Chile earthquakes

M4.7 earthquake 54 km W of Iquique, Chile

A magnitude 4.7 earthquake struck 54 km W of Iquique, Chile on Tue, Jul 23, 2013, 1:27 PM GMT-4 (17:27 UTC), 19 km (11 mi) below the surface.

A larger quake followed: M5.2 58 km W of Iquique, Chile. This one was a foreshock.

Iquique forecast More in Chile

Map

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

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The earthquake

Magnitude: 4.7 (mb, body-wave), light
Magnitude from: USGS National Earthquake Information Center
Local time: Tue, Jul 23, 2013, 1:27 PM GMT-4
UTC: 2013-07-23 17:27:15 UTC
Depth: 18.5 km (11.5 mi), shallow
Epicenter: 20.200° S, 70.674° W
Region: Chile
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
4.7	mb, body-wave	USGS National Earthquake Information Center	Preferred · Reviewed · 84 stations
5.08	Mw, moment	ISC-GEM global catalog	Final · ±0.1
4.9	Mwr, regional moment	USGS National Earthquake Information Center	Moment tensor · Reviewed

What happened

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

Felt (III) at La Tirana; (II) at Alto Hospicio, Camina, Huara, Iquique and Pozo Almonte.

From the USGS event page for usb000ikuf. 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)
Moment magnitude: 4.9 Mwr
Nodal plane 1: Strike 178°, dip 90°, rake 84°
Nodal plane 2: Strike 85°, dip 6°, rake 177°

How well it is located

Reviewed by a seismologist.

Station coverage gap: 99°
Stations used: 106

Nearest places

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

Nearby

Within 100 km, magnitude 1.7 and up: 10 in the 60 days after this one and 3 in the 30 days before it.

After

Before

Earthquakes today Chile earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event usb000ikuf (also filed as iscgem603247785). Read Fri, Oct 2, 2026, 11:47 PM UTC.