M4.6 earthquake 203 km SSW of Houma, Tonga
A magnitude 4.6 earthquake struck 203 km SSW of Houma, Tonga on Thu, Sep 21, 2023, 4:19 PM GMT+13 (03:19 UTC), 48 km (30 mi) below the surface.
A larger quake followed: M4.9 146 km S of ‘Ohonua, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.6 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2023-09-21 03:19:36 UTC
- Depth
- 48.0 km (29.8 mi), shallow
- Epicenter
- 22.863° S, 176.060° 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.
- Location uncertainty
- About 11.5 km horizontally, 7.7 km in depth
- Magnitude uncertainty
- ±0.12
- Depth from
- From location
- Station coverage gap
- 144°
- Stations used
- 30
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.6 and up: 3 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.9146 km S of ‘Ohonua, Tonga · 1096 days ago · 10 km deep · 96 km away
- 4.5272 km SW of Houma, Tonga · 1062 days ago · 173 km deep · 91 km away
- 4.6188 km SSW of Houma, Tonga · 1054 days ago · 73 km deep · 32 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000lb2s. Read Sun, Oct 4, 2026, 7:51 PM UTC.