M4.0 earthquake 32 km SSE of Calama, Chile
A magnitude 4.0 earthquake struck 32 km SSE of Calama, Chile on Sun, Oct 29, 2017, 9:20 AM GMT-3 (12:20 UTC), 98 km (61 mi) below the surface.
A larger quake followed: M4.8 45 km NE of Calama, Chile. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.0 (mb), light
- Local time
- UTC
- 2017-10-29 12:20:11 UTC
- Depth
- 97.7 km (60.7 mi), intermediate-depth
- Epicenter
- 22.742° S, 68.848° 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.
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 5.2 km horizontally, 7.1 km in depth
- Magnitude uncertainty
- ±0.30
- Depth from
- From location
- Station coverage gap
- 71°
- Stations used
- 17
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 7 in the 60 days after this one and 6 in the 30 days before it.
After
- 4.845 km NE of Calama, Chile · 3250 days ago · 125 km deep · 70 km away
- 4.142 km NE of Calama, Chile · 3248 days ago · 134 km deep · 69 km away
- 4.558 km NNE of Calama, Chile · 3238 days ago · 117 km deep · 88 km away
- 4.0103 km SW of San Pedro de Atacama, Chile · 3230 days ago · 130 km deep · 89 km away
- 3.961 km NNE of Calama, Chile · 3229 days ago · 122 km deep · 89 km away
- 4.041 km S of Calama, Chile · 3216 days ago · 110 km deep · 10 km away
- 4.170 km S of Calama, Chile · 3214 days ago · 97 km deep · 39 km away
Before
- 4.172 km S of Calama, Chile · 3265 days ago · 100 km deep · 44 km away
- 4.042 km SW of Calama, Chile · 3267 days ago · 87 km deep · 33 km away
- 4.5Antofagasta, Chile · 3273 days ago · 112 km deep · 14 km away
- 5.542 km ENE of Calama, Chile · 3283 days ago · 110 km deep · 53 km away · felt by 5
- 4.821 km S of San Pedro de Atacama, Chile · 3284 days ago · 129 km deep · 77 km away · felt by 2
- 4.433 km NE of Calama, Chile · 3285 days ago · 107 km deep · 58 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event us1000ayah. Read Wed, Sep 30, 2026, 11:14 PM UTC.