M5.6 earthquake 35 km ENE of Hihifo, Tonga
A magnitude 5.6 earthquake struck 35 km ENE of Hihifo, Tonga on Fri, Apr 26, 1985, 1:33 PM GMT-11 (00:33 UTC), 81 km (50 mi) below the surface.
A larger quake followed: M6.7 Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.6 (mw), moderate
- Local time
- UTC
- 1985-04-27 00:33:13 UTC
- Depth
- 80.8 km (50.2 mi), intermediate-depth
- Epicenter
- 15.798° S, 173.503° 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
- CONSTRAINED_BY_DEPTH_PHASES
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.5 and up: 9 in the 60 days after this one and 0 in the 30 days before it.
After
- 4.669 km E of Hihifo, Tonga · 15120 days ago · 33 km deep · 48 km away
- 4.8Tonga · 15113 days ago · 76 km deep · 88 km away
- 4.4132 km ENE of Hihifo, Tonga · 15105 days ago · 33 km deep · 97 km away
- 4.66 km NNE of Hihifo, Tonga · 15099 days ago · 33 km deep · 31 km away
- 6.7Tonga · 15086 days ago · 33 km deep · 57 km away
- 4.398 km NNE of Hihifo, Tonga · 15084 days ago · 33 km deep · 79 km away
- 5.291 km NE of Hihifo, Tonga · 15083 days ago · 33 km deep · 56 km away
- 4.6113 km N of Hihifo, Tonga · 15071 days ago · 33 km deep · 97 km away
- 4.863 km ESE of Hihifo, Tonga · 15070 days ago · 33 km deep · 48 km away
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002e6x (also filed as gcmtb042785a, gcmt19850427003312, iscgem528524). Read Tue, Sep 22, 2026, 5:03 AM UTC.