M4.8 earthquake 141 km WNW of Neiafu, Tonga
A magnitude 4.8 earthquake struck 141 km WNW of Neiafu, Tonga on Thu, Aug 25, 1977, 2:32 AM GMT+13 (13:32 UTC), 170 km (106 mi) below the surface.
A larger quake followed: M5.1 143 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
- 4.8 (mb), light
- Local time
- UTC
- 1977-08-24 13:32:08 UTC
- Depth
- 170.0 km (105.6 mi), intermediate-depth
- Epicenter
- 17.948° S, 175.102° 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.
- Stations used
- 32
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.8 and up: 3 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.5173 km NW of Neiafu, Tonga · 17883 days ago · 245 km deep · 53 km away
- 4.7163 km NW of Neiafu, Tonga · 17882 days ago · 238 km deep · 31 km away
- 5.1143 km WNW of Neiafu, Tonga · 17877 days ago · 259 km deep · 26 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000qa6. Read Tue, Sep 29, 2026, 2:43 PM UTC.