Tonga earthquakes

M4.6 earthquake 109 km NE of Hihifo, Tonga

A magnitude 4.6 earthquake struck 109 km NE of Hihifo, Tonga on Tue, Oct 16, 2018, 4:37 AM GMT+14 (14:37 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.1 89 km NNE of Hihifo, Tonga. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
4.6 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2018-10-15 14:37:35 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
15.265° S, 173.064° 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 10.8 km horizontally, 1.9 km in depth
Magnitude uncertainty
±0.08
Depth from
Operator assigned
Station coverage gap
129°
Stations used
28

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.6 and up: 12 in the 60 days after this one and 1 in the 30 days before it.

After

  1. 4.3127 km NE of Hihifo, Tonga · 2894 days ago · 10 km deep · 21 km away
  2. 4.7100 km NNE of Hihifo, Tonga · 2894 days ago · 19 km deep · 42 km away
  3. 4.9130 km NE of Hihifo, Tonga · 2889 days ago · 10 km deep · 23 km away
  4. 5.092 km NE of Hihifo, Tonga · 2887 days ago · 10 km deep · 26 km away
  5. 4.454 km ESE of Hihifo, Tonga · 2887 days ago · 126 km deep · 99 km away
  6. 4.539 km NNE of Hihifo, Tonga · 2884 days ago · 51 km deep · 74 km away
  7. 5.189 km NNE of Hihifo, Tonga · 2876 days ago · 10 km deep · 37 km away
  8. 4.3141 km SSW of Gataivai, Samoa · 2873 days ago · 10 km deep · 44 km away
  9. 4.916 km NE of Hihifo, Tonga · 2863 days ago · 46 km deep · 93 km away
  10. 4.795 km N of Hihifo, Tonga · 2862 days ago · 10 km deep · 86 km away
  11. 4.6Tonga · 2861 days ago · 10 km deep · 16 km away
  12. 4.7119 km NE of Hihifo, Tonga · 2858 days ago · 10 km deep · 13 km away

Before

  1. 4.397 km NE of Hihifo, Tonga · 2940 days ago · 10 km deep · 19 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000hcbi. Read Sun, Oct 4, 2026, 5:25 PM UTC.