M4.1 earthquake 33 km W of Iquique, Chile
A magnitude 4.1 earthquake struck 33 km W of Iquique, Chile on Sun, Sep 5, 2021, 9:25 AM GMT-3 (12:25 UTC), 24 km (15 mi) below the surface.
A larger quake followed: M4.3 94 km S of Arica, Chile. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.1 (Mwr, regional moment), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2021-09-05 12:25:41 UTC
- Depth
- 23.8 km (14.8 mi), shallow
- Epicenter
- 20.174° S, 70.472° W
- Region
- Chile
- Felt reports
- 9
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
9 people reported to the USGS what they felt; the strongest reported shaking was III, weak 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
- 4.1 Mwr
- Nodal plane 1
- Strike 359°, dip 54°, rake 69°
- Nodal plane 2
- Strike 213°, dip 41°, rake 117°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 3.1 km horizontally, 4.9 km in depth
- Magnitude uncertainty
- ±0.05
- Depth from
- From location
- Station coverage gap
- 139°
- Stations used
- 63
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 5 in the 30 days before it.
After
- 2.723 km SE of Iquique, Chile · 1840 days ago · 76 km deep · 53 km away · felt by 2
- 4.394 km S of Arica, Chile · 1828 days ago · 34 km deep · 96 km away · felt by 2
- 3.773 km WSW of Iquique, Chile · 1826 days ago · 17 km deep · 49 km away · felt by 1
- 4.229 km SE of Iquique, Chile · 1824 days ago · 88 km deep · 58 km away · felt by 8
- 3.911 km NNE of Iquique, Chile · 1815 days ago · 47 km deep · 39 km away · felt by 9
- 4.044 km W of Iquique, Chile · 1811 days ago · 25 km deep · 10 km away · felt by 4
- 3.89 km SSW of Iquique, Chile · 1807 days ago · 41 km deep · 31 km away · felt by 6
Before
- 2.826 km WSW of Iquique, Chile · 1860 days ago · 32 km deep · 21 km away · felt by 1
- 4.182 km NNE of Iquique, Chile · 1871 days ago · 63 km deep · 97 km away · felt by 3
- 3.351 km NNE of Iquique, Chile · 1873 days ago · 50 km deep · 68 km away · felt by 6
- 4.141 km NNE of Iquique, Chile · 1876 days ago · 67 km deep · 62 km away · felt by 5
- 4.3127 km WNW of Iquique, Chile · 1878 days ago · 10 km deep · 94 km away · felt by 2
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000f894. Read Sat, Oct 3, 2026, 2:08 AM UTC.