M4.0 earthquake 196 km WNW of Hihifo, Tonga
A magnitude 4.0 earthquake struck 196 km WNW of Hihifo, Tonga on Mon, Oct 28, 1985, 1:41 AM GMT-12 (13:41 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
- 4.0 (mb), light
- Local time
- UTC
- 1985-10-28 13:41:05 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 15.460° S, 175.556° 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 1.5 and up: 0 in the 60 days after this one and 3 in the 30 days before it.
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002m7f. Read Tue, Sep 22, 2026, 7:41 AM UTC.