M4.3 earthquake 69 km W of San Antonio, Chile
A magnitude 4.3 earthquake struck 69 km W of San Antonio, Chile on Tue, Sep 1, 2015, 9:22 PM GMT-3 (00:22 UTC), 35 km (22 mi) below the surface.
A larger quake followed: M4.4 43 km WSW of San Antonio, Chile. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.3 (mwr), light
- Local time
- UTC
- 2015-09-02 00:22:37 UTC
- Depth
- 35.3 km (22.0 mi), shallow
- Epicenter
- 33.691° S, 72.353° W
- Region
- Chile
- Felt reports
- 2
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
2 people reported to the USGS what they felt; the strongest reported shaking was II, weak shaking.
Fault motion and ground failure
How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.
- Faulting
- Oblique normal
- Moment magnitude
- 4.3 Mwr
- Nodal plane 1
- Strike 348°, dip 62°, rake -124°
- Nodal plane 2
- Strike 223°, dip 43°, rake -44°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 4.4 km horizontally, 5.3 km in depth
- Magnitude uncertainty
- ±0.05
- Depth from
- From location
- Station coverage gap
- 59°
- Stations used
- 64
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 14 in the 60 days after this one and 0 in the 30 days before it.
After
- 4.443 km WSW of San Antonio, Chile · 4026 days ago · 18 km deep · 30 km away
- 4.343 km W of Valparaíso, Chile · 4022 days ago · 25 km deep · 72 km away
- 4.040 km W of Valparaíso, Chile · 4021 days ago · 17 km deep · 76 km away
- 4.448 km W of Valparaíso, Chile · 4020 days ago · 12 km deep · 73 km away · felt by 1
- 4.070 km WSW of San Antonio, Chile · 4017 days ago · 36 km deep · 29 km away
- 4.375 km WNW of Valparaíso, Chile · 4015 days ago · 10 km deep · 88 km away
- 4.351 km W of Valparaíso, Chile · 4013 days ago · 19 km deep · 76 km away · felt by 2
- 4.145 km W of Valparaíso, Chile · 4012 days ago · 23 km deep · 75 km away · felt by 1
- 4.6Off the coast of Valparaiso, Chile · 4012 days ago · 15 km deep · 77 km away · felt by 1
- 4.336 km SW of San Antonio, Chile · 4009 days ago · 36 km deep · 42 km away · felt by 1
- 4.054 km WNW of Valparaíso, Chile · 4009 days ago · 14 km deep · 99 km away · felt by 1
- 4.272 km WNW of Cartagena, Chile · 3999 days ago · 20 km deep · 33 km away
- 4.289 km SW of San Antonio, Chile · 3998 days ago · 12 km deep · 44 km away
- 4.4102 km WNW of Cartagena, Chile · 3997 days ago · 10 km deep · 48 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event us20003fk2. Read Wed, Sep 23, 2026, 5:21 PM UTC.