M3.6 earthquake — 39 km NNW of San Antonio, Puerto Rico
An magnitude 3.6 earthquake occurred 39 km NNW of San Antonio, Puerto Rico on Jul 28, 2026 at 23:50 UTC. The epicenter was at a depth of 9 km — a shallow earthquake. Shallow quakes concentrate their energy near the surface, so they tend to produce stronger shaking close to the epicenter.
Event data
| Magnitude | M3.6 |
|---|---|
| Depth | 9.0 km |
| Coordinates | 18.808, -67.278 |
| Time | Jul 28, 23:50 UTC |
| Location | 39 km NNW of San Antonio, Puerto Rico |
| USGS event ID | pr2026209003 |
What this magnitude typically means
Minor earthquakes are often felt close to the epicenter but almost never cause damage. Whether you feel one at all depends on how near and how shallow it is. Tremor does not compute a single local shaking figure here, because how strong a quake feels at any address depends on distance, depth and local geology — open the interactive globe to explore the ShakeMap and estimated intensity.
Nearby recent earthquakes
| Magnitude | Distance | Time (UTC) | Location |
|---|---|---|---|
| M2.6 | 13 km | Jul 25, 00:02 UTC | 30 km NW of San Antonio, Puerto Rico |
| M4.8 | 15 km | Jul 24, 02:42 UTC | 54 km NNW of San Antonio, Puerto Rico |
| M3.1 | 22 km | Jul 24, 00:55 UTC | 53 km N of San Antonio, Puerto Rico |
| M3.3 | 43 km | Jul 22, 21:02 UTC | 79 km NW of San Antonio, Puerto Rico |
| M2.8 | 68 km | Jul 25, 11:31 UTC | 25 km WSW of Stella, Puerto Rico |
| M2.9 | 89 km | Jul 26, 13:13 UTC | 3 km WSW of Boquerón, Puerto Rico |
Earthquake activity in this area
Source: USGS earthquake catalog. Automated readings may be revised. Not for emergency use.