M4.5 earthquake 88 km WSW of San Antonio, Chile
A magnitude 4.5 earthquake struck 88 km WSW of San Antonio, Chile on Thu, Dec 21, 2017, 11:20 AM GMT-3 (14:20 UTC), 10 km (6 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.5 (mwr), light
- Local time
- UTC
- 2017-12-21 14:20:59 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 33.883° S, 72.498° W
- Region
- Chile
- Felt reports
- 18
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
18 people reported to the USGS what they felt; the strongest reported shaking was V, moderate 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
- 4.5 Mwr
- Nodal plane 1
- Strike 19°, dip 33°, rake 114°
- Nodal plane 2
- Strike 172°, dip 60°, rake 75°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 2.5 km horizontally, 1.9 km in depth
- Magnitude uncertainty
- ±0.04
- Depth from
- Operator assigned
- Station coverage gap
- 175°
- Stations used
- 42
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 0 in the 60 days after this one and 2 in the 30 days before it.
Before
Earthquakes todayChile earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us1000buex. Read Wed, Sep 30, 2026, 2:07 AM UTC.