Moderate mag. 4.0 earthquake - Departamento de Sarmiento, 34 km southwest of Pocito, San Juan, Argentina, on Tuesday, 19 Jan 2021 12:51 am (GMT -3) -

This quake was likely an aftershock of the 6.4 quake Departamento de Sarmiento, 20 km southwest of Pocito, San Juan, Argentina, 18 Jan 2021 11:46 pm (GMT -3), which had occurred 1 hour and 6 minutes earlier.
Moderate mag. 4.0 earthquake - Departamento de Sarmiento, 34 km southwest of Pocito, San Juan, Argentina, on Tuesday, 19 Jan 2021 12:51 am (GMT -3)

Moderate magnitude 4.0 earthquake at 7 km depth

19 Jan 04:02 UTC: First to report: INPRES after 10 minutes.
19 Jan 05:02: Magnitude recalculated from 4.1 to 4.0. Hypocenter depth recalculated from 10.0 to 7.0 km (from 6.2 to 4.3 mi). Epicenter location corrected by 5.8 km (3.6 mi) towards WSW.
Date & time: 19 Jan 2021 03:51:51 UTC -
Local time at epicenter: Tuesday, 19 Jan 2021 12:51 am (GMT -3)
Magnitude: 4
Depth: 7.0 km
Epicenter latitude / longitude: 31.821°S / 68.91°W (Departamento de Sarmiento, San Juan, Argentina)
Nearest volcano: Tupungatito (198 km / 123 mi)
Nearby towns and cities:
34 km (21 mi) SSW of Villa Basilio Nievas (pop: 4,040) --> See nearby quakes!
34 km (21 mi) WSW of Pocito (pop: 41,000) --> See nearby quakes!
47 km (29 mi) SW of San Juan (pop: 447,000) --> See nearby quakes!
50 km (31 mi) SW of Santa Lucia (pop: 43,600) --> See nearby quakes!
51 km (31 mi) SW of Villa Paula de Sarmiento (pop: 19,100) --> See nearby quakes!
52 km (32 mi) SW of Chimbas (pop: 73,800) --> See nearby quakes!
56 km (35 mi) SW of Albardon (pop: 20,400) --> See nearby quakes!
62 km (39 mi) WSW of Caucete (pop: 33,600) --> See nearby quakes!
119 km (74 mi) N of Mendoza (pop: 876,900) --> See nearby quakes!
244 km (152 mi) NE of Santiago de Chile (Santiago Metropolitan, Chile) (pop: 4,837,300) --> See nearby quakes!
Weather at epicenter at time of quake:
Broken Clouds 21.7°C (71 F), humidity: 24%, wind: 2 m/s (3 kts) from E
Primary data source: INPRES
Estimated released energy: 6.3 x 1010 joules (17.5 megawatt hours, equivalent to 15.1 tons of TNT) 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 4.07 kmSAN JUAN (Argentina)INPRES
M 4.916 kmSAN JUAN, ARGENTINAEMSC
M 4.910 km32 Km WSW of Pocito, ArgentinaUSGS

User reports for this quake (1)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Bahía blanca / not felt / rattling, vibrating / 10-15 s : Me estaba bañando y el agua de la bañadera se empezó a balancear me mareé y pensé que era la vista luego le cuento a mi mujer y me dijo que le pasó exactamente lo mismo
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