Light mag. 4.2 earthquake - Departamento de Calingasta, San Juan, 96 km northeast of San Felipe, Valparaiso, Chile, on Monday, 18 Jan 2021 7:57 pm (GMT -3) -

Light mag. 4.2 earthquake - Departamento de Calingasta, San Juan, 96 km northeast of San Felipe, Valparaiso, Chile, on Monday, 18 Jan 2021 7:57 pm (GMT -3)

Light magnitude 4.2 earthquake at 125 km depth

18 Jan 23:06 UTC: First to report: INPRES after 9 minutes.
18 Jan 23:16: Now using data updates from GUG (U. Chile)
18 Jan 23:32: Hypocenter depth recalculated from 125.4 to 125.1 km (from 78 to 78 mi).
Update Mon, 18 Jan 2021, 23:12
Magnitude 4.3 earthquake strikes near San Felipe, Provincia de San Felipe de Aconcagua, Region de Valparaiso, Chile
4.3 quake 18 Jan 7:57 pm (GMT -3)
4.3 quake 18 Jan 7:57 pm (GMT -3)
A magnitude 4.3 earthquake near San Felipe, Provincia de San Felipe de Aconcagua, Region de Valparaiso, Chile, was reported only 15 minutes ago by INPRES, considered the main national agency that monitors seismic activity in this part of the world. The earthquake occurred at an intermediate depth of 126 km beneath the epicenter early evening on Monday 18 January 2021 at 7:57 pm local time. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
A second report was later issued by the European-Mediterranean Seismological Centre (EMSC), which listed it as a magnitude 4.3 earthquake as well.
Towns or cities near the epicenter where the quake might have been felt as very weak shaking include Salamanca (pop. 13,300) located 83 km from the epicenter. In San Felipe (pop. 59,300, 105 km away), Illapel (pop. 22,800, 107 km away), and Los Andes (pop. 56,900, 107 km away), the quake was probably not felt.
VolcanoDiscovery will automatically update magnitude and depth if these change and follow up if other significant news about the quake become available. If you’re in the area, please send us your experience through our reporting mechanism, either online or via our mobile app. This will help us provide more first-hand updates to anyone around the globe who wants to know more about this quake.
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Earthquake data:

Date & time: 18 Jan 2021 22:57:05 UTC -
Local time at epicenter: Monday, 18 Jan 2021 7:57 pm (GMT -3)
Magnitude: 4.2
Depth: 125.1 km
Epicenter latitude / longitude: 31.973°S / 70.285°W (Departamento de Calingasta, San Juan, Chile)
Nearest volcano: Tupungatito (165 km / 103 mi)
Nearby towns and cities:
68 km (42 mi) ESE of Salamanca (Choapa, Coquimbo Region) (pop: 13,300) --> See nearby quakes!
92 km (57 mi) ESE of Illapel (Choapa, Coquimbo Region) (pop: 22,800) --> See nearby quakes!
96 km (60 mi) NNE of San Felipe (Valparaíso) (pop: 59,300) --> See nearby quakes!
100 km (62 mi) NNE of Los Andes (Valparaíso) (pop: 56,900) --> See nearby quakes!
136 km (84 mi) NE of Quillota (Valparaíso) (pop: 67,800) --> See nearby quakes!
157 km (97 mi) NE of Villa Alemana (Valparaíso) (pop: 97,300) --> See nearby quakes!
161 km (100 mi) NE of Quilpué (Valparaíso) (pop: 130,300) --> See nearby quakes!
169 km (105 mi) N of Santiago de Chile (Santiago Metropolitan) (pop: 4,837,300) --> See nearby quakes!
172 km (107 mi) WSW of San Juan (Argentina) (pop: 447,000) --> See nearby quakes!
184 km (115 mi) N of Puente Alto (Santiago Metropolitan) (pop: 510,400) --> See nearby quakes!
Weather at epicenter at time of quake:
Broken Clouds 7.5°C (46 F), humidity: 55%, wind: 2 m/s (4 kts) from W
Primary data source: GUG (U. Chile)
Estimated released energy: 1.3 x 1011 joules (35 megawatt hours, equivalent to 30.1 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.
M 4.2125 km33 Km Al SE De Mina Los Pelambres, ChileGUG (U. Chile)
M 4.2116 kmSAN JUAN (Argentina)INPRES
M 4.4118 km81 Km ESE of Salamanca, Chile, ArgentinaUSGS

User reports for this quake (6)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Leave a comment if you find a particular report interesting or want to add to it.
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161.7 km SW of epicenter [Map] / Moderate shaking (MMI V) / horizontal (sideways) swinging (reported through our app)
161.7 km S of epicenter [Map] / not felt (reported through our app)
Santiago / Weak shaking (MMI III)
Calingasta and San Juan are in Argentina, not Chil / Moderate shaking (MMI V) / 5-10 s
La Calera Córdoba Argentina / Very weak shaking (MMI II) : Leve movimiento del suelo estando en reposo y la puerta se sacudía
Hijuelas / Weak shaking (MMI III) / horizontal (sideways) swinging / 5-10 s
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