M4.2 earthquake 219 km W of Hihifo, Tonga
A magnitude 4.2 earthquake struck 219 km W of Hihifo, Tonga on Tue, Aug 28, 2018, 1:02 AM GMT-12 (13:02 UTC), 350 km (217 mi) below the surface.
A larger quake followed: M4.9 Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.2 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2018-08-28 13:02:09 UTC
- Depth
- 350.0 km (217.5 mi), deep
- Epicenter
- 16.187° S, 175.837° 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 17.7 km horizontally, 11.0 km in depth
- Magnitude uncertainty
- ±0.12
- Depth from
- From location
- Station coverage gap
- 120°
- Stations used
- 25
Nearby
Within 100 km, magnitude 1.5 and up: 10 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.8253 km W of Hihifo, Tonga · 2955 days ago · 10 km deep · 35 km away
- 4.5150 km WNW of Hihifo, Tonga · 2941 days ago · 247 km deep · 95 km away
- 4.9Tonga · 2931 days ago · 10 km deep · 77 km away
- 4.4211 km W of Hihifo, Tonga · 2927 days ago · 340 km deep · 64 km away
- 4.0261 km W of Hihifo, Tonga · 2926 days ago · 391 km deep · 43 km away
- 4.3208 km W of Hihifo, Tonga · 2924 days ago · 339 km deep · 13 km away
- 4.3150 km WSW of Hihifo, Tonga · 2919 days ago · 332 km deep · 80 km away
- 4.2232 km WSW of Hihifo, Tonga · 2917 days ago · 296 km deep · 87 km away
- 4.0201 km WSW of Hihifo, Tonga · 2913 days ago · 332 km deep · 81 km away
- 4.3260 km SE of Alo, Wallis and Futuna · 2899 days ago · 379 km deep · 77 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us2000h994. Read Sat, Oct 3, 2026, 4:56 AM UTC.