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Moderate mag. 4.0 earthquake - 91 km northwest of Arequipa, Peru, on Friday, Oct 22, 2021 at 11:20 pm (GMT -5)

Moderate magnitude 4.0 earthquake at 11 km depth

23 Oct 04:27 UTC: First to report: EMSC after 7 minutes.

Earthquake details

Date & time	Oct 23, 2021 04:20:41 UTC
Local time at epicenter	Friday, Oct 22, 2021 at 11:20 pm (GMT -5)
Status	Confirmed
Magnitude	4
Depth	11.0 km
Epicenter latitude / longitude	15.7°S / 71.98°W (Provincia de Caylloma, Arequipa, Peru)
Antipode	15.7°N / 108.02°E
Shaking intensity	Light shaking near epicenter
Felt	0 reports
Primary data source	EMSC (European-Mediterranean Seismological Centre)
Nearest volcano	Sabancaya (17 km / 11 mi)
Nearby towns and cities	13 km (8 mi) E of Chinini (Caylloma) (pop: 159) \| Show on map \| Quakes nearby 35 km (22 mi) N of Lluta (Caylloma) (pop: 6,000) \| Show on map \| Quakes nearby 41 km (26 mi) W of Chivay (pop: 4,540) \| Show on map \| Quakes nearby 56 km (35 mi) W of Huarancante (pop: 4,640) \| Show on map \| Quakes nearby 57 km (35 mi) WSW of Ccolo (pop: 3,860) \| Show on map \| Quakes nearby 62 km (38 mi) SE of Orcopampa (Castilla) (pop: 5,640) \| Show on map \| Quakes nearby 69 km (43 mi) NNW of Yura (Arequipa) (pop: 5,690) \| Show on map \| Quakes nearby 81 km (51 mi) NNW of Cono Norte (pop: 47,300) \| Show on map \| Quakes nearby 91 km (57 mi) NNW of Arequipa (pop: 841,100) \| Show on map \| Quakes nearby 680 km (423 mi) SE of Lima (Lima Province) (pop: 7,737,000) \| Show on map \| Quakes nearby
Weather at epicenter at time of quake	Broken Clouds 2.7°C (37 F), humidity: 33%, wind: 1 m/s (1 kts) from N
Estimated seismic energy released	6.3 x 10¹⁰ joules (17.5 megawatt hours, equivalent to 15.1 tons of TNT) \| about seismic energy

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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.	Depth	Location	Source
4.0	11 km	SOUTHERN PERU	EMSC

Most recent quakes Top 20 past 24 hrs Quakes in Peru

Seismograms

Seismic station: Chusmiza, Chile (GO01/C network) | Distance from quake: 531 km / 330 mi | Show on map | Station Info

Seismic station Chusmiza, Chile: 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. Bandpass filter applied: 0.2-5.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool

User reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.

There are no user reports for this quake.

Earlier earthquakes in the same area

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