M4.8 earthquake 111 km ESE of Hihifo, Tonga
A magnitude 4.8 earthquake struck 111 km ESE of Hihifo, Tonga on Thu, Aug 16, 1984, 8:25 PM GMT-11 (07:25 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.4 163 km ESE of Hihifo, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.8 (ms), light
- Local time
- UTC
- 1984-08-17 07:25:12 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 16.291° S, 172.813° 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
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.8 and up: 2 in the 60 days after this one and 2 in the 30 days before it.
After
- 5.4163 km ESE of Hihifo, Tonga · 15358 days ago · 33 km deep · 56 km away
- 4.8124 km ESE of Hihifo, Tonga · 15338 days ago · 33 km deep · 16 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00026fx. Read Tue, Sep 22, 2026, 8:55 AM UTC.