M6.3 earthquake 234 km SSE of Sofifi, Indonesia
A magnitude 6.3 earthquake struck 234 km SSE of Sofifi, Indonesia on Tue, Apr 30, 1963, 10:28 AM GMT+9:30 (00:58 UTC), 35 km (22 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 6.3 (mw), strong
- Local time
- UTC
- 1963-04-30 00:58:22 UTC
- Depth
- 35.0 km (21.7 mi), shallow
- Epicenter
- 1.042° S, 128.706° E
- Region
- Indonesia
- Strongest shaking
- V, moderate 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
- V, moderate shaking
- Peak ground acceleration
- 6.1% of gravity
- Peak ground velocity
- 1.8 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
- ±0.20
- 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 4 in the 30 days before it.
Before
- 6.0196 km SSE of Sofifi, Indonesia · 23160 days ago · 29 km deep · 45 km away
- 5.7213 km N of Amahai, Indonesia · 23161 days ago · 35 km deep · 44 km away
- 7.1204 km SSE of Sofifi, Indonesia · 23171 days ago · 30 km deep · 74 km away
- 7.1197 km SSE of Sofifi, Indonesia · 23171 days ago · 30 km deep · 71 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem17293685. Read Tue, Sep 22, 2026, 9:49 PM UTC.