M4.6 earthquake 69 km E of Hihifo, Tonga
A magnitude 4.6 earthquake struck 69 km E of Hihifo, Tonga on Tue, Apr 30, 1985, 4:31 AM GMT-11 (15:31 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.8 Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.6 (mb), light
- Local time
- UTC
- 1985-04-30 15:31:31 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 16.070° S, 173.160° 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 1.6 and up: 7 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.8Tonga · 15113 days ago · 76 km deep · 92 km away
- 4.4132 km ENE of Hihifo, Tonga · 15105 days ago · 33 km deep · 92 km away
- 4.6134 km E of Hihifo, Tonga · 15101 days ago · 33 km deep · 65 km away
- 4.66 km NNE of Hihifo, Tonga · 15098 days ago · 33 km deep · 69 km away
- 6.7Tonga · 15086 days ago · 33 km deep · 95 km away
- 5.291 km NE of Hihifo, Tonga · 15083 days ago · 33 km deep · 65 km away
- 4.863 km ESE of Hihifo, Tonga · 15069 days ago · 33 km deep · 10 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002eas. Read Tue, Sep 22, 2026, 12:11 AM UTC.