M4.5 earthquake 95 km ENE of ‘Ohonua, Tonga
A magnitude 4.5 earthquake struck 95 km ENE of ‘Ohonua, Tonga on Fri, Aug 16, 1985, 1:14 AM GMT+13 (12:14 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.6 81 km NE of Kolonga, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.5 (mb), light
- Local time
- UTC
- 1985-08-15 12:14:20 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 20.944° S, 174.129° 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 1.5 and up: 5 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.681 km NE of Kolonga, Tonga · 15008 days ago · 69 km deep · 68 km away
- 5.1141 km SE of Pangai, Tonga · 14981 days ago · 33 km deep · 68 km away
- 5.4102 km ENE of ‘Ohonua, Tonga · 14969 days ago · 33 km deep · 8 km away
- 5.179 km ENE of ‘Ohonua, Tonga · 14958 days ago · 66 km deep · 19 km away
- 5.281 km ENE of ‘Ohonua, Tonga · 14958 days ago · 66 km deep · 20 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002hsc. Read Tue, Sep 22, 2026, 7:22 AM UTC.