Earthquake · reviewed by a seismologist
M 2.4md
Earthquake near Isabela, PR
No earthquake was likely felt in Isabela in the 24 hours to 2:15 pm AST (18:15 UTC). The last one was M 3.4, 31 km (19 mi) N, at 9:00 pm AST on 27 October 2026, estimated intensity II (weak) in town. Every earthquake near Isabela
This page: a magnitude 2.4 earthquake was recorded 10 km (6 mi) west-northwest of Isabela, PR, at 6:20 am AST on 6 November 2026 (10:20 UTC), 19 km deep.
USGS: 6 km N of San Antonio, Puerto Rico
39 km (24 mi) N of Mayagüez, PR · 111 km (69 mi) W of San Juan, PR
- When
- 6:20 am AST on 6 November 2026 ()
- Where
- 10 km (6 mi) west-northwest of Isabela, PR · earthquakes near Isabela
- Magnitude
- M 2.4 (md)
- Depth
- 19 km below the surface
- Felt
- no reports yet
- Nearest
- Aguadilla Municipio, 9 km SSW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 5 days ago
Earthquake alerts for Isabela, PR
Get a notification in this browser when USGS records an earthquake near Isabela, 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 minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 10 km (6 mi) from the epicentre. In Isabela, 10 km away, the estimate is intensity II (weak). 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.
Likely felt in: Rafael Hernandez 9 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 120 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 130,000× the energy of this one
- Magna, Utah 2020 M 5.7 89,000× the energy of this one
- Around the size people start to feel M 3.0 7.9× the energy of this one
- This earthquake M 2.4 about 120 lb of TNT
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.
For this area
The largest earthquake within 50 km since 2016 was M 4.8 on 2026-07-24 — about 4,000 times the energy of this one.
Before 2016, the USGS record lists 12 earthquakes of M5 or more within 50 km; the five largest:
- 7.7 45 km N of San Antonio, Puerto Rico · 40 km N of this epicentre
- 7.1 24 km NNW of San Antonio, Puerto Rico · 19 km NNW of this epicentre
- 6.4 32 km NW of Aguadilla, Puerto Rico · 30 km WNW of this epicentre
- 6.3 6 km WNW of Aguadilla, Puerto Rico · 17 km SW of this epicentre
- 6.1 15 km WNW of San Antonio, Puerto Rico · 13 km W of this epicentre
Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.
Where
Epicentre 18.5508, -67.1048. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Aguadilla Municipio, PR | 9 km (6 mi) | SSW | earthquakes near Aguadilla Municipio |
| Isabela Municipio, PR | 12 km (8 mi) | SE | earthquakes near Isabela Municipio |
| Moca Municipio, PR | 19 km (12 mi) | S | earthquakes near Moca Municipio |
| Quebradillas Municipio, PR | 21 km (13 mi) | ESE | earthquakes near Quebradillas Municipio |
| Aguada Municipio, PR | 21 km (13 mi) | SSW | earthquakes near Aguada Municipio |
| Camuy Municipio, PR | 28 km (17 mi) | ESE | earthquakes near Camuy Municipio |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
1 earthquake has been recorded within 50 km since this one.
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.