M4.1 earthquake 190 km WNW of Pangai, Tonga
A magnitude 4.1 earthquake struck 190 km WNW of Pangai, Tonga on Mon, Oct 22, 2018, 3:11 AM GMT+13 (14:11 UTC), 238 km (148 mi) below the surface.
A larger quake followed: M4.5 168 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
- 2018-10-21 14:11:33 UTC
- Depth
- 237.8 km (147.8 mi), intermediate-depth
- Epicenter
- 19.365° S, 176.111° 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 12.3 km horizontally, 7.8 km in depth
- Magnitude uncertainty
- ±0.14
- Depth from
- From location
- Station coverage gap
- 108°
- Stations used
- 17
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 3 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.5168 km NNW of Nuku‘alofa, Tonga · 2893 days ago · 10 km deep · 53 km away
- 4.0152 km WNW of Pangai, Tonga · 2875 days ago · 258 km deep · 39 km away
- 4.5214 km NW of Pangai, Tonga · 2846 days ago · 288 km deep · 70 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us1000hh1f. Read Mon, Sep 28, 2026, 3:48 AM UTC.