M4.9 earthquake 269 km SSW of ‘Ohonua, Tonga
A magnitude 4.9 earthquake struck 269 km SSW of ‘Ohonua, Tonga on Fri, Mar 23, 2018, 3:05 PM GMT+13 (02:05 UTC), 35 km (22 mi) below the surface.
A larger quake followed: M5.2 265 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
- 4.9 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2018-03-23 02:05:40 UTC
- Depth
- 35.0 km (21.7 mi), shallow
- Epicenter
- 23.693° S, 175.588° 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 12.9 km horizontally, 2.0 km in depth
- Magnitude uncertainty
- ±0.09
- Depth from
- Operator assigned
- Station coverage gap
- 124°
- Stations used
- 43
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.9 and up: 4 in the 60 days after this one and 3 in the 30 days before it.
After
- 4.6284 km S of ‘Ohonua, Tonga · 3113 days ago · 10 km deep · 44 km away
- 4.7south of Tonga · 3106 days ago · 10 km deep · 55 km away
- 5.2265 km S of ‘Ohonua, Tonga · 3092 days ago · 10 km deep · 39 km away
- 5.0242 km S of ‘Ohonua, Tonga · 3073 days ago · 10 km deep · 50 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us1000dapm. Read Fri, Oct 2, 2026, 1:31 PM UTC.