Friday, September 21, 1984 at 5:29 PM
1984-09-21 09:29 UTC · 34.003°, 141.507°
Magnitude
5.7 mw
Strong
Depth
40 km
Shallow
Energy
5.4 kilotons of TNT
Gutenberg–Richter
Coordinates
34.003°, 141.507°
Felt reports
—
Tsunami
No
Source
USGS
Region
—
Can cause damage to buildings and infrastructure near the epicentre.
At 40 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 Strong range of the moment magnitude scale.
Nearest mapped structure: Manila Trench (~2572 km away). Last major event: 1934 Manila Trench Earthquake.
Area seismic-hazard score: 8/100 (low).
5 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.