M7.3 earthquake 195 km E of Biak, Indonesia
A magnitude 7.3 earthquake struck 195 km E of Biak, Indonesia on Wed, Apr 2, 1947, 3:09 PM GMT+9:30 (05:39 UTC), 15 km (9 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 7.3 (mw), major
- Local time
- UTC
- 1947-04-02 05:39:16 UTC
- Depth
- 15.0 km (9.3 mi), shallow
- Epicenter
- 1.102° S, 137.839° E
- Region
- Indonesia
- Strongest shaking
- VII, very strong shaking
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Shaking
The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.
- Strongest estimated
- VII, very strong shaking
- Peak ground acceleration
- 23.2% of gravity
- Peak ground velocity
- 3.3 cm/s
- Map
- Automatic
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Magnitude uncertainty
- ±0.40
- Depth from
- From location
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.5 and up: 0 in the 60 days after this one and 0 in the 30 days before it.
None recorded.
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem897799. Read Tue, Sep 22, 2026, 4:04 PM UTC.