Tonga earthquakes

M4.4 earthquake 200 km SE of Hihifo, Tonga

A magnitude 4.4 earthquake struck 200 km SE of Hihifo, Tonga on Fri, Jul 31, 2015, 2:16 PM GMT+13 (01:16 UTC), 9 km (5 mi) below the surface.

A larger quake followed: M4.6 177 km ESE 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
4.4 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2015-07-31 01:16:53 UTC
Depth
8.7 km (5.4 mi), shallow
Epicenter
17.311° S, 172.556° 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.

Did You Feel It? map: shaking reported by the public
Shaking reported by the public, by area. Map: USGS Did You Feel It?

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 8.5 km horizontally, 4.1 km in depth
Magnitude uncertainty
±0.16
Depth from
From location
Station coverage gap
78°
Stations used
26

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 3 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 4.5139 km NE of Neiafu, Tonga · 4077 days ago · 50 km deep · 74 km away
  2. 4.6177 km ESE of Hihifo, Tonga · 4040 days ago · 10 km deep · 78 km away
  3. 4.4149 km NE of Neiafu, Tonga · 4025 days ago · 10 km deep · 65 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us100033bp. Read Mon, Oct 5, 2026, 2:46 PM UTC.