Strong mag. 6.6 earthquake - Near Coast of Central Chile on Monday, 21 September 2015

Major magnitude 6.6 earthquake - Choapa, 26 km southwest of Illapel, Provincia de Choapa, Coquimbo Region, Chile, on Monday, September 21, 2015 at 17:39 (GMT)

This quake was likely an aftershock of the 7.8 quake Choapa, 36 km west of Illapel, Provincia de Choapa, Coquimbo Region, Chile, September, 16 2015 22:54 GMT, which had occurred 5 days earlier.
Major magnitude 6.6 earthquake - Choapa, 26 km southwest of Illapel, Provincia de Choapa, Coquimbo Region, Chile, on Monday, September 21, 2015 at 17:39 (GMT)

Major magnitude 6.6 earthquake at 10 km depth

21 Sep 17:44 UTC: First to report: GFZ after 4 minutes.
Sep 21 17:49: Magnitude recalculated from 6.7 to 6.6.
Hypocenter depth recalculated from 29.0 to 10.0 km.
Date & time: Sep 21, 2015 17:39:57 UTC
Magnitude: 6.6
Depth: 10.0 km
Epicenter latitude / longitude: 31.74°S / 71.41°W (Choapa, Coquimbo Region, Chile)
Antipode: 31.74°N / 108.59°E
Nearest volcano: Tupungatito (247 km / 153 mi)
Nearby towns and cities:
26 km (16 mi) WSW of Illapel (Choapa) (pop: 22,800) --> See nearby quakes!
42 km (26 mi) W of Salamanca (Choapa) (pop: 13,300) --> See nearby quakes!
81 km (50 mi) NNW of La Ligua (Petorca, Valparaíso) (pop: 24,900) --> See nearby quakes!
128 km (80 mi) S of Ovalle (Coquimbo Region) (pop: 77,100) --> See nearby quakes!
143 km (89 mi) N of Viña del Mar (Valparaíso) (pop: 294,600) --> See nearby quakes!
145 km (90 mi) N of Quilpué (Valparaíso) (pop: 130,300) --> See nearby quakes!
146 km (90 mi) N of Valparaiso (Valparaíso) (pop: 282,400) --> See nearby quakes!
204 km (127 mi) NNW of Santiago (Santiago Metropolitan) (pop: 4,837,300) --> See nearby quakes!
205 km (127 mi) S of La Serena (pop: 154,500) --> See nearby quakes!
222 km (138 mi) NNW of Puente Alto (Santiago Metropolitan) (pop: 510,400) --> See nearby quakes!
Primary data source: GFZ (German Research Centre for Geosciences)
Estimated released energy: 5 x 1014 joules (139 gigawatt hours, equivalent to 1.2 x 105 tons of TNT or 7.5 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.
Mag.DepthLocationSource
6.610 kmNear Coast of Central ChileGFZ
6.634 km6.6 COQUIMBO, CHILEEMSC
6.713 km17 km al N de Los VilosGUG (U. Chile)
6.634 kmSW of Illapel, ChileGeoAu

