M4.9 earthquake 137 km SSE of Pangai, Tonga
A magnitude 4.9 earthquake struck 137 km SSE of Pangai, Tonga on Wed, Dec 13, 2017, 6:26 AM GMT+13 (17:26 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M5.3 87 km SSE 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
- 4.9 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2017-12-12 17:26:10 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 20.864° S, 173.643° 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 8.4 km horizontally, 1.9 km in depth
- Magnitude uncertainty
- ±0.19
- Depth from
- Operator assigned
- Station coverage gap
- 100°
- Stations used
- 18
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.9 and up: 2 in the 60 days after this one and 8 in the 30 days before it.
After
- 4.9111 km SE of Pangai, Tonga · 3216 days ago · 10 km deep · 41 km away
- 5.387 km SSE of Pangai, Tonga · 3211 days ago · 10 km deep · 51 km away
Before
- 4.7117 km SE of Pangai, Tonga · 3218 days ago · 10 km deep · 34 km away
- 5.7130 km SSE of Pangai, Tonga · 3219 days ago · 7 km deep · 9 km away
- 5.0132 km SSE of Pangai, Tonga · 3230 days ago · 10 km deep · 10 km away
- 5.0111 km SE of Pangai, Tonga · 3230 days ago · 10 km deep · 28 km away
- 4.6100 km ESE of Pangai, Tonga · 3234 days ago · 10 km deep · 75 km away
- 4.7102 km ESE of Pangai, Tonga · 3235 days ago · 10 km deep · 91 km away
- 4.6137 km SE of Pangai, Tonga · 3237 days ago · 10 km deep · 27 km away
- 4.682 km SSE of Pangai, Tonga · 3244 days ago · 10 km deep · 57 km away
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us1000bt5l. Read Sun, Oct 4, 2026, 10:59 AM UTC.