M5.9 earthquake 186 km NW of Hihifo, Tonga
A magnitude 5.9 earthquake struck 186 km NW of Hihifo, Tonga on Tue, Oct 8, 1968, 4:38 PM GMT-11 (03:38 UTC), 15 km (9 mi) below the surface.
A larger quake followed: M6.4 211 km WNW of Hihifo, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.9 (mw), moderate
- Local time
- UTC
- 1968-10-09 03:38:43 UTC
- Depth
- 15.0 km (9.3 mi), shallow
- Epicenter
- 14.962° S, 175.200° 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
- ±0.20
- 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: 1 in the 60 days after this one and 3 in the 30 days before it.
After
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem815748. Read Tue, Sep 22, 2026, 7:22 AM UTC.