M5.1 earthquake 101 km N of Hihifo, Tonga
A magnitude 5.1 earthquake struck 101 km N of Hihifo, Tonga on Sat, Sep 22, 1973, 6:35 AM GMT-11 (17:35 UTC), 10 km (6 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
- 1973-09-22 17:35:47 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 15.043° S, 173.705° 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
- 30
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 usp00003h2. Read Tue, Sep 22, 2026, 8:01 AM UTC.