M4.5 earthquake 21 km E of Calama, Chile
A magnitude 4.5 earthquake struck 21 km E of Calama, Chile on Sat, Oct 27, 2018, 12:46 PM GMT-3 (15:46 UTC), 110 km (68 mi) below the surface.
A larger quake followed: M4.9 90 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
- 4.5 (Mwr, regional moment), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2018-10-27 15:46:43 UTC
- Depth
- 109.8 km (68.2 mi), intermediate-depth
- Epicenter
- 22.481° S, 68.714° 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
- Strike-slip
- Moment magnitude
- 4.5 Mwr
- Nodal plane 1
- Strike 144°, dip 57°, rake 152°
- Nodal plane 2
- Strike 251°, dip 67°, rake 37°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 3.6 km horizontally, 4.2 km in depth
- Magnitude uncertainty
- ±0.05
- Depth from
- From location
- Station coverage gap
- 47°
- Stations used
- 30
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 13 in the 60 days after this one and 3 in the 30 days before it.
After
- 4.360 km NNE of Calama, Chile · 2896 days ago · 105 km deep · 59 km away · felt by 1
- 4.828 km ENE of Calama, Chile · 2892 days ago · 98 km deep · 19 km away · felt by 1
- 4.577 km NNE of Calama, Chile · 2886 days ago · 126 km deep · 74 km away
- 4.332 km SSW of Calama, Chile · 2876 days ago · 122 km deep · 44 km away
- 4.533 km NE of Calama, Chile · 2870 days ago · 122 km deep · 28 km away
- 4.443 km ESE of Calama, Chile · 2867 days ago · 135 km deep · 22 km away
- 4.990 km NE of Calama, Chile · 2853 days ago · 133 km deep · 83 km away
- 3.940 km NE of Calama, Chile · 2853 days ago · 114 km deep · 33 km away
- 4.190 km SSW of Calama, Chile · 2849 days ago · 94 km deep · 98 km away
- 4.288 km NNW of Calama, Chile · 2846 days ago · 106 km deep · 98 km away
- 4.176 km WSW of San Pedro de Atacama, Chile · 2843 days ago · 106 km deep · 91 km away
- 4.692 km NNE of Calama, Chile · 2841 days ago · 143 km deep · 91 km away
- 4.635 km N of Calama, Chile · 2838 days ago · 100 km deep · 45 km away
Before
Earthquakes todayChile earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us1000hi0k. Read Fri, Oct 2, 2026, 4:15 AM UTC.