M4.1 earthquake 138 km WNW of Pangai, Tonga
A magnitude 4.1 earthquake struck 138 km WNW of Pangai, Tonga on Wed, Sep 23, 2020, 8:48 AM GMT+13 (19:48 UTC), 494 km (307 mi) below the surface.
A larger quake followed: M4.7 155 km NNW of Nuku‘alofa, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.1 (mb), light
- Local time
- UTC
- 2020-09-22 19:48:11 UTC
- Depth
- 493.6 km (306.7 mi), deep
- Epicenter
- 19.468° S, 175.627° 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 14.9 km horizontally, 9.3 km in depth
- Magnitude uncertainty
- ±0.17
- Depth from
- From location
- Station coverage gap
- 149°
- Stations used
- 19
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 4 in the 60 days after this one and 3 in the 30 days before it.
After
- 4.1157 km NW of Pangai, Tonga · 2183 days ago · 204 km deep · 53 km away
- 4.6170 km NNW of Nuku‘alofa, Tonga · 2148 days ago · 208 km deep · 55 km away
- 4.3161 km NW of Pangai, Tonga · 2147 days ago · 212 km deep · 70 km away
- 4.7155 km NNW of Nuku‘alofa, Tonga · 2141 days ago · 10 km deep · 70 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000c18e. Read Tue, Sep 29, 2026, 1:24 AM UTC.