Weak mag. 3.6 earthquake - South Pacific Ocean, 84 km southwest of San Antonio, Region de Valparaiso, Chile, on Tuesday, April 20, 2021 at 11:28 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, 18 Apr 11:18 pm (GMT -4), which had occurred 1 day 8 hours earlier.
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Weak magnitude 3.6 earthquake at 37 km depth
20 Apr 11:43 UTC: First to report: EMSC after 15 minutes.
20 Apr 11:48: Now using data updates from GUG (U. Chile)
20 Apr 11:48: Now using data updates from GUG (U. Chile)
Earthquake details
| Date & time | Apr 20, 2021 11:28:32 UTC - |
| Local time at epicenter | |
| Status | Confirmed |
| Magnitude | 3.6 |
| Depth | 36.6 km |
| Epicenter latitude / longitude | 34.035°S / 72.352°W  (South Pacific Ocean, Chile) |
| Antipode | 34.035°N / 107.648°E |
| Shaking intensity | Very weak shaking |
| Felt | 0 reports |
| Primary data source | GUG (U. Chile) |
| Nearest volcano | Palomo (199 km / 124 mi) |
| Nearby towns and cities | 84 km (52 mi) SW of San Antonio (pop: 85,700) | Show on map | Quakes nearby 87 km (54 mi) SW of Cartagena (San Antonio) (pop: 16,900) | Show on map | Quakes nearby 112 km (69 mi) WSW of Melipilla (pop: 63,100) | Show on map | Quakes nearby 130 km (81 mi) SSW of Valparaiso (pop: 282,400) | Show on map | Quakes nearby 135 km (84 mi) SSW of Viña del Mar (pop: 294,600) | Show on map | Quakes nearby 149 km (92 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 170 km (106 mi) WSW of Santiago de Chile (pop: 4,837,300) | Show on map | Quakes nearby 171 km (106 mi) WSW of Puente Alto (pop: 510,400) | Show on map | Quakes nearby |
| Estimated seismic energy released | 1.6 x 1010 joules (4.4 megawatt hours, equivalent to 3.79 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 |
| 3.6 | 37 km | 49 Km Al O De Navidad, Chile | GUG (U. Chile) |
| 3.6 | 37 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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