M4.4 earthquake 116 km S of Hihifo, Tonga
A magnitude 4.4 earthquake struck 116 km S of Hihifo, Tonga on Tue, Oct 23, 1984, 9:20 AM GMT-12 (21:20 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M6.6 131 km SSW 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
- 4.4 (mb), light
- Local time
- UTC
- 1984-10-23 21:20:39 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 17.003° S, 173.740° 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
Nearby
Within 100 km, magnitude 1.5 and up: 4 in the 60 days after this one and 1 in the 30 days before it.
After
- 6.6131 km SSW of Hihifo, Tonga · 15302 days ago · 141 km deep · 38 km away
- 4.686 km SW of Hihifo, Tonga · 15301 days ago · 192 km deep · 72 km away
- 4.6107 km NNE of Neiafu, Tonga · 15294 days ago · 43 km deep · 82 km away
- 4.3138 km SSE of Hihifo, Tonga · 15261 days ago · 165 km deep · 48 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00028ek. Read Tue, Sep 22, 2026, 11:19 AM UTC.