Weak mag. 3.4 earthquake - South Pacific Ocean, 87 km southwest of San Antonio, Region de Valparaiso, Chile, on Friday, April 23, 2021 at 13:19 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 1 day 13 hours earlier.
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Weak magnitude 3.4 earthquake at 32 km depth
23 Apr 13:38 UTC: First to report: GUG (U. Chile) after 18 minutes.
23 Apr 22:32: Hypocenter depth recalculated from 20.0 to 32.3 km (from 12.4 to 20 mi). Epicenter location corrected by 1.3 km (0.8 mi) towards WNW.
23 Apr 22:32: Hypocenter depth recalculated from 20.0 to 32.3 km (from 12.4 to 20 mi). Epicenter location corrected by 1.3 km (0.8 mi) towards WNW.
Earthquake details
| Date & time | Apr 23, 2021 13:19:50 UTC - |
| Local time at epicenter | |
| Status | Confirmed |
| Magnitude | 3.4 |
| Depth | 32.3 km |
| Epicenter latitude / longitude | 34.044°S / 72.378°W  (South Pacific Ocean, Chile) |
| Antipode | 34.044°N / 107.622°E |
| Shaking intensity | Very weak shaking |
| Felt | 0 reports |
| Primary data source | GUG (U. Chile) |
| Nearest volcano | Palomo (200 km / 124 mi) |
| Nearby towns and cities | 87 km (54 mi) SW of San Antonio (pop: 85,700) | Show on map | Quakes nearby 90 km (56 mi) SW of Cartagena (San Antonio) (pop: 16,900) | Show on map | Quakes nearby 114 km (71 mi) WSW of Melipilla (pop: 63,100) | Show on map | Quakes nearby 132 km (82 mi) SSW of Valparaiso (pop: 282,400) | Show on map | Quakes nearby 137 km (85 mi) SSW of Viña del Mar (pop: 294,600) | Show on map | Quakes nearby 141 km (87 mi) SW of Quilpué (pop: 130,300) | Show on map | Quakes nearby 151 km (94 mi) W of Rancagua (pop: 212,700) | Show on map | Quakes nearby 167 km (104 mi) NNW of Talca (pop: 197,500) | Show on map | Quakes nearby 173 km (107 mi) WSW of Santiago de Chile (pop: 4,837,300) | Show on map | Quakes nearby |
| Estimated seismic energy released | 7.9 x 109 joules (2.21 megawatt hours, equivalent to 1.9 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 |
| 3.4 | 32 km | 50 Km Al NO De Pichilemu | GUG (U. Chile) |
| 3.4 | 20 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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