Sunday, August 21, 2011 at 2:19 AM
2011-08-20 18:19 UTC ยท -18.311ยฐ, 168.218ยฐ
Magnitude
7.1 mww
Great
Depth
28 km
Shallow
Energy
673.6 kilotons of TNT
GutenbergโRichter
Coordinates
-18.311ยฐ, 168.218ยฐ
Felt reports
23
โDid You Feel It?โ
Tsunami
No
Source
USGS
Region
โ
Can cause severe, widespread destruction and loss of life.
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 Great range of the moment magnitude scale.
Nearest mapped structure: Philippine Trench (~5161 km away). Last major event: 2012 Samar Earthquake (M7.6).
Area seismic-hazard score: 8/100 (low).
20 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.