M5.3 earthquake 188 km WNW of Neiafu, Tonga
A magnitude 5.3 earthquake struck 188 km WNW of Neiafu, Tonga on Wed, Aug 1, 1984, 7:17 AM GMT+13 (18:17 UTC), 314 km (195 mi) below the surface.
A larger quake followed: M5.4 232 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
- 5.3 (mw), moderate
- Local time
- UTC
- 1984-07-31 18:17:43 UTC
- Depth
- 313.8 km (195.0 mi), deep
- Epicenter
- 17.721° S, 175.474° 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.
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.3 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 usp000264r (also filed as gcmtb073184b, gcmt19840731181748, iscgem550057). Read Tue, Sep 22, 2026, 10:32 PM UTC.