Tonga earthquakes

M4.5 earthquake 139 km NNW of Neiafu, Tonga

A magnitude 4.5 earthquake struck 139 km NNW of Neiafu, Tonga on Sat, Jul 15, 2017, 6:46 PM GMT-12 (06:46 UTC), 80 km (50 mi) below the surface.

A larger quake followed: M4.7 145 km NW of Neiafu, Tonga. This one was a foreshock.

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The earthquake

Magnitude
4.5 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2017-07-16 06:46:52 UTC
Depth
80.3 km (49.9 mi), intermediate-depth
Epicenter
17.442° S, 174.364° 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 7.6 km horizontally, 8.6 km in depth
Magnitude uncertainty
±0.11
Depth from
From location
Station coverage gap
107°
Stations used
30

Nearby

Within 100 km, magnitude 1.5 and up: 5 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 4.1125 km SSW of Hihifo, Tonga · 3358 days ago · 130 km deep · 52 km away
  2. 4.7145 km NW of Neiafu, Tonga · 3358 days ago · 218 km deep · 67 km away
  3. 4.396 km N of Neiafu, Tonga · 3358 days ago · 10 km deep · 45 km away
  4. 4.490 km NW of Neiafu, Tonga · 3327 days ago · 77 km deep · 69 km away
  5. 4.5148 km NW of Neiafu, Tonga · 3325 days ago · 234 km deep · 68 km away

Before

  1. 4.1173 km NW of Neiafu, Tonga · 3367 days ago · 242 km deep · 61 km away
  2. 4.7131 km S of Hihifo, Tonga · 3369 days ago · 90 km deep · 59 km away
  3. 4.9109 km SSE of Hihifo, Tonga · 3389 days ago · 138 km deep · 100 km away
  4. 4.2156 km NNW of Neiafu, Tonga · 3392 days ago · 240 km deep · 40 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us20009yyd. Read Fri, Oct 2, 2026, 6:36 AM UTC.