M4.9 earthquake 148 km SW of Hihifo, Tonga
A magnitude 4.9 earthquake struck 148 km SW of Hihifo, Tonga on Mon, Nov 4, 1985, 10:43 AM GMT-12 (22:43 UTC), 140 km (87 mi) below the surface.
A larger quake followed: M6.0 62 km SW 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
- 4.9 (mb), light
- Local time
- UTC
- 1985-11-04 22:43:24 UTC
- Depth
- 139.7 km (86.8 mi), intermediate-depth
- Epicenter
- 17.037° S, 174.625° 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
- FROM_LOCATION
Nearby
Within 100 km, magnitude 1.9 and up: 2 in the 60 days after this one and 3 in the 30 days before it.
After
- 4.6160 km WSW of Hihifo, Tonga · 14925 days ago · 229 km deep · 74 km away
- 6.062 km SW of Hihifo, Tonga · 14907 days ago · 165 km deep · 87 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002mfg. Read Tue, Sep 22, 2026, 7:48 PM UTC.