Earthquake · reviewed by a seismologist
M 3.1md
Earthquake near San Juan, PR
No earthquake was likely felt in San Juan in the 24 hours to 6:53 pm AST (22:53 UTC). The last one was M 4.1, 99 km (62 mi) SE, at 5:44 am AST on 28 October 2026, estimated intensity II (weak) in town; 5 felt reports to USGS. Every earthquake near San Juan
This page: a magnitude 3.1 earthquake was recorded 33 km (21 mi) west-southwest of San Juan, PR, at 8:05 pm AST on 29 March 2022 (00:05 UTC), 130 km deep.
USGS: Puerto Rico region
34 km (21 mi) WSW of San Juan, PR · 24 km (15 mi) WSW of Bayamón, PR
- When
- 8:05 pm AST on 29 March 2022 ()
- Where
- 33 km (21 mi) west-southwest of San Juan, PR · earthquakes near San Juan
- Magnitude
- M 3.1 (md)
- Depth
- 130 km below the surface
- Felt
- no reports yet
- Nearest
- Morovis Municipio, 5 km W
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1687 days ago
Earthquake alerts for San Juan, PR
Get a notification in this browser when USGS records an earthquake near San Juan, PR. No account or email needed.
Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.
At this magnitude and depth it was probably too small to be felt, even directly above it. In San Juan, 33 km away, the estimate is intensity I (not felt). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
Earthquakes near other towns within 30 km: Morovis, Franquez, Corozal, Miranda, Barahona, Ciales.
How big was it?
This earthquake released about 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 260,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 12,000× the energy of this one
- Magna, Utah 2020 M 5.7 8,200× the energy of this one
- This earthquake M 3.1 about 1,300 lb of TNT
- Around the size people start to feel M 3.0 this one released 1.4× more
Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.
Where
Epicentre 18.3142, -66.3755. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Morovis Municipio, PR | 5 km (3 mi) | W | earthquakes near Morovis Municipio |
| Corozal Municipio, PR | 5 km (3 mi) | ESE | earthquakes near Corozal Municipio |
| Orocovis Municipio, PR | 12 km (8 mi) | SSW | earthquakes near Orocovis Municipio |
| Naranjito Municipio, PR | 13 km (8 mi) | ESE | earthquakes near Naranjito Municipio |
| Vega Alta Municipio, PR | 14 km (9 mi) | NNE | earthquakes near Vega Alta Municipio |
| Barranquitas Municipio, PR | 14 km (9 mi) | SSE | earthquakes near Barranquitas Municipio |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
3 earthquakes have been recorded within 50 km since this one.
- 3.0 2 km N of Yaurel, Puerto Rico
- 2.8 0 km SW of Pastos, Puerto Rico
- 2.5 2 km NNW of Tallaboa, Puerto Rico
Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.
On USGS
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.