M4.9 earthquake 40 km NNW of Neiafu, Tonga
A magnitude 4.9 earthquake struck 40 km NNW of Neiafu, Tonga on Fri, Oct 1, 2021, 4:37 AM GMT+13 (15:37 UTC), 80 km (50 mi) below the surface.
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
- 2021-09-30 15:37:55 UTC
- Depth
- 79.8 km (49.6 mi), intermediate-depth
- Epicenter
- 18.335° S, 174.172° 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 10.3 km horizontally, 7.6 km in depth
- Magnitude uncertainty
- ±0.09
- Depth from
- From location
- Station coverage gap
- 118°
- Stations used
- 34
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.9 and up: 6 in the 60 days after this one and 3 in the 30 days before it.
After
- 4.8117 km N of Neiafu, Tonga · 1821 days ago · 98 km deep · 83 km away
- 4.488 km NW of Neiafu, Tonga · 1809 days ago · 131 km deep · 51 km away
- 4.6125 km NNW of Neiafu, Tonga · 1794 days ago · 176 km deep · 86 km away
- 4.533 km NE of Neiafu, Tonga · 1791 days ago · 44 km deep · 45 km away
- 4.285 km NNW of Neiafu, Tonga · 1787 days ago · 67 km deep · 45 km away
- 4.6138 km NW of Neiafu, Tonga · 1780 days ago · 227 km deep · 100 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000fsa1. Read Wed, Sep 30, 2026, 6:15 AM UTC.