M5.6 earthquake 90 km NNE of Hihifo, Tonga
A magnitude 5.6 earthquake struck 90 km NNE of Hihifo, Tonga on Fri, Mar 9, 1973, 10:50 PM GMT-11 (09:50 UTC), 8 km (5 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.6 (mb), moderate
- Local time
- UTC
- 1973-03-10 09:50:00 UTC
- Depth
- 8.0 km (5.0 mi), shallow
- Epicenter
- 15.184° S, 173.524° 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
- 55
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.5 and up: 3 in the 60 days after this one and 3 in the 30 days before it.
After
- 4.9133 km ENE of Hihifo, Tonga · 19554 days ago · 33 km deep · 91 km away
- 5.3142 km SW of Gataivai, Samoa · 19514 days ago · 49 km deep · 57 km away
- 4.633 km NW of Hihifo, Tonga · 19512 days ago · 54 km deep · 79 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00000wh (also filed as iscgem762624). Read Tue, Sep 22, 2026, 10:23 PM UTC.