M4.5 earthquake 128 km SSE of Hihifo, Tonga
A magnitude 4.5 earthquake struck 128 km SSE of Hihifo, Tonga on Fri, Sep 28, 2018, 11:36 PM GMT-12 (11:36 UTC), 61 km (38 mi) below the surface.
A larger quake followed: M4.7 104 km N of Neiafu, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.5 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2018-09-29 11:36:31 UTC
- Depth
- 61.0 km (37.9 mi), shallow
- Epicenter
- 17.087° S, 173.544° 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, 11.8 km in depth
- Magnitude uncertainty
- ±0.16
- Depth from
- From location
- Station coverage gap
- 124°
- Stations used
- 16
Nearby
Within 100 km, magnitude 1.5 and up: 4 in the 60 days after this one and 5 in the 30 days before it.
After
- 4.589 km SE of Hihifo, Tonga · 2919 days ago · 35 km deep · 60 km away
- 4.6123 km NNE of Neiafu, Tonga · 2904 days ago · 35 km deep · 74 km away
- 4.7104 km N of Neiafu, Tonga · 2895 days ago · 104 km deep · 97 km away
- 4.661 km SW of Hihifo, Tonga · 2894 days ago · 60 km deep · 100 km away
Before
- 4.8121 km SSW of Hihifo, Tonga · 2926 days ago · 10 km deep · 69 km away
- 4.3147 km NNW of Neiafu, Tonga · 2927 days ago · 146 km deep · 83 km away
- 4.578 km S of Hihifo, Tonga · 2930 days ago · 108 km deep · 53 km away
- 4.6104 km SSW of Hihifo, Tonga · 2931 days ago · 10 km deep · 87 km away
- 4.591 km S of Hihifo, Tonga · 2947 days ago · 95 km deep · 37 km away
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us1000h7he. Read Fri, Oct 2, 2026, 8:58 AM UTC.