M4.8 earthquake 145 km WNW of Neiafu, Tonga
A magnitude 4.8 earthquake struck 145 km WNW of Neiafu, Tonga on Fri, Sep 4, 2020, 6:11 AM GMT+13 (17:11 UTC), 230 km (143 mi) below the surface.
A larger quake followed: M5.0 83 km NW 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
- 4.8 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2020-09-03 17:11:59 UTC
- Depth
- 230.1 km (143.0 mi), intermediate-depth
- Epicenter
- 18.033° S, 175.197° W
- Region
- Tonga
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Magnitude estimates
Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.
| Mag. | Scale | Computed by | Notes |
|---|---|---|---|
| 4.8 | mb, body-wave | USGS National Earthquake Information Center | Preferred · Reviewed · ±0.031 · 324 stations |
| 5.04 | Mw, moment | ISC-GEM global catalog | Final · ±0.1 |
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 8.4 km horizontally, 5.1 km in depth
- Magnitude uncertainty
- ±0.03
- Depth from
- From location
- Station coverage gap
- 37°
- Stations used
- 109
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.8 and up: 4 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 us7000bhaa (also filed as iscgem619500222). Read Thu, Oct 1, 2026, 8:12 PM UTC.