M6.3 earthquake 80 km SSE of ‘Ohonua, Tonga
A magnitude 6.3 earthquake struck 80 km SSE of ‘Ohonua, Tonga on Thu, Oct 31, 1963, 4:17 PM GMT+13 (03:17 UTC), 17 km (10 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
- 1963-10-31 03:17:42 UTC
- Depth
- 16.5 km (10.3 mi), shallow
- Epicenter
- 22.050° S, 174.797° W
- Region
- Tonga
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
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 3.3 and up: 2 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem873450. Read Thu, Sep 24, 2026, 1:10 PM UTC.