M4.4 earthquake 47 km ESE of Pangai, Tonga
A magnitude 4.4 earthquake struck 47 km ESE of Pangai, Tonga on Wed, Sep 20, 2017, 1:04 AM GMT+13 (12:04 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M6.1 103 km SE of Pangai, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.4 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2017-09-19 12:04:27 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 19.998° S, 173.942° 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 7.2 km horizontally, 1.9 km in depth
- Magnitude uncertainty
- ±0.18
- Depth from
- Operator assigned
- Station coverage gap
- 103°
- Stations used
- 13
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 8 in the 60 days after this one and 4 in the 30 days before it.
After
- 4.287 km SSE of Pangai, Tonga · 3293 days ago · 39 km deep · 60 km away
- 6.1103 km SE of Pangai, Tonga · 3273 days ago · 10 km deep · 68 km away · felt by 2
- 4.4133 km SE of Pangai, Tonga · 3273 days ago · 10 km deep · 93 km away
- 4.5105 km ESE of Pangai, Tonga · 3271 days ago · 10 km deep · 58 km away
- 4.4114 km ESE of Pangai, Tonga · 3270 days ago · 10 km deep · 67 km away
- 4.677 km SE of Pangai, Tonga · 3263 days ago · 10 km deep · 37 km away
- 4.9137 km SE of Pangai, Tonga · 3250 days ago · 10 km deep · 92 km away
- 4.682 km SSE of Pangai, Tonga · 3244 days ago · 10 km deep · 54 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us2000awmh. Read Sun, Oct 4, 2026, 5:34 PM UTC.