Moderate mag. 4.6 earthquake - South Pacific Ocean, 117 km northwest of Valparaiso, Region de Valparaiso, Chile, on Thursday, Sep 16, 2021 4:28 am (GMT -5) -

Moderate mag. 4.6 earthquake - South Pacific Ocean, 117 km northwest of Valparaiso, Region de Valparaiso, Chile, on Thursday, Sep 16, 2021 4:28 am (GMT -5)

Moderate magnitude 4.6 earthquake at 10 km depth

16 Sep 09:41 UTC: First to report: EMSC after 13 minutes.
16 Sep 09:55: Magnitude recalculated from 4.2 to 4.6. Hypocenter depth recalculated from 29.0 to 10.0 km (from 18 to 6.2 mi). Epicenter location corrected by 9.5 km (5.9 mi) towards W.
Update Thu, 16 Sep 2021, 09:45
Moderate 4.2 quake hits near La Ligua, Petorca Province, Valparaiso, Chile
4.2 quake 16 Sep 4:28 am (GMT -5)
4.2 quake 16 Sep 4:28 am (GMT -5)
A shallow magnitude 4.2 earthquake was reported early morning near La Ligua, Petorca Province, Valparaiso, Chile.
According to the European-Mediterranean Seismological Centre (EMSC), the quake hit on Thursday, September 16th, 2021, at 4:28 am local time at a shallow depth of 29 km. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. 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 93 km from the epicenter.

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Earthquake data

Date & time: Sep 16, 2021 09:28:28 UTC -
Local time at epicenter: Thursday, Sep 16, 2021 4:28 am (GMT -5)
Magnitude: 4.6
Depth: 10.0 km
Epicenter latitude / longitude: 32.12°S / 72.24°W (South Pacific Ocean, Chile)
Antipode: 32.12°N / 107.76°E
Nearby towns and cities:
102 km (63 mi) WNW of La Ligua (Petorca) (pop: 24,900) --> See nearby quakes!
117 km (73 mi) NNW of Valparaiso (pop: 282,400) --> See nearby quakes!
120 km (74 mi) NNW of Viña del Mar (pop: 294,600) --> See nearby quakes!
121 km (75 mi) NW of Hacienda La Calera (pop: 49,100) --> See nearby quakes!
126 km (78 mi) NW of Quillota (pop: 67,800) --> See nearby quakes!
127 km (79 mi) NW of Quilpué (pop: 130,300) --> See nearby quakes!
131 km (81 mi) NW of Villa Alemana (pop: 97,300) --> See nearby quakes!
174 km (108 mi) NNW of San Antonio (pop: 85,700) --> See nearby quakes!
210 km (131 mi) NW of Santiago de Chile (pop: 4,837,300) --> See nearby quakes!
227 km (141 mi) NW of Puente Alto (pop: 510,400) --> See nearby quakes!
Weather at epicenter at time of quake:
Clear Sky 12.4°C (54 F), humidity: 90%, wind: 8 m/s (16 kts) from S
Primary data source: EMSC (European-Mediterranean Seismological Centre)
Estimated released energy: 5 x 1011 joules (139 megawatt hours, equivalent to 120 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.
Mag.DepthLocationSource
4.610 kmOFFSHORE COQUIMBO, CHILEEMSC
4.610.3 km101 Km WNW of La Ligua, ChileUSGS

User reports for this quake (2)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Santiago (210.5 km SE of epicenter) [Map] / not felt (reported through our app)
santa rosa / Very weak shaking (MMI II)
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