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Strong mag. 5.5 earthquake - 94 km northwest of Arequipa, Peru, on Friday, Oct 8, 2021 at 11:47 pm (GMT -5) -

Strong mag. 5.5 earthquake - 94 km northwest of Arequipa, Peru, on Friday, Oct 8, 2021 at 11:47 pm (GMT -5) Strong mag. 5.5 earthquake - 94 km northwest of Arequipa, Peru, on Friday, Oct 8, 2021 at 11:47 pm (GMT -5)

Strong magnitude 5.5 earthquake at 10 km depth

9 Oct 04:54 UTC: First to report: GFZ after 6 minutes.
9 Oct 07:06: Magnitude recalculated from 5.3 to 5.5. Epicenter location corrected by 10.2 km (6.4 mi) towards NNW.
Update Sat, 9 Oct 2021, 05:00

Significant 5.3 quake hits near Arequipa, Provincia de Arequipa, Peru

5.3 quake 8 Oct 11:47 pm (GMT -5)
5.3 quake 8 Oct 11:47 pm (GMT -5)
An earthquake of magnitude 5.3 occurred late at night on Friday, October 8th, 2021, at 11:47 pm local time near Arequipa, Provincia de Arequipa, Peru, as reported by the German Research Centre for Geosciences (GFZ).
According to preliminary data, the quake was located at a shallow depth of 10 km. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
Our monitoring service identified a second report from the European-Mediterranean Seismological Centre (EMSC) which listed the quake at magnitude 5.1.
Based on the preliminary seismic data, the quake should have been widely felt by almost everyone in the area of the epicenter. It might have caused light to moderate damage.
Moderate shaking probably occurred in Pinchollo (pop. 580) located 11 km from the epicenter.
In Chivay (pop. 4,500) located 29 km from the epicenter, and Lluta (pop. 6,000) 38 km away, the quake should have been felt as light shaking.
Weak shaking might have been felt in Cono Norte (pop. 47,300) located 74 km from the epicenter, El Pedregal (pop. 20,100) 81 km away, Selva Alegre (pop. 72,700) 82 km away, Arequipa (pop. 841,100) 84 km away, Ciudad Satelite (pop. 76,400) 88 km away, and Jacobo Hunter (pop. 46,100) 88 km away.
VolcanoDiscovery will automatically update magnitude and depth if these change and follow up if other significant news about the quake become available. If you're in the area, please send us your experience through our reporting mechanism, either online or via our mobile app. This will help us provide more first-hand updates to anyone around the globe who wants to know more about this quake.

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Earthquake details

Date & timeOct 9, 2021 04:47:50 UTC -
Local time at epicenterFriday, Oct 8, 2021 at 11:47 pm (GMT -5)
StatusConfirmed
Magnitude5.5
Depth10.0 km
Epicenter latitude / longitude15.62°S / 71.88°W (Provincia de Caylloma, Arequipa, Peru)
Antipode15.62°N / 108.12°E
Shaking intensityLight shaking
Felt6 reports
Primary data sourceGFZ (German Research Centre for Geosciences)
Nearest volcanoSabancaya (8 km / 5 mi)
Nearby towns and cities4 km (3 mi) W of Pinchollo (pop: 579) | Show on map | Quakes nearby
30 km (19 mi) W of Chivay (pop: 4,540) | Show on map | Quakes nearby
46 km (29 mi) NNE of Lluta (Caylloma) (pop: 6,000) | Show on map | Quakes nearby
85 km (53 mi) NNW of Cono Norte (pop: 47,300) | Show on map | Quakes nearby
89 km (55 mi) NNE of El Pedregal (pop: 20,100) | Show on map | Quakes nearby
92 km (57 mi) NNW of Selva Alegre (pop: 72,700) | Show on map | Quakes nearby
94 km (59 mi) NNW of Arequipa (pop: 841,100) | Show on map | Quakes nearby
98 km (61 mi) NNW of Ciudad Satelite (pop: 76,400) | Show on map | Quakes nearby
98 km (61 mi) NNW of Jacobo Hunter (pop: 46,100) | Show on map | Quakes nearby
684 km (425 mi) SE of Lima (Lima Province) (pop: 7,737,000) | Show on map | Quakes nearby
Weather at epicenter at time of quakeOvercast Clouds -2.2°C (28 F), humidity: 75%, wind: 1 m/s (1 kts) from NNW
Estimated seismic energy released1.1 x 1013 joules (3.12 gigawatt hours, equivalent to 2682 tons of TNT or 0.2 atomic bombs!) | about seismic energy
Show interactive Map
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Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
Mag.DepthLocationSource
5.510 kmSouthern PeruGFZ
5.530 kmSOUTHERN PERUEMSC
5.625 kmSouthern PeruUSGS
5.442 kmSouthern PeruBMKG
5.730 kmSouthern PeruGeoAu
5.010 kmSouthern PeruUSP

