M4.9 earthquake 130 km ENE of Neiafu, Tonga
A magnitude 4.9 earthquake struck 130 km ENE of Neiafu, Tonga on Wed, Mar 31, 2021, 5:18 AM GMT-12 (17:18 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M5.1 96 km ENE of Neiafu, 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), light
- Local time
- UTC
- 2021-03-31 17:18:13 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 18.244° S, 172.828° 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 14.6 km horizontally, 1.9 km in depth
- Magnitude uncertainty
- ±0.11
- Depth from
- Operator assigned
- Station coverage gap
- 126°
- Stations used
- 29
Nearby
Within 100 km, magnitude 1.9 and up: 4 in the 60 days after this one and 4 in the 30 days before it.
After
- 4.6140 km NE of Neiafu, Tonga · 1987 days ago · 10 km deep · 33 km away
- 5.196 km ENE of Neiafu, Tonga · 1976 days ago · 10 km deep · 37 km away
- 4.5113 km NE of Neiafu, Tonga · 1972 days ago · 10 km deep · 71 km away
- 4.6161 km ENE of Neiafu, Tonga · 1958 days ago · 10 km deep · 36 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000e019. Read Wed, Sep 30, 2026, 5:30 AM UTC.