M4.9 earthquake 102 km W of Neiafu, Tonga
A magnitude 4.9 earthquake struck 102 km W of Neiafu, Tonga on Fri, Aug 10, 2018, 6:57 PM GMT+13 (05:57 UTC), 134 km (83 mi) below the surface.
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
- 2018-08-10 05:57:19 UTC
- Depth
- 133.7 km (83.1 mi), intermediate-depth
- Epicenter
- 18.749° S, 174.950° W
- Region
- Tonga
- Felt reports
- 1
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Magnitude estimates
Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.
| Mag. | Scale | Computed by | Notes |
|---|---|---|---|
| 4.9 | mb, body-wave | USGS National Earthquake Information Center | Preferred · Reviewed · ±0.072 · 60 stations |
| 5.02 | Mw, moment | ISC-GEM global catalog | Final · ±0.1 |
Did you feel it?
1 person reported to the USGS what they felt; the strongest reported shaking was II, weak shaking.
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 10.2 km horizontally, 7.1 km in depth
- Magnitude uncertainty
- ±0.07
- Depth from
- From location
- Station coverage gap
- 90°
- Stations used
- 79
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.9 and up: 3 in the 60 days after this one and 4 in the 30 days before it.
After
- 4.669 km WSW of Neiafu, Tonga · 2958 days ago · 109 km deep · 34 km away
- 4.4100 km WNW of Pangai, Tonga · 2944 days ago · 207 km deep · 92 km away
- 4.1154 km W of Neiafu, Tonga · 2938 days ago · 149 km deep · 52 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us1000g681 (also filed as iscgem612507815). Read Thu, Oct 1, 2026, 11:45 PM UTC.