Tonga earthquakes

M4.8 earthquake 99 km ENE of Hihifo, Tonga

A magnitude 4.8 earthquake struck 99 km ENE of Hihifo, Tonga on Mon, Apr 16, 2018, 10:15 AM GMT+13 (21:15 UTC), 71 km (44 mi) below the surface.

A larger quake followed: M5.8 141 km SSW of Gataivai, Samoa. 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
4.8 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2018-04-15 21:15:09 UTC
Depth
70.6 km (43.9 mi), intermediate-depth
Epicenter
15.462° S, 173.023° 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 8.9 km horizontally, 8.1 km in depth
Magnitude uncertainty
±0.04
Depth from
From location
Station coverage gap
99°
Stations used
166

Nearest places

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

Nearby

Within 100 km, magnitude 1.8 and up: 17 in the 60 days after this one and 3 in the 30 days before it.

After

  1. 4.5103 km NNE of Hihifo, Tonga · 3091 days ago · 35 km deep · 44 km away
  2. 4.563 km N of Hihifo, Tonga · 3085 days ago · 55 km deep · 75 km away
  3. 4.680 km NE of Hihifo, Tonga · 3074 days ago · 10 km deep · 23 km away
  4. 4.663 km ESE of Hihifo, Tonga · 3066 days ago · 10 km deep · 93 km away
  5. 5.2130 km ENE of Hihifo, Tonga · 3059 days ago · 10 km deep · 31 km away
  6. 4.567 km NE of Hihifo, Tonga · 3057 days ago · 35 km deep · 43 km away
  7. 4.7140 km ENE of Hihifo, Tonga · 3057 days ago · 10 km deep · 44 km away
  8. 4.599 km NNE of Hihifo, Tonga · 3045 days ago · 33 km deep · 54 km away
  9. 5.8141 km SSW of Gataivai, Samoa · 3044 days ago · 10 km deep · 58 km away
  10. 5.4133 km NNE of Hihifo, Tonga · 3044 days ago · 10 km deep · 61 km away
  11. 4.698 km E of Hihifo, Tonga · 3043 days ago · 35 km deep · 74 km away
  12. 4.586 km NNE of Hihifo, Tonga · 3042 days ago · 10 km deep · 50 km away
  13. 5.0Samoa Islands region · 3037 days ago · 10 km deep · 66 km away
  14. 4.677 km ESE of Hihifo, Tonga · 3036 days ago · 10 km deep · 96 km away
  15. 4.378 km ESE of Hihifo, Tonga · 3036 days ago · 39 km deep · 83 km away
  16. 4.5129 km NNE of Hihifo, Tonga · 3035 days ago · 25 km deep · 70 km away
  17. 4.4119 km N of Hihifo, Tonga · 3032 days ago · 31 km deep · 88 km away

Before

  1. 4.475 km ESE of Hihifo, Tonga · 3093 days ago · 35 km deep · 81 km away
  2. 5.192 km NNE of Hihifo, Tonga · 3107 days ago · 10 km deep · 54 km away
  3. 4.791 km ESE of Hihifo, Tonga · 3115 days ago · 10 km deep · 93 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us2000e0p8. Read Fri, Oct 2, 2026, 11:16 AM UTC.