Chile earthquakes

M4.9 earthquake 85 km WSW of San Antonio, Chile

A magnitude 4.9 earthquake struck 85 km WSW of San Antonio, Chile on Mon, Oct 31, 2016, 8:15 AM GMT-3 (11:15 UTC), 9 km (6 mi) below the surface.

San Antonio 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: 4.9 (Mww, W-phase moment), light
Magnitude from: USGS National Earthquake Information Center
Local time: Mon, Oct 31, 2016, 8:15 AM GMT-3
UTC: 2016-10-31 11:15:47 UTC
Depth: 9.4 km (5.8 mi), shallow
Epicenter: 33.760° S, 72.511° W
Region: Chile
Felt reports: 5
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
4.9	Mww, W-phase moment	USGS National Earthquake Information Center	Preferred · Reviewed
5.04	Mw, moment	ISC-GEM global catalog	Final · ±0.1
4.8	Mwr, regional moment	USGS National Earthquake Information Center	Moment tensor · Reviewed

What happened

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

Felt (II) at San Antonio. Also felt at Llaillay.

From the USGS event page for us1000738c. U.S. Geological Survey text and figures are in the public domain.

Did you feel it?

5 people reported to the USGS what they felt; the strongest reported shaking was III, weak shaking.

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 Mww
Nodal plane 1: Strike 181°, dip 68°, rake 89°
Nodal plane 2: Strike 4°, dip 22°, rake 92°

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 4.4 km horizontally, 3.0 km in depth
Depth from: From location
Station coverage gap: 121°
Stations used: 114

Nearest places

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

Nearby

Within 100 km, magnitude 1.9 and up: 2 in the 60 days after this one and 4 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 us1000738c (also filed as iscgem609632165). Read Fri, Oct 2, 2026, 11:49 AM UTC.