M4.7 earthquake 78 km NNW of Pangai, Tonga
A magnitude 4.7 earthquake struck 78 km NNW of Pangai, Tonga on Sat, Dec 1, 1984, 7:40 PM GMT+13 (06:40 UTC), 180 km (112 mi) below the surface.
A larger quake followed: M4.9 81 km WSW of Neiafu, 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
- 1984-12-01 06:40:15 UTC
- Depth
- 180.0 km (111.8 mi), intermediate-depth
- Epicenter
- 19.213° S, 174.746° 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: 4 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.981 km WSW of Neiafu, Tonga · 15268 days ago · 60 km deep · 35 km away
- 5.188 km NW of Pangai, Tonga · 15258 days ago · 138 km deep · 11 km away
- 4.697 km W of Neiafu, Tonga · 15229 days ago · 233 km deep · 65 km away
- 5.2136 km WNW of Pangai, Tonga · 15223 days ago · 139 km deep · 85 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00029nx. Read Tue, Sep 22, 2026, 3:36 PM UTC.