Light mag. 3.9 earthquake - South Pacific Ocean, 90 km southwest of San Antonio, Region de Valparaiso, Chile, on 23 Apr 12:13 am (GMT -4) -

This quake was likely an aftershock of the 5.3 quake South Pacific Ocean, 88 km southwest of San Antonio, Region de Valparaiso, Chile, 21 Apr 8:17 pm (GMT -4), which had occurred 1 day 4 hours earlier.
Light mag. 3.9 earthquake - South Pacific Ocean, 90 km southwest of San Antonio, Region de Valparaiso, Chile, on 23 Apr 12:13 am (GMT -4) Light mag. 3.9 earthquake - South Pacific Ocean, 90 km southwest of San Antonio, Region de Valparaiso, Chile, on 23 Apr 12:13 am (GMT -4)

Light magnitude 3.9 earthquake at 20 km depth

23 Apr 04:28 UTC: First to report: EMSC after 15 minutes.

Earthquake details

Date & timeApr 23, 2021 04:13:14 UTC -
Local time at epicenter23 Apr 12:13 am (GMT -4)
Depth20.0 km
Epicenter latitude / longitude34.01°S / 72.44°W (South Pacific Ocean, Chile)
Antipode34.01°N / 107.56°E
Shaking intensityWeak shaking near epicenter
Felt0 reports
Primary data sourceEMSC (European-Mediterranean Seismological Centre)
Nearest volcanoPalomo (208 km / 129 mi)
Nearby towns and cities90 km (56 mi) WSW of San Antonio (pop: 85,700) | Show on map | Quakes nearby
92 km (57 mi) SW of Cartagena (San Antonio) (pop: 16,900) | Show on map | Quakes nearby
119 km (74 mi) WSW of Melipilla (pop: 63,100) | Show on map | Quakes nearby
132 km (82 mi) SW of Valparaiso (pop: 282,400) | Show on map | Quakes nearby
137 km (85 mi) SW of Viña del Mar (pop: 294,600) | Show on map | Quakes nearby
157 km (98 mi) W of Rancagua (pop: 212,700) | Show on map | Quakes nearby
173 km (108 mi) NNW of Talca (pop: 197,500) | Show on map | Quakes nearby
177 km (110 mi) WSW of Santiago de Chile (pop: 4,837,300) | Show on map | Quakes nearby
178 km (111 mi) WSW of Puente Alto (pop: 510,400) | Show on map | Quakes nearby
Weather at epicenter at time of quakeScattered Clouds 14.4°C (58 F), humidity: 74%, wind: 7 m/s (13 kts) from SSW
Estimated seismic energy released4.5 x 1010 joules (12.4 megawatt hours, equivalent to 10.7 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.
3.920 km56 Km Al O De Navidad, ChileGUG (U. Chile)
4.410 kmNear the Coast of Libertador O'Higgins, ChileUSGS

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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