M4.2 earthquake 89 km SW of San Antonio, Chile
A magnitude 4.2 earthquake struck 89 km SW of San Antonio, Chile on Tue, Oct 13, 2015, 6:29 AM GMT-3 (09:29 UTC), 12 km (7 mi) below the surface.
A larger quake followed: M4.4 102 km WNW of Cartagena, Chile. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.2 (mwr), light
- Local time
- UTC
- 2015-10-13 09:29:03 UTC
- Depth
- 11.9 km (7.4 mi), shallow
- Epicenter
- 34.085° S, 72.380° W
- Region
- Chile
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
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
- 4.2 Mwr
- Nodal plane 1
- Strike 41°, dip 43°, rake 106°
- Nodal plane 2
- Strike 199°, dip 49°, rake 76°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 3.4 km horizontally, 3.4 km in depth
- Magnitude uncertainty
- ±0.04
- Depth from
- From location
- Station coverage gap
- 63°
- Stations used
- 84
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 4 in the 30 days before it.
After
- 4.4102 km WNW of Cartagena, Chile · 4003 days ago · 10 km deep · 86 km away
- 4.4Near the coast of Libertador O'Higgins, Chile · 3989 days ago · 10 km deep · 90 km away
- 4.143 km W of Santa Cruz, Chile · 3988 days ago · 42 km deep · 85 km away
- 4.181 km WNW of Cartagena, Chile · 3979 days ago · 17 km deep · 85 km away
- 4.373 km N of Constitución, Chile · 3970 days ago · 10 km deep · 68 km away
- 4.292 km SW of San Antonio, Chile · 3961 days ago · 17 km deep · 10 km away
Before
- 4.272 km WNW of Cartagena, Chile · 4004 days ago · 20 km deep · 77 km away
- 4.336 km SW of San Antonio, Chile · 4014 days ago · 36 km deep · 53 km away · felt by 1
- 4.070 km WSW of San Antonio, Chile · 4023 days ago · 36 km deep · 20 km away
- 4.443 km WSW of San Antonio, Chile · 4031 days ago · 18 km deep · 48 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event us10003n8a. Read Tue, Sep 29, 2026, 1:48 AM UTC.