M4.9 earthquake 181 km WNW of Neiafu, Tonga
A magnitude 4.9 earthquake struck 181 km WNW of Neiafu, Tonga on Thu, Sep 19, 1985, 9:06 PM GMT+13 (08:06 UTC), 300 km (186 mi) below the surface.
A larger quake followed: M5.1 137 km WNW of Neiafu, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.9 (mb), light
- Local time
- UTC
- 1985-09-19 08:06:20 UTC
- Depth
- 299.5 km (186.1 mi), intermediate-depth
- Epicenter
- 18.104° S, 175.606° 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 1.9 and up: 1 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 usp0002jw8. Read Tue, Sep 22, 2026, 7:43 AM UTC.