Earthquake · reviewed by a seismologist
M 2.7md
Earthquake near Isabela, PR
Yes. A magnitude 2.7 earthquake was recorded 6 km (4 mi) NE of Isabela, PR, at 6:41 am AST on 13 October 2026 (10:41 UTC), 17 km deep. No felt reports to USGS yet.
USGS: 6 km NE of Isabela, Puerto Rico
97 km (60 mi) W of San Juan, PR · 27 km (17 mi) WNW of Arecibo, PR
- When
- 6:41 am AST on 13 October 2026 ()
- Where
- 6 km (4 mi) NE of Isabela, PR · earthquakes near Isabela
- Magnitude
- M 2.7 (md)
- Depth
- 17 km below the surface
- Felt
- no reports yet
- Nearest
- Isabela Municipio, 7 km SW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2 hours ago
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.
At this magnitude and depth, people at rest would likely notice it out to about 19 km (12 mi) from the epicentre. In Isabela, 6 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: Isabela 6 km, intensity II · Quebradillas 8 km, intensity II · Rafael Hernandez 13 km, intensity II · Camuy 15 km, intensity II · Hatillo 17 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 360 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 42,000× the energy of this one
- Magna, Utah 2020 M 5.7 30,000× the energy of this one
- Around the size people start to feel M 3.0 2.6× the energy of this one
- This earthquake M 2.7 about 360 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 4.3 on 2017-10-14 — about 230 times the energy of this one.
Before 2016, the USGS record lists 11 earthquakes of M5 or more within 50 km; the five largest:
- 7.7 45 km N of San Antonio, Puerto Rico · 44 km NNW of this epicentre
- 7.1 24 km NNW of San Antonio, Puerto Rico · 29 km NW of this epicentre
- 6.4 32 km NW of Aguadilla, Puerto Rico · 44 km WNW of this epicentre
- 6.3 6 km WNW of Aguadilla, Puerto Rico · 27 km WSW of this epicentre
- 6.1 15 km WNW of San Antonio, Puerto Rico · 27 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 18.5348, -66.9752. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Isabela Municipio, PR | 7 km (4 mi) | SW | earthquakes near Isabela Municipio |
| Quebradillas Municipio, PR | 9 km (6 mi) | SSE | earthquakes near Quebradillas Municipio |
| Camuy Municipio, PR | 15 km (10 mi) | SE | earthquakes near Camuy Municipio |
| Aguadilla Municipio, PR | 19 km (12 mi) | WSW | earthquakes near Aguadilla Municipio |
| Moca Municipio, PR | 21 km (13 mi) | SSW | earthquakes near Moca Municipio |
| Hatillo Municipio, PR | 21 km (13 mi) | ESE | earthquakes near Hatillo Municipio |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
No further earthquakes have 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.