Chile earthquakes

M3.7 earthquake 73 km WSW of Iquique, Chile

A magnitude 3.7 earthquake struck 73 km WSW of Iquique, Chile on Sun, Oct 3, 2021, 3:07 AM GMT-3 (06:07 UTC), 17 km (10 mi) below the surface.

A larger quake followed: M4.2 29 km SE of Iquique, Chile. This one was a foreshock.

Iquique forecastMore in Chile

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
3.7 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2021-10-03 06:07:28 UTC
Depth
16.7 km (10.4 mi), shallow
Epicenter
20.510° S, 70.775° W
Region
Chile
Felt reports
1
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

1 person reported to the USGS what they felt; the strongest reported shaking was II, weak shaking.

Did You Feel It? map: shaking reported by the public
Shaking reported by the public, by area. Map: USGS Did You Feel It?

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 5.0 km horizontally, 10.8 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
238°, poorly surrounded by stations
Stations used
15

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 8 in the 60 days after this one and 2 in the 30 days before it.

After

  1. 4.229 km SE of Iquique, Chile · 1824 days ago · 88 km deep · 82 km away · felt by 8
  2. 3.911 km NNE of Iquique, Chile · 1815 days ago · 47 km deep · 82 km away · felt by 9
  3. 4.044 km W of Iquique, Chile · 1811 days ago · 25 km deep · 42 km away · felt by 4
  4. 3.89 km SSW of Iquique, Chile · 1807 days ago · 41 km deep · 65 km away · felt by 6
  5. 2.720 km SE of Iquique, Chile · 1791 days ago · 54 km deep · 80 km away · felt by 1
  6. 3.984 km S of Iquique, Chile · 1785 days ago · 42 km deep · 71 km away · felt by 1
  7. 3.125 km WSW of Iquique, Chile · 1779 days ago · 39 km deep · 47 km away · felt by 2
  8. 2.621 km SW of Iquique, Chile · 1769 days ago · 46 km deep · 53 km away · felt by 2

Before

  1. 2.723 km SE of Iquique, Chile · 1840 days ago · 76 km deep · 81 km away · felt by 2
  2. 4.133 km W of Iquique, Chile · 1854 days ago · 24 km deep · 49 km away · felt by 9

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000fr9b. Read Sat, Oct 3, 2026, 2:07 AM UTC.