Light mag. 3.9 earthquake - 91 km northwest of Arequipa, Peru, on Friday, Oct 22, 2021 at 11:14 pm (GMT -5) -
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Light magnitude 3.9 earthquake at 12 km depth
23 Oct 04:22 UTC: First to report: EMSC after 8 minutes.
Local time at epicenter: Friday, Oct 22, 2021 at 11:14 pm (GMT -5)
Magnitude: 3.9
Depth: 12.0 km
Epicenter latitude / longitude: 15.7°S / 71.98°W

Antipode: 15.7°N / 108.02°E
Nearest volcano: Sabancaya (17 km / 11 mi)
Nearby towns and cities:
13 km (8 mi) E of Chinini (Caylloma) (pop: 159) --> See nearby quakes!
35 km (22 mi) N of Lluta (Caylloma) (pop: 6,000) --> See nearby quakes!
41 km (26 mi) W of Chivay (pop: 4,540) --> See nearby quakes!
77 km (48 mi) NNE of El Pedregal (pop: 20,100) --> See nearby quakes!
81 km (51 mi) NNW of Cono Norte (pop: 47,300) --> See nearby quakes!
89 km (55 mi) NW of Selva Alegre (pop: 72,700) --> See nearby quakes!
91 km (57 mi) NNW of Arequipa (pop: 841,100) --> See nearby quakes!
94 km (59 mi) NNW of Jacobo Hunter (pop: 46,100) --> See nearby quakes!
94 km (59 mi) NNW of Ciudad Satelite (pop: 76,400) --> See nearby quakes!
680 km (423 mi) SE of Lima (Lima Province) (pop: 7,737,000) --> See nearby quakes!
Weather at epicenter at time of quake:
Broken Clouds
2.7°C (37 F), humidity: 33%, wind: 1 m/s (1 kts) from N
Primary data source: EMSC (European-Mediterranean Seismological Centre)
Broken Clouds

Estimated released energy: 4.5 x 1010 joules (12.4 megawatt hours, equivalent to 10.7 tons of TNT) | about seismic energy
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 |
3.9 | 12 km | SOUTHERN PERU | EMSC |
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Earlier earthquakes in the same area
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