Wednesday, July 31, 1968 at 4:38 AM
1968-07-30 20:38 UTC · -6.993°, -80.468°
Magnitude
6.3 mw
Major
Depth
28 km
Shallow
Energy
45.5 kilotons of TNT
Gutenberg–Richter
Coordinates
-6.993°, -80.468°
Felt reports
—
Tsunami
No
Source
USGS
Region
—
Can cause serious damage over larger areas.
At 28 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 Major range of the moment magnitude scale.
Nearest mapped structure: Philippine Trench (~16979 km away). Last major event: 2012 Samar Earthquake (M7.6).
Area seismic-hazard score: 8/100 (low).
1 recorded M4.0+ event within 303 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.