User reports for this quake (33)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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La Serena, Chile / Moderate shaking (MMI V) : Movimiento sísmico brusco y sostenido de menos a más de forma horizontal en forma de olas.  
Rancagua (278.7 km SSE of epicenter) [Map] / Light shaking (MMI IV)
La Serena (202.5 km N of epicenter) [Map] / Moderate shaking (MMI V)
Rancagua (278.7 km SSE of epicenter) [Map] / Light shaking (MMI IV)
Santiago (201.8 km SSE of epicenter) [Map] / Very weak shaking (MMI II)
Coquimbo, Chile / Moderate shaking (MMI V)
Crowne Plaza Hotel Santiago Chile (202.3 km SSE of epicenter) [Map] / Weak shaking (MMI III) : Did not immediately realise what it was. On 18th floor of hotel. Minor swinging of mirrors and hanging fittings. More alarming was sound of creaking from windows. Lasted about 40 seconds to a minute  
Santiago de Chile / Weak shaking (MMI III)
rancagua, chile (278 km SSE of epicenter) [Map] / Light shaking (MMI IV) : it was just a short event .. the earth moved twice ..   
Providencia (Chile, 210 km SE of epicenter) : Si slowly (reported through EMSC)  
(Chile, 208 km S of epicenter) : Otro más (reported through EMSC)  
Las Condes (Chile, 207 km SE of epicenter) : Piso 12 fuerte primero sacudido despues vaiven (reported through EMSC)  
Las Condes (Chile, 207 km SE of epicenter) : Si piso 12 avise antes. Fuerte movimiento y bslaceo de cortinas y lamparas (reported through EMSC)  
Valparaíso (Chile, 150 km S of epicenter) : Se sintió fuerte (reported through EMSC)  
Viña del Mar (Chile, 144 km S of epicenter) : Se sintio fuerte en viña (reported through EMSC)  
Quintero (Chile, 121 km S of epicenter) : Sigue temblando...las réplicas se sienten muy a menudo. Tranquilidad y preparación. (reported through EMSC)  
Córdoba (Argentina, 693 km E of epicenter) : En Córdoba Argentina , en un piso 10 el edificio bailó un poco (reported through EMSC)  
San Juan (Argentina, 277 km E of epicenter) : Leve, de corta duración, se aprecia movimiento en colgantes y puertas, No hay daños. Mi ubicación es, San Juan Argentina. (reported through EMSC)  
Ñuñoa (Chile, 210 km SE of epicenter) : Es el tercer sismo sobre grado 6 en este d (reported through EMSC)  
Providencia (Chile, 207 km SE of epicenter) : I was on the 2nd floor, just felt a bit of trembling. Some of the neighbours stepped into the hallway to talk it over, but I didn't bother. I don't think anyone actually went outside. (reported through EMSC)  
La Serena (Chile, 201 km N of epicenter) : Movimiento de vaivén, en un momento se sentia fuerte, duracion aproximada de 1 minuto, movimiento de las caracteristicas pero no de la intensidad del terremoto 8.3. La mayoria de las replicas han sido sin sonido (reported through EMSC)  
Concón (Chile, 135 km S of epicenter) : Another of many aftershock/quakes. My son was trying to open our front door when it hit. He initially thought there was a problem with the door. By the time he got it open the strong part hit and he stepped back outside until it was (reported through EMSC)  
Puente Alto (Chile, 223 km SE of epicenter) : Was an horizontal movement and the electrical wires were moving in the lamp post. (reported through EMSC)  
Santiago (Chile, 207 km S of epicenter) : Forte secousse a Santiago du Chili (reported through EMSC)  
(Argentina, 220 km SE of epicenter) : Se tambaleo la ruta (reported through EMSC)  
Las Condes (Chile, 210 km SE of epicenter) : Lasted about 7 seconds (reported through EMSC)  
(Chile, 208 km S of epicenter) : Vertical y luego más intenso (reported through EMSC)  
Providencia (Chile, 208 km S of epicenter) : Felt it pretty strong (reported through EMSC)  
Providencia (Chile, 208 km S of epicenter) : Se sintio fuerte en el piso 8 en santiago. (reported through EMSC)  
Santiago (Chile, 207 km S of epicenter) : estoi en un 3¤ piso, se sintio muy fuerte. (reported through EMSC)  
La Serena (Chile, 198 km N of epicenter) : fairly strong and long lasting. (reported through EMSC)  
Coquimbo (Chile, 191 km N of epicenter) : Movimiento horizontal muy brusco (reported through EMSC)  
Viña del Mar (Chile, 149 km S of epicenter) : Pueden ser movimientos nuevos o replicas del temblor fuerte del miércoles 16. (reported through EMSC)  
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