M4.6 earthquake 284 km SSW of ‘Ohonua, Tonga
A magnitude 4.6 earthquake struck 284 km SSW of ‘Ohonua, Tonga on Sat, Sep 22, 1984, 5:23 PM GMT+13 (04:23 UTC), 144 km (89 mi) below the surface.
A larger quake followed: M5.5 Tonga region. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.6 (mb), light
- Local time
- UTC
- 1984-09-22 04:23:28 UTC
- Depth
- 143.5 km (89.2 mi), intermediate-depth
- Epicenter
- 23.672° S, 176.086° 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
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.6 and up: 2 in the 60 days after this one and 1 in the 30 days before it.
After
- 5.5Tonga region · 15340 days ago · 68 km deep · 38 km away
- 5.0294 km SSW of ‘Ohonua, Tonga · 15338 days ago · 33 km deep · 27 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00027kh. Read Tue, Sep 22, 2026, 10:52 AM UTC.