M5.1 earthquake 155 km NE of Neiafu, Tonga
A magnitude 5.1 earthquake struck 155 km NE of Neiafu, Tonga on Sun, Sep 1, 1985, 9:31 PM GMT-12 (09:31 UTC), 33 km (21 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.1 (mb), moderate
- Local time
- UTC
- 1985-09-02 09:31:23 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 17.678° S, 172.924° 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
- OPERATOR_ASSIGNED
Nearby
Within 100 km, magnitude 2.1 and up: 0 in the 60 days after this one and 1 in the 30 days before it.
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002jc3. Read Tue, Sep 22, 2026, 5:45 AM UTC.