M4.8 earthquake 110 km NNW of Hihifo, Tonga
A magnitude 4.8 earthquake struck 110 km NNW of Hihifo, Tonga on Sun, Jul 21, 1985, 4:16 PM GMT-11 (03:16 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M6.1 113 km NW 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
- 4.8 (mb), light
- Local time
- UTC
- 1985-07-22 03:16:28 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 15.070° S, 174.268° 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 1.8 and up: 6 in the 60 days after this one and 1 in the 30 days before it.
After
- 5.387 km N of Hihifo, Tonga · 15042 days ago · 33 km deep · 66 km away
- 6.1113 km NW of Hihifo, Tonga · 15027 days ago · 208 km deep · 47 km away
- 5.095 km NNE of Hihifo, Tonga · 15022 days ago · 33 km deep · 87 km away
- 4.475 km NNE of Hihifo, Tonga · 15020 days ago · 33 km deep · 73 km away
- 5.868 km NNE of Hihifo, Tonga · 14993 days ago · 68 km deep · 86 km away
- 4.982 km NNW of Hihifo, Tonga · 14989 days ago · 139 km deep · 28 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002gzv. Read Wed, Sep 30, 2026, 1:48 AM UTC.