M4.5 earthquake 163 km W of Pangai, Tonga
A magnitude 4.5 earthquake struck 163 km W of Pangai, Tonga on Mon, Jul 22, 1985, 12:24 PM GMT+13 (23:24 UTC), 195 km (121 mi) below the surface.
A larger quake followed: M5.7 144 km WNW 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
- 4.5 (mb), light
- Local time
- UTC
- 1985-07-21 23:24:48 UTC
- Depth
- 195.1 km (121.2 mi), intermediate-depth
- Epicenter
- 19.733° S, 175.908° 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: 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 usp0002gzm. Read Tue, Sep 22, 2026, 6:05 AM UTC.