Tonga earthquakes

M4.5 earthquake 105 km ESE of Pangai, Tonga

A magnitude 4.5 earthquake struck 105 km ESE of Pangai, Tonga on Sat, Oct 21, 2017, 5:22 PM GMT+13 (04:22 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.7 130 km SSE of Pangai, Tonga. This one was a foreshock.

Nuku‘alofa forecastMore in Tonga

Map

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

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The earthquake

Magnitude
4.5 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2017-10-21 04:22:46 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
20.266° S, 173.468° 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 10.9 km horizontally, 1.9 km in depth
Magnitude uncertainty
±0.14
Depth from
Operator assigned
Station coverage gap
101°
Stations used
21

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 15 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 4.4114 km ESE of Pangai, Tonga · 3270 days ago · 10 km deep · 9 km away
  2. 4.677 km SE of Pangai, Tonga · 3263 days ago · 10 km deep · 39 km away
  3. 4.9137 km SE of Pangai, Tonga · 3251 days ago · 10 km deep · 41 km away
  4. 4.682 km SSE of Pangai, Tonga · 3244 days ago · 10 km deep · 60 km away
  5. 4.6137 km SE of Pangai, Tonga · 3237 days ago · 10 km deep · 49 km away
  6. 4.7102 km ESE of Pangai, Tonga · 3236 days ago · 10 km deep · 22 km away
  7. 4.6100 km ESE of Pangai, Tonga · 3234 days ago · 10 km deep · 7 km away
  8. 5.0111 km SE of Pangai, Tonga · 3230 days ago · 10 km deep · 49 km away
  9. 5.0132 km SSE of Pangai, Tonga · 3230 days ago · 10 km deep · 72 km away
  10. 5.7130 km SSE of Pangai, Tonga · 3219 days ago · 7 km deep · 68 km away
  11. 4.7117 km SE of Pangai, Tonga · 3218 days ago · 10 km deep · 35 km away
  12. 4.9137 km SSE of Pangai, Tonga · 3218 days ago · 10 km deep · 69 km away
  13. 4.6132 km E of Pangai, Tonga · 3218 days ago · 26 km deep · 45 km away
  14. 4.9111 km SE of Pangai, Tonga · 3216 days ago · 10 km deep · 28 km away
  15. 5.387 km SSE of Pangai, Tonga · 3211 days ago · 10 km deep · 55 km away

Before

  1. 4.4144 km E of Pangai, Tonga · 3271 days ago · 10 km deep · 74 km away
  2. 4.4133 km SE of Pangai, Tonga · 3273 days ago · 10 km deep · 54 km away
  3. 6.1103 km SE of Pangai, Tonga · 3273 days ago · 10 km deep · 50 km away · felt by 2
  4. 4.287 km SSE of Pangai, Tonga · 3293 days ago · 39 km deep · 64 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000axlq. Read Sun, Oct 4, 2026, 7:06 PM UTC.