Tonga earthquakes

M5.6 earthquake Tonga

A magnitude 5.6 earthquake struck in Tonga on Wed, Jul 5, 2006, 4:44 PM GMT+13 (03:44 UTC), 26 km (16 mi) below the surface.

Nuku‘alofa 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: 5.6 (Mwc, centroid moment), moderate
Magnitude from: USGS National Earthquake Information Center
Local time: Wed, Jul 5, 2006, 4:44 PM GMT+13
UTC: 2006-07-05 03:44:10 UTC
Depth: 25.6 km (15.9 mi), shallow
Epicenter: 20.565° S, 174.125° 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
5.6	Mwc, centroid moment	USGS National Earthquake Information Center	Preferred · Reviewed
5.64	Mw, moment	ISC-GEM global catalog	Final · ±0.1
5.6	Mwc, centroid moment	Global CMT project	Preliminary

What happened

The USGS’s account of the effects of this earthquake.

no people dead or missing; no people injured; no buildings damaged or destroyed

From the USGS event page for usp000emxj. U.S. Geological Survey text and figures are in the public domain.

Did you feel it?

No one has reported feeling this quake to the USGS.

Fault motion and ground failure

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Faulting: Reverse (thrust)
Nodal plane 1: Strike 185°, dip 27°, rake 81°
Nodal plane 2: Strike 14°, dip 63°, rake 94°

How well it is located

Reviewed by a seismologist.

Depth from: CONSTRAINED_BY_DEPTH_PHASES
Station coverage gap: 38°
Stations used: 204

Nearest places

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

Nuku‘alofa, TongaPopulation 22,400. Forecast129 kmENE

Nearby

Within 100 km, magnitude 2.6 and up: 10 in the 60 days after this one and 19 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 usp000emxj (also filed as gcmtc200607050344a, gcmt20060705034410, iscgem10699253). Read Sun, Oct 4, 2026, 10:46 PM UTC.