M4.1 earthquake 101 km SSE of Iquique, Chile
A magnitude 4.1 earthquake struck 101 km SSE of Iquique, Chile on Mon, Aug 2, 2021, 7:58 AM GMT-4 (11:58 UTC), 64 km (40 mi) below the surface.
A larger quake followed: M4.9 136 km ESE of Iquique, 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
- 2021-08-02 11:58:27 UTC
- Depth
- 64.3 km (40.0 mi), shallow
- Epicenter
- 21.058° S, 69.765° W
- Region
- Chile
- Felt reports
- 4
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
4 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
- Strike-slip
- Moment magnitude
- 4.1 Mwr
- Nodal plane 1
- Strike 25°, dip 36°, rake 172°
- Nodal plane 2
- Strike 122°, dip 85°, rake 54°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 4.5 km horizontally, 3.3 km in depth
- Magnitude uncertainty
- ±0.08
- Depth from
- From location
- Station coverage gap
- 116°
- Stations used
- 41
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 4 in the 30 days before it.
After
- 4.288 km NNW of Tocopilla, Chile · 1870 days ago · 21 km deep · 75 km away · felt by 1
- 4.9136 km ESE of Iquique, Chile · 1866 days ago · 103 km deep · 75 km away · felt by 9
- 4.288 km NNE of Tocopilla, Chile · 1859 days ago · 45 km deep · 35 km away · felt by 2
- 4.193 km ESE of Iquique, Chile · 1849 days ago · 94 km deep · 63 km away · felt by 4
- 2.723 km SE of Iquique, Chile · 1840 days ago · 76 km deep · 80 km away · felt by 2
- 4.270 km NNW of Tocopilla, Chile · 1832 days ago · 35 km deep · 93 km away
- 4.4138 km ESE of Iquique, Chile · 1830 days ago · 109 km deep · 79 km away · felt by 3
Before
- 4.2103 km ESE of Iquique, Chile · 1891 days ago · 101 km deep · 86 km away · felt by 5
- 4.283 km SSE of Iquique, Chile · 1900 days ago · 88 km deep · 20 km away · felt by 6
- 2.315 km SSE of Iquique, Chile · 1902 days ago · 32 km deep · 87 km away · felt by 2
- 4.184 km NNE of Tocopilla, Chile · 1911 days ago · 59 km deep · 38 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000f1gn. Read Fri, Oct 2, 2026, 8:23 PM UTC.