Chile earthquakes

M4.1 earthquake 90 km WNW of Iquique, Chile

A magnitude 4.1 earthquake struck 90 km WNW of Iquique, Chile on Wed, Sep 23, 2015, 8:16 PM GMT-3 (23:16 UTC), 12 km (7 mi) below the surface.

A larger quake followed: M4.5 77 km WSW 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
4.1 (mwr), light
Local time
UTC
2015-09-23 23:16:40 UTC
Depth
12.1 km (7.5 mi), shallow
Epicenter
19.979° S, 70.977° 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.

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

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 161°, dip 61°, rake 69°
Nodal plane 2
Strike 19°, dip 35°, rake 123°

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 4.3 km horizontally, 1.1 km in depth
Magnitude uncertainty
±0.05
Depth from
From location
Station coverage gap
146°
Stations used
54

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 9 in the 30 days before it.

After

  1. 4.480 km W of Iquique, Chile · 4019 days ago · 29 km deep · 40 km away
  2. 4.289 km WNW of Iquique, Chile · 4011 days ago · 13 km deep · 3 km away
  3. 4.577 km WSW of Iquique, Chile · 4001 days ago · 15 km deep · 70 km away · felt by 1
  4. 3.967 km WSW of Iquique, Chile · 3997 days ago · 17 km deep · 69 km away
  5. 4.179 km WNW of Iquique, Chile · 3986 days ago · 30 km deep · 14 km away
  6. 4.095 km WNW of Iquique, Chile · 3978 days ago · 18 km deep · 19 km away
  7. 3.999 km WNW of Iquique, Chile · 3978 days ago · 20 km deep · 18 km away

Before

  1. 4.1Near the coast of Tarapaca, Chile · 4031 days ago · 12 km deep · 23 km away
  2. 4.981 km WNW of Iquique, Chile · 4031 days ago · 9 km deep · 11 km away
  3. 4.987 km WNW of Iquique, Chile · 4031 days ago · 13 km deep · 4 km away · felt by 1
  4. 4.591 km WNW of Iquique, Chile · 4031 days ago · 16 km deep · 2 km away
  5. 4.974 km WNW of Iquique, Chile · 4032 days ago · 14 km deep · 15 km away
  6. 5.0Near the coast of Tarapaca, Chile · 4032 days ago · 10 km deep · 19 km away
  7. 4.285 km WNW of Iquique, Chile · 4032 days ago · 11 km deep · 6 km away
  8. 4.489 km WNW of Iquique, Chile · 4037 days ago · 15 km deep · 5 km away · felt by 1
  9. 3.9Near the coast of Tarapaca, Chile · 4048 days ago · 48 km deep · 90 km away · felt by 1

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us20003nik. Read Wed, Sep 30, 2026, 12:13 AM UTC.