M4.7 earthquake 67 km ENE of Hihifo, Tonga
A magnitude 4.7 earthquake struck 67 km ENE of Hihifo, Tonga on Sat, Sep 28, 1985, 11:52 AM GMT-11 (22:52 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.4 56 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
- 4.7 (mb), light
- Local time
- UTC
- 1985-09-28 22:52:20 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 15.683° S, 173.235° 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 1.7 and up: 5 in the 60 days after this one and 5 in the 30 days before it.
After
- 4.894 km N of Hihifo, Tonga · 14968 days ago · 33 km deep · 78 km away
- 4.444 km NE of Hihifo, Tonga · 14959 days ago · 53 km deep · 25 km away
- 5.294 km NNE of Hihifo, Tonga · 14950 days ago · 33 km deep · 53 km away
- 5.456 km ESE of Hihifo, Tonga · 14936 days ago · 33 km deep · 57 km away
- 4.678 km ESE of Hihifo, Tonga · 14936 days ago · 50 km deep · 51 km away
Before
- 4.7131 km E of Hihifo, Tonga · 14975 days ago · 33 km deep · 78 km away
- 3.8131 km ESE of Hihifo, Tonga · 14977 days ago · 33 km deep · 96 km away
- 4.588 km NNE of Hihifo, Tonga · 14977 days ago · 33 km deep · 62 km away
- 4.859 km E of Hihifo, Tonga · 14977 days ago · 33 km deep · 31 km away
- 5.868 km NNE of Hihifo, Tonga · 14992 days ago · 68 km deep · 46 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002k8f. Read Mon, Sep 28, 2026, 1:13 PM UTC.