Tonga earthquakes

M4.8 earthquake 107 km NNW of Hihifo, Tonga

A magnitude 4.8 earthquake struck 107 km NNW of Hihifo, Tonga on Wed, Sep 13, 2017, 9:38 AM GMT+13 (20:38 UTC), 148 km (92 mi) below the surface.

A larger quake followed: M5.6 98 km NNE of Hihifo, Tonga. This one was a foreshock.

Apia forecast More in Tonga

Map

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

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The earthquake

Magnitude: 4.8 (mb, body-wave), light
Magnitude from: USGS National Earthquake Information Center
Local time: Wed, Sep 13, 2017, 9:38 AM GMT+13
UTC: 2017-09-12 20:38:20 UTC
Depth: 148.0 km (92.0 mi), intermediate-depth
Epicenter: 15.076° S, 174.227° W
Region: Tonga
Tsunami flag: No
Status: Reviewed by a seismologist

Magnitude estimates

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.	Scale	Computed by	Notes
4.8	mb, body-wave	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.033 · 288 stations
5.12	Mw, moment	ISC-GEM global catalog	Final · ±0.1

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 9.0 km horizontally, 4.9 km in depth
Magnitude uncertainty: ±0.03
Depth from: From location
Station coverage gap: 70°
Stations used: 148

Nearest places

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

Apia, SamoaPopulation 40,407. Forecast299 kmWSW

Nearby

Within 100 km, magnitude 1.8 and up: 11 in the 60 days after this one and 3 in the 30 days before it.

After

Before

Earthquakes today Tonga earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us2000al2x (also filed as iscgem610972741). Read Sat, Oct 3, 2026, 1:07 AM UTC.