M4.2 earthquake 155 km W of Pangai, Tonga
A magnitude 4.2 earthquake struck 155 km W of Pangai, Tonga on Mon, Jun 23, 1986, 10:45 PM GMT+13 (09:45 UTC), 274 km (170 mi) below the surface.
A larger quake followed: M6.5 151 km NW of Nuku‘alofa, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.2 (mb), light
- Local time
- UTC
- 1986-06-23 09:45:30 UTC
- Depth
- 273.9 km (170.2 mi), intermediate-depth
- Epicenter
- 19.657° S, 175.833° 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 1 in the 30 days before it.
After
- 6.5151 km NW of Nuku‘alofa, Tonga · 14697 days ago · 211 km deep · 48 km away
- 5.4149 km W of Pangai, Tonga · 14685 days ago · 233 km deep · 27 km away
- 4.9166 km WNW of Pangai, Tonga · 14669 days ago · 237 km deep · 28 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002vb0. Read Wed, Sep 23, 2026, 7:08 AM UTC.