M4.5 earthquake 122 km E of Hihifo, Tonga
A magnitude 4.5 earthquake struck 122 km E of Hihifo, Tonga on Mon, Aug 28, 2017, 9:08 PM GMT+13 (08:08 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M5.0 157 km SSW of Lotofag?, Samoa. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.5 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2017-08-28 08:08:13 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 15.787° S, 172.663° 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 9.8 km horizontally, 2.0 km in depth
- Magnitude uncertainty
- ±0.19
- Depth from
- Operator assigned
- Station coverage gap
- 128°
- Stations used
- 12
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
- 5.0157 km SSW of Lotofag?, Samoa · 3311 days ago · 10 km deep · 61 km away
- 4.7132 km ENE of Hihifo, Tonga · 3305 days ago · 10 km deep · 51 km away
- 4.873 km ESE of Hihifo, Tonga · 3272 days ago · 24 km deep · 82 km away
- 4.464 km ESE of Hihifo, Tonga · 3264 days ago · 10 km deep · 68 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us2000adir. Read Fri, Oct 2, 2026, 6:27 PM UTC.