Weak mag. 3.5 earthquake - South Pacific Ocean, 89 km southwest of San Antonio, Region de Valparaiso, Chile, on Thursday, April 22, 2021 at 10:50 GMT -
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 11 hours earlier.
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Weak magnitude 3.5 earthquake at 31 km depth
22 Apr 11:09 UTC: First to report: EMSC after 19 minutes.
22 Apr 11:10: Now using data updates from GUG (U. Chile)
22 Apr 11:26: Hypocenter depth recalculated from 14.2 to 30.4 km (from 8.8 to 18.9 mi). Epicenter location corrected by 5 km (3.1 mi) towards WSW.
22 Apr 12:20: Hypocenter depth recalculated from 30.4 to 30.5 km (from 18.9 to 19 mi).
22 Apr 11:10: Now using data updates from GUG (U. Chile)
22 Apr 11:26: Hypocenter depth recalculated from 14.2 to 30.4 km (from 8.8 to 18.9 mi). Epicenter location corrected by 5 km (3.1 mi) towards WSW.
22 Apr 12:20: Hypocenter depth recalculated from 30.4 to 30.5 km (from 18.9 to 19 mi).
Earthquake details
| Date & time | Apr 22, 2021 10:50:20 UTC - |
| Local time at epicenter | |
| Status | Confirmed |
| Magnitude | 3.5 |
| Depth | 30.5 km |
| Epicenter latitude / longitude | 34.061°S / 72.385°W  (South Pacific Ocean, Chile) |
| Antipode | 34.061°N / 107.615°E |
| Shaking intensity | Weak shaking near epicenter |
| Felt | 0 reports |
| Primary data source | GUG (U. Chile) |
| Nearest volcano | Palomo (197 km / 122 mi) |
| Nearby towns and cities | 89 km (55 mi) SW of San Antonio (pop: 85,700) | Show on map | Quakes nearby 91 km (57 mi) SW of Cartagena (San Antonio) (pop: 16,900) | Show on map | Quakes nearby 116 km (72 mi) WSW of Melipilla (pop: 63,100) | Show on map | Quakes nearby 134 km (83 mi) SSW of Valparaiso (pop: 282,400) | Show on map | Quakes nearby 139 km (86 mi) SSW of Viña del Mar (pop: 294,600) | Show on map | Quakes nearby 152 km (94 mi) W of Rancagua (pop: 212,700) | Show on map | Quakes nearby 166 km (103 mi) NNW of Talca (pop: 197,500) | Show on map | Quakes nearby 174 km (108 mi) WSW of Santiago de Chile (pop: 4,837,300) | Show on map | Quakes nearby 174 km (108 mi) WSW of Puente Alto (pop: 510,400) | Show on map | Quakes nearby |
| Estimated seismic energy released | 1.1 x 1010 joules (3.12 megawatt hours, equivalent to 2.68 tons of TNT) | about seismic energy |
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. | Depth | Location | Source |
| 3.5 | 31 km | 50 Km Al NO De Pichilemu | GUG (U. Chile) |
| 3.5 | 30 km | OFFSHORE O'HIGGINS, CHILE | EMSC |
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Earlier earthquakes in the same area
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