M5.5 earthquake 89 km ESE of Hihifo, Tonga
A magnitude 5.5 earthquake struck 89 km ESE of Hihifo, Tonga on Mon, Aug 25, 1986, 4:40 AM GMT-11 (15:40 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
- 5.5 (mw), moderate
- Local time
- UTC
- 1986-08-25 15:40:31 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 16.316° S, 173.050° 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 2.5 and up: 4 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.6174 km ESE of Hihifo, Tonga · 14630 days ago · 33 km deep · 86 km away
- 4.897 km E of Hihifo, Tonga · 14622 days ago · 33 km deep · 33 km away
- 4.865 km ESE of Hihifo, Tonga · 14608 days ago · 33 km deep · 25 km away
- 5.240 km SSW of Hihifo, Tonga · 14584 days ago · 109 km deep · 96 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002xhm (also filed as gcmtb082586a, gcmt19860825154031, iscgem489379). Read Tue, Sep 22, 2026, 6:17 AM UTC.