M4.5 earthquake 174 km SW of Vaini, Tonga
A magnitude 4.5 earthquake struck 174 km SW of Vaini, Tonga on Wed, Oct 22, 1986, 7:27 PM GMT+13 (06:27 UTC), 390 km (242 mi) below the surface.
A larger quake followed: M7.2 157 km WSW of Haveluloto, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.5 (mb), light
- Local time
- UTC
- 1986-10-22 06:27:45 UTC
- Depth
- 389.8 km (242.2 mi), deep
- Epicenter
- 22.303° S, 176.375° 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.
- Depth from
- FROM_LOCATION
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 3 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 usp0002z7h. Read Tue, Sep 29, 2026, 11:30 PM UTC.