M4.2 earthquake 259 km SSW of ‘Ohonua, Tonga
A magnitude 4.2 earthquake struck 259 km SSW of ‘Ohonua, Tonga on Fri, Aug 23, 2019, 3:08 PM GMT+13 (02:08 UTC), 35 km (22 mi) below the surface.
A larger quake followed: M4.6 south of Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.2 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2019-08-23 02:08:16 UTC
- Depth
- 35.0 km (21.7 mi), shallow
- Epicenter
- 23.590° S, 175.642° 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 15.0 km horizontally, 2.0 km in depth
- Magnitude uncertainty
- ±0.21
- Depth from
- Operator assigned
- Station coverage gap
- 163°
- Stations used
- 10
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 2 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us700059pg. Read Fri, Oct 2, 2026, 8:39 AM UTC.