Light mag. 4.0 earthquake - South Pacific Ocean, 78 km north of Valparaiso, Region de Valparaiso, Chile, on Sunday, Nov 28, 2021 4:37 am (GMT -5) -

Light mag. 4.0 earthquake - South Pacific Ocean, 78 km north of Valparaiso, Region de Valparaiso, Chile, on Sunday, Nov 28, 2021 4:37 am (GMT -5)

Light magnitude 4.0 earthquake at 23 km depth

28 Nov 09:41 UTC: First to report: EMSC after 4 minutes.
28 Nov 09:57: Magnitude recalculated from 4.2 to 4.0. Hypocenter depth recalculated from 30.0 to 24.0 km (from 18.6 to 14.9 mi). Epicenter location corrected by 6.2 km (3.9 mi) towards NNE.
28 Nov 10:09: Hypocenter depth recalculated from 24.0 to 23.0 km (from 14.9 to 14.3 mi). Epicenter location corrected by 11 km (7 mi) towards W.
28 Nov 10:09: Now using data updates from USGS
Update Sun, 28 Nov 2021, 09:48
Moderate tremor of magnitude 4.2 just reported 70 km northwest of Valparaiso, Chile
4.2 quake 28 Nov 4:37 am (GMT -5)
4.2 quake 28 Nov 4:37 am (GMT -5)
A magnitude 4.2 earthquake near Valparaiso, Provincia de Valparaíso, Region de Valparaiso, Chile, was reported only 11 minutes ago by the European-Mediterranean Seismological Centre (EMSC), considered one of the key international agencies that monitor seismic activity worldwide. The earthquake occurred at a moderately shallow depth of 30 km beneath the epicenter early morning on Sunday, November 28th, 2021, at 4:37 am 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.
Towns or cities near the epicenter where the quake might have been felt as very weak shaking include La Ligua (pop. 24,900) located 56 km from the epicenter, Hacienda La Calera (pop. 49,100) 70 km away, Valparaiso (pop. 282,400) 70 km away, Viña del Mar (pop. 294,600) 71 km away, Quillota (pop. 67,800) 74 km away, Quilpué (pop. 130,300) 78 km away, Villa Alemana (pop. 97,300) 80 km away, and Limache (pop. 35,900) 84 km away.

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Earthquake data

Date & time: Nov 28, 2021 09:37:17 UTC -
Local time at epicenter: Sunday, Nov 28, 2021 4:37 am (GMT -5)
Magnitude: 4
Depth: 22.7 km
Epicenter latitude / longitude: 32.3775°S / 71.9198°W (South Pacific Ocean, Chile)
Antipode: 32.378°N / 108.08°E
Nearest volcano: Tupungatito (228 km / 142 mi)
Nearby towns and cities:
65 km (41 mi) W of La Ligua (Petorca) (pop: 24,900) --> See nearby quakes!
78 km (49 mi) NNW of Valparaiso (pop: 282,400) --> See nearby quakes!
80 km (50 mi) NNW of Viña del Mar (pop: 294,600) --> See nearby quakes!
80 km (50 mi) NW of Hacienda La Calera (pop: 49,100) --> See nearby quakes!
84 km (52 mi) NW of Quillota (pop: 67,800) --> See nearby quakes!
87 km (54 mi) NNW of Quilpué (pop: 130,300) --> See nearby quakes!
90 km (56 mi) NW of Villa Alemana (pop: 97,300) --> See nearby quakes!
94 km (58 mi) NW of Limache (Marga Marga) (pop: 35,900) --> See nearby quakes!
169 km (105 mi) NW of Santiago de Chile (pop: 4,837,300) --> See nearby quakes!
186 km (116 mi) NW of Puente Alto (pop: 510,400) --> See nearby quakes!
Weather at epicenter at time of quake:
Clear Sky 14°C (57 F), humidity: 87%, wind: 11 m/s (21 kts) from S
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 6.3 x 1010 joules (17.5 megawatt hours, equivalent to 15.1 tons of TNT) | about seismic energy
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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.
4.023 km65 Km W of La Ligua, ChileUSGS
4.023 kmNear Coast of Central ChileRaspberryShake

User reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
There are no user reports for this quake.
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