M4.6 earthquake 104 km SSW of Hihifo, Tonga
A magnitude 4.6 earthquake struck 104 km SSW of Hihifo, Tonga on Sat, Sep 22, 2018, 9:44 PM GMT-12 (09:44 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M5.4 86 km SW of Hihifo, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.6 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2018-09-23 09:44:42 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 16.774° S, 174.291° 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 6.8 km horizontally, 1.9 km in depth
- Magnitude uncertainty
- ±0.16
- Depth from
- Operator assigned
- Station coverage gap
- 79°
- Stations used
- 18
Nearby
Within 100 km, magnitude 1.6 and up: 8 in the 60 days after this one and 4 in the 30 days before it.
After
- 4.578 km S of Hihifo, Tonga · 2932 days ago · 108 km deep · 57 km away
- 4.3147 km NNW of Neiafu, Tonga · 2928 days ago · 146 km deep · 64 km away
- 4.8121 km SSW of Hihifo, Tonga · 2927 days ago · 10 km deep · 26 km away
- 4.5128 km SSE of Hihifo, Tonga · 2926 days ago · 61 km deep · 87 km away
- 4.3150 km WSW of Hihifo, Tonga · 2920 days ago · 332 km deep · 98 km away
- 4.480 km WSW of Hihifo, Tonga · 2907 days ago · 108 km deep · 79 km away
- 5.486 km SW of Hihifo, Tonga · 2900 days ago · 200 km deep · 25 km away
- 4.661 km SW of Hihifo, Tonga · 2896 days ago · 60 km deep · 44 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us1000h3ts. Read Sat, Oct 3, 2026, 5:03 PM UTC.