Weak mag. 2.8 earthquake - South Pacific Ocean, 73 km southwest of San Antonio, Region de Valparaiso, Chile, on Wednesday, April 21, 2021 at 10:30 GMT -
This quake was likely an aftershock of the 5.1 quake South Pacific Ocean, 77 km southwest of San Antonio, Region de Valparaiso, Chile, 19 Apr 9:05 am (GMT -4), which had occurred 1 day 21 hours earlier.
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Weak magnitude 2.8 earthquake at 23 km depth
21 Apr 10:43 UTC: First to report: EMSC after 13 minutes.
21 Apr 10:44: Now using data updates from GUG (U. Chile)
21 Apr 10:44: Now using data updates from GUG (U. Chile)
Earthquake details
| Date & time | Apr 21, 2021 10:30:26 UTC - |
| Local time at epicenter | |
| Status | Confirmed |
| Magnitude | 2.8 |
| Depth | 23.0 km |
| Epicenter latitude / longitude | 34.011°S / 72.222°W  (South Pacific Ocean, Chile) |
| Antipode | 34.011°N / 107.778°E |
| Shaking intensity | Very weak shaking |
| Felt | 0 reports |
| Primary data source | GUG (U. Chile) |
| Nearest volcano | Palomo (189 km / 117 mi) |
| Nearby towns and cities | 73 km (46 mi) SW of San Antonio (pop: 85,700) | Show on map | Quakes nearby 76 km (47 mi) SW of Cartagena (San Antonio) (pop: 16,900) | Show on map | Quakes nearby 100 km (62 mi) WSW of Melipilla (pop: 63,100) | Show on map | Quakes nearby 105 km (65 mi) NW of Santa Cruz (Colchagua) (pop: 33,300) | Show on map | Quakes nearby 136 km (85 mi) NW of Teno (Curicó) (pop: 6,860) | Show on map | Quakes nearby 158 km (98 mi) WSW of Santiago de Chile (pop: 4,837,300) | Show on map | Quakes nearby |
| Estimated seismic energy released | 1 x 109 joules (278 kilowatt hours, equivalent to 0.239 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 |
| 2.8 | 23 km | 37 Km Al O De Navidad, Chile | GUG (U. Chile) |
| 2.8 | 23 km | OFFSHORE O'HIGGINS, CHILE | EMSC |
User reports for this quake
At magnitude 2.8, this quake might have been felt very close to the epicenter and under calm conditions.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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