M4.9 earthquake 92 km S of Pangai, Tonga
A magnitude 4.9 earthquake struck 92 km S of Pangai, Tonga on Sun, Aug 20, 1978, 6:20 AM GMT+13 (17:20 UTC), 95 km (59 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.9 (mb), light
- Local time
- UTC
- 1978-08-19 17:20:01 UTC
- Depth
- 95.0 km (59.0 mi), intermediate-depth
- Epicenter
- 20.640° S, 174.247° 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
- 45
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.9 and up: 1 in the 60 days after this one and 3 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 usp0000w47. Read Mon, Sep 28, 2026, 6:07 PM UTC.