M4.9 earthquake 86 km S of Pangai, Tonga
A magnitude 4.9 earthquake struck 86 km S of Pangai, Tonga on Sat, Nov 17, 1973, 8:31 AM GMT+13 (19:31 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
- 4.9 (ms), light
- Local time
- UTC
- 1973-11-16 19:31:16 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 20.588° S, 174.274° 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
- 19
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.9 and up: 3 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.981 km E of ‘Ohonua, Tonga · 19294 days ago · 33 km deep · 97 km away
- 4.349 km SE of Pangai, Tonga · 19266 days ago · 33 km deep · 50 km away
- 4.630 km SSE of Pangai, Tonga · 19257 days ago · 33 km deep · 58 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000461. Read Tue, Sep 22, 2026, 4:01 AM UTC.