Seismograms

Seismic station: Nana, Peru (NNA/II network) | Distance from quake: 671 km / 417 mi | Show on map | Station Info
Seismic station Nana, Peru: vertical movement plot around time of quake (source: IRIS/BUD)
Seismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Source: IRIS Buffer of Uniform Data (BUD) webtool
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User reports for this quake (6)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Contribute:
Leave a comment if you find a particular report interesting or want to add to it.
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Mark as helpful or interesting.
Send your own user report!
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Pinchollo (4.5 km E of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging : I’m on the second floor of a house and the house moved considerably 8 times but I felt it 10 times. Maybe I’m not super precise it’s the first time I live that. | One user found this interesting.  
Pinchollo (4.5 km E of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging : I’m on the second floor of a house and the house moved considerably 8 times but I felt it 10 times. Maybe I’m not super precise it’s the first time I live that.  
41 km of Chivay, Provincia de Caylloma, Arequipa (10.8 km W of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 5-10 s : Light shaking  
Cabanaconde / Moderate shaking (MMI V) / complex motion difficult to describe / 1-2 minutes
Cabanaconde / Moderate shaking (MMI V)
Yanque / Light shaking (MMI IV) / horizontal (sideways) swinging / 5-10 s

Aftershocks

[More info]

Recorded aftershocks, latest first (25 quakes)

Date and timeMag
Depth
LocationDetails
Dec 5, 2021 19:54
43 weeks ago
3.5

7 km
91 km NW of Arequipa, PeruMore
Dec 1, 2021 11:36
43 weeks ago
4.0

13 km
79 km NW of Cono Norte, Arequipa, PeruMore
Nov 22, 2021 14:29
45 weeks ago
3.6

13 km
86 km NW of Arequipa, PeruMore
Nov 22, 2021 10:23
45 weeks ago
3.8

12 km
88 km N of Arequipa, PeruMore
Nov 4, 2021 14:55
47 weeks ago
3.6

10 km
90 km NW of Arequipa, PeruMore
Oct 23, 2021 04:20
49 weeks ago
4.0

11 km
91 km NW of Arequipa, PeruMore
Oct 23, 2021 04:14
49 weeks ago
3.9

12 km
91 km NW of Arequipa, PeruMore
Oct 15, 2021 04:48
50 weeks ago
3.5

8 km
Arequipa, PeruMore
Oct 13, 2021 17:30
50 weeks ago
3.5

9 km
Arequipa, PeruMore
Oct 12, 2021 04:07
51 weeks ago
3.5

7 km
Arequipa, PeruMore
Oct 12, 2021 04:05
51 weeks ago
3.6

8 km
Arequipa, PeruMore
Oct 12, 2021 04:00
51 weeks ago
4.7

10 km
Arequipa, PeruMore
Oct 11, 2021 07:47
51 weeks ago
4.1

9 km
Arequipa, PeruMore
Oct 11, 2021 05:53
51 weeks ago
3.8

12 km
Arequipa, PeruMore
Oct 10, 2021 14:32
51 weeks ago
3.5

10 km
Arequipa, PeruMore
Oct 10, 2021 09:56
51 weeks ago
3.5

10 km
Arequipa, PeruMore
Oct 10, 2021 02:15
51 weeks ago
3.7

12 km
Arequipa, PeruMore
Oct 9, 2021 17:55
51 weeks ago
4.6

10 km
88 km N of Arequipa, PeruMore
Oct 9, 2021 14:46
51 weeks ago
3.8

8 km
94 km NW of Arequipa, PeruMore
Oct 9, 2021 11:25
51 weeks ago
3.5

12 km
95 km NW of Arequipa, PeruMore
Oct 9, 2021 09:40
51 weeks ago
3.9

12 km
84 km NW of Arequipa, PeruMore
Oct 9, 2021 07:41
51 weeks ago - felt
4.0

12 km
88 km NW of Arequipa, PeruMore
Oct 9, 2021 06:25
51 weeks ago
3.8

13 km
95 km NW of Arequipa, PeruMore
Oct 9, 2021 06:12
51 weeks ago
4.0

11 km
92 km NW of Arequipa, PeruMore
Oct 9, 2021 05:50
51 weeks ago
4.7

10 km
93 km N of Arequipa, PeruMore

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