M5.2 earthquake 181 km W of Hihifo, Tonga
A magnitude 5.2 earthquake struck 181 km W of Hihifo, Tonga on Mon, Jul 18, 1977, 6:31 AM GMT-12 (18:31 UTC), 33 km (21 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.2 (mb), moderate
- Local time
- UTC
- 1977-07-18 18:31:52 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 15.646° S, 175.457° 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
- OPERATOR_ASSIGNED
- Stations used
- 38
Nearby
Within 100 km, magnitude 2.2 and up: 1 in the 60 days after this one and 1 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 usp0000psk. Read Tue, Sep 22, 2026, 9:38 AM UTC.