/100 (very high).
18 recorded M4.0+ events within 278 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.