M4.1 earthquake 101 km WNW of Hihifo, Tonga
A magnitude 4.1 earthquake struck 101 km WNW of Hihifo, Tonga on Sat, Sep 1, 2018, 4:54 PM GMT+13 (03:54 UTC), 279 km (173 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
- 4.1 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2018-09-01 03:54:18 UTC
- Depth
- 279.1 km (173.4 mi), intermediate-depth
- Epicenter
- 15.640° S, 174.691° 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 11.4 km horizontally, 6.9 km in depth
- Magnitude uncertainty
- ±0.16
- Depth from
- From location
- Station coverage gap
- 69°
- Stations used
- 20
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 7 in the 60 days after this one and 5 in the 30 days before it.
After
- 4.767 km N of Hihifo, Tonga · 2946 days ago · 82 km deep · 98 km away
- 4.5150 km WNW of Hihifo, Tonga · 2941 days ago · 247 km deep · 50 km away
- 4.3100 km NNW of Hihifo, Tonga · 2938 days ago · 153 km deep · 76 km away
- 4.9Tonga · 2930 days ago · 10 km deep · 64 km away
- 4.3150 km WSW of Hihifo, Tonga · 2919 days ago · 332 km deep · 96 km away
- 4.480 km WSW of Hihifo, Tonga · 2906 days ago · 108 km deep · 54 km away
- 4.5115 km WNW of Hihifo, Tonga · 2897 days ago · 262 km deep · 13 km away
Before
- 4.694 km NW of Hihifo, Tonga · 2955 days ago · 225 km deep · 31 km away
- 4.4Tonga · 2956 days ago · 144 km deep · 100 km away
- 4.2119 km WNW of Hihifo, Tonga · 2972 days ago · 278 km deep · 19 km away
- 4.2107 km WNW of Hihifo, Tonga · 2975 days ago · 260 km deep · 12 km away
- 4.393 km N of Hihifo, Tonga · 2975 days ago · 35 km deep · 98 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event us2000h6cd. Read Fri, Oct 2, 2026, 12:48 PM UTC.