M4.8 earthquake 64 km WSW of Neiafu, Tonga
A magnitude 4.8 earthquake struck 64 km WSW of Neiafu, Tonga on Wed, Apr 30, 1986, 4:17 AM GMT+13 (15:17 UTC), 176 km (110 mi) below the surface.
A larger quake followed: M5.2 36 km NNE of Pangai, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.8 (mb), light
- Local time
- UTC
- 1986-04-29 15:17:51 UTC
- Depth
- 176.3 km (109.5 mi), intermediate-depth
- Epicenter
- 18.774° S, 174.579° 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
- CONSTRAINED_BY_DEPTH_PHASES
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.8 and up: 2 in the 60 days after this one and 1 in the 30 days before it.
After
- 5.236 km NNE of Pangai, Tonga · 14734 days ago · 110 km deep · 94 km away
- 4.7102 km NW of Neiafu, Tonga · 14722 days ago · 33 km deep · 96 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002tbf. Read Tue, Sep 22, 2026, 7:22 AM UTC.