M5.1 earthquake 81 km WNW of Pangai, Tonga
A magnitude 5.1 earthquake struck 81 km WNW of Pangai, Tonga on Sat, Jul 30, 1977, 5:51 AM GMT+13 (16:51 UTC), 129 km (80 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.1 (mb), moderate
- Local time
- UTC
- 1977-07-29 16:51:06 UTC
- Depth
- 129.0 km (80.2 mi), intermediate-depth
- Epicenter
- 19.468° S, 175.036° 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
- CONSTRAINED_BY_DEPTH_PHASES
- Stations used
- 70
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.1 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 usp0000pxa. Read Tue, Sep 22, 2026, 4:25 PM UTC.