M5.4 earthquake 89 km NE of Hihifo, Tonga
A magnitude 5.4 earthquake struck 89 km NE of Hihifo, Tonga on Fri, Aug 1, 1986, 11:17 AM GMT-11 (22:17 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.9 90 km NNE 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
- 5.4 (mb), moderate
- Local time
- UTC
- 1986-08-01 22:17:38 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 15.328° S, 173.265° 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 2.4 and up: 4 in the 60 days after this one and 2 in the 30 days before it.
After
- 5.990 km NNE of Hihifo, Tonga · 14636 days ago · 21 km deep · 28 km away
- 5.7100 km NNE of Hihifo, Tonga · 14636 days ago · 33 km deep · 33 km away
- 4.897 km E of Hihifo, Tonga · 14622 days ago · 33 km deep · 91 km away
- 4.678 km N of Hihifo, Tonga · 14605 days ago · 33 km deep · 59 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002wt7. Read Tue, Sep 22, 2026, 5:59 AM UTC.