M4.5 earthquake 171 km W of Pangai, Tonga
A magnitude 4.5 earthquake struck 171 km W of Pangai, Tonga on Mon, Apr 16, 1984, 8:45 PM GMT+13 (07:45 UTC), 277 km (172 mi) below the surface.
A larger quake followed: M5.6 141 km W 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
- 1984-04-16 07:45:14 UTC
- Depth
- 277.4 km (172.4 mi), intermediate-depth
- Epicenter
- 19.520° S, 175.962° 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 2 in the 30 days before it.
After
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00023kt. Read Tue, Sep 22, 2026, 4:51 PM UTC.