Tonga earthquakes

M4.4 earthquake 150 km N of Neiafu, Tonga

A magnitude 4.4 earthquake struck 150 km N of Neiafu, Tonga on Thu, Apr 20, 2017, 4:48 PM GMT-12 (04:48 UTC), 126 km (78 mi) below the surface.

A larger quake followed: M5.3 132 km SSE of Hihifo, Tonga. This one was a foreshock.

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

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The earthquake

Magnitude
4.4 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2017-04-21 04:48:41 UTC
Depth
125.6 km (78.1 mi), intermediate-depth
Epicenter
17.304° S, 174.173° 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 11.3 km horizontally, 8.3 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
66°
Stations used
37

Nearby

Within 100 km, magnitude 1.5 and up: 11 in the 60 days after this one and 2 in the 30 days before it.

After

  1. 4.6131 km NNE of Neiafu, Tonga · 3441 days ago · 40 km deep · 95 km away
  2. 4.4157 km SSW of Hihifo, Tonga · 3441 days ago · 157 km deep · 40 km away
  3. 4.4145 km NW of Neiafu, Tonga · 3441 days ago · 244 km deep · 98 km away
  4. 4.6137 km NNE of Neiafu, Tonga · 3440 days ago · 11 km deep · 57 km away
  5. 4.3111 km SSW of Hihifo, Tonga · 3428 days ago · 148 km deep · 51 km away
  6. 4.993 km SSE of Hihifo, Tonga · 3428 days ago · 22 km deep · 86 km away
  7. 4.4108 km SSW of Hihifo, Tonga · 3422 days ago · 95 km deep · 49 km away
  8. 5.3132 km SSE of Hihifo, Tonga · 3420 days ago · 10 km deep · 71 km away
  9. 4.567 km S of Hihifo, Tonga · 3419 days ago · 73 km deep · 89 km away
  10. 4.784 km NW of Neiafu, Tonga · 3399 days ago · 10 km deep · 84 km away
  11. 4.2156 km NNW of Neiafu, Tonga · 3392 days ago · 240 km deep · 63 km away

Before

  1. 4.4151 km SSW of Hihifo, Tonga · 3456 days ago · 104 km deep · 13 km away
  2. 4.3149 km NW of Neiafu, Tonga · 3477 days ago · 219 km deep · 70 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us10008jg1. Read Fri, Oct 2, 2026, 9:54 AM UTC.