Moderate mag. 5.7 earthquake - Choapa, 34 km southwest of Illapel, Provincia de Choapa, Coquimbo Region, Chile, on Monday, 21 September 2015 at 19:56 (GMT)

This quake was likely an aftershock of the 7.8 quake Choapa, 36 km west of Illapel, Provincia de Choapa, Coquimbo Region, Chile, 16 September 2015 22:54 GMT, which had occurred 5 days earlier.
Moderate mag. 5.7 earthquake  - Choapa, 34 km southwest of Illapel, Provincia de Choapa, Coquimbo Region, Chile, on Monday, 21 September 2015 at 19:56 (GMT)

Moderate magnitude 5.7 earthquake at 31 km depth

21 Sep 20:00 UTC: First to report: GFZ after 4 minutes.
Hypocenter depth recalculated from 32.0 to 31.0 km.
Date & time: 21 Sep 2015 19:56:09 UTC
Magnitude: 5.7
Depth: 31.0 km
Epicenter latitude / longitude: 31.79°S / 71.48°W (Choapa, Coquimbo Region, Chile)
Nearby towns and cities:
34 km (21 mi) WSW of Illapel (Choapa, Coquimbo Region) (pop: 22,800) --> See nearby quakes!
49 km (30 mi) W of Salamanca (Choapa, Coquimbo Region) (pop: 13,300) --> See nearby quakes!
201 km (125 mi) NNW of Santiago (Santiago Metropolitan) (pop: 4,837,300) --> See nearby quakes!
211 km (131 mi) S of La Serena (Coquimbo Region) (pop: 154,500) --> See nearby quakes!
Primary data source: GFZ (German Research Centre for Geosciences)
Estimated released energy: 2.2 x 1013 joules (6.22 gigawatt hours, equivalent to 5351 tons of TNT or 0.3 atomic bombs!) More info
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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.
MagnitudeDepthLocationSource
M 5.731 kmNear Coast of Central ChileGFZ
M 5.831 km5.8 OFFSHORE COQUIMBO, CHILEEMSC
M 6.037 km18 km al NO de Los VilosGUG (U. Chile)

User reports for this quake (9)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Mendoza / Very weak shaking (MMI II)
Santlago / Moderate shaking (MMI V) : I felt it too
Santiago (197.6 km SSE of epicenter) [Map] / Light shaking (MMI IV) : Very fast. It lasted only a few seconds
Providencia (Chile, 206 km SE of epicenter) : I was on the second floor, taking a nap. Slept right through it. (reported through EMSC)
La Serena (Chile, 204 km N of epicenter) : gentle and short (reported through EMSC)
Valparaíso (Chile, 146 km S of epicenter) : movimiento ondulatorio, de unos 20-30seg (reported through EMSC)
Las Condes (Chile, 215 km SE of epicenter) : Piso 12 fuerte sacudida y vaiven en 2 tiempos (reported through EMSC)
(Chile, 214 km SE of epicenter) : Only felt a tiny trimmer here in Los Condes. (reported through EMSC)
La Serena (Chile, 203 km N of epicenter) : gentle swaying long (reported through EMSC)
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Earlier earthquakes in the same area

Moderate mag. 5.7 earthquake - Choapa, 34 km southwest of Illapel, Provincia de Choapa, Coquimbo Region, Chile, on Monday, 21 September 2015 at 19:56 (GMT)
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