M5.5 earthquake 98 km NNW of Hihifo, Tonga
A magnitude 5.5 earthquake struck 98 km NNW of Hihifo, Tonga on Tue, Oct 18, 1966, 11:27 AM GMT-11 (22:27 UTC), 75 km (47 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.5 (mw), moderate
- Local time
- UTC
- 1966-10-18 22:27:31 UTC
- Depth
- 75.0 km (46.6 mi), intermediate-depth
- Epicenter
- 15.094° S, 174.040° 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
- ±0.34
- 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 iscgem842623. Read Tue, Sep 22, 2026, 8:41 AM UTC.