QuakeIndex

Earthquake · reviewed by a seismologist

M 3.5md

Earthquake near Moca, PR

No earthquake was likely felt in Moca in the 24 hours to 2:54 pm AST (18:54 UTC). The last one was M 3.5, in Moca, at 12:03 am AST on 6 November 2026, estimated intensity II (weak) in town. Every earthquake near Moca

This page: a magnitude 3.5 earthquake was recorded in Moca, PR, at 12:03 am AST on 6 November 2026 (04:03 UTC), 59 km deep.

USGS: 1 km NW of Moca, Puerto Rico

22 km (14 mi) N of Mayagüez, PR · 112 km (69 mi) W of San Juan, PR

12:03 am AST, Nov 6, 2026 · · 59 km deep · released about 2.3 tons of TNT

Every earthquake near Moca Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Moca Municipio 5 kmAguada Municipio 7 kmAguadilla Municipio 9 kmAñasco Municipio 13 kmIsabela Municipio 15 kmRincón Municipio 15 kmSan Sebastián Municipio 18 kmQuebradillas Municipio 22 kmLas Marías Municipio 25 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
12:03 am AST on 6 November 2026 ()
Where
in Moca, PR · earthquakes near Moca
Magnitude
M 3.5 (md)
Depth
59 km below the surface
Felt
no reports yet
Nearest
Moca Municipio, 5 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 6 days 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 14 km (9 mi) from the epicentre. 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: Aguadilla 4 km, intensity II · Aguada 7 km, intensity II · 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 2.3 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.5 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 75,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 3,300× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,400× the energy of this one
  4. This earthquake M 3.5 about 2.3 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 4.7× 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.

For this area

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record lists 10 earthquakes of M5 or more within 50 km; the five largest:

  1. 7.1 24 km NNW of San Antonio, Puerto Rico · 34 km NNW of this epicentre
  2. 6.4 32 km NW of Aguadilla, Puerto Rico · 37 km NW of this epicentre
  3. 6.3 6 km WNW of Aguadilla, Puerto Rico · 11 km WNW of this epicentre
  4. 6.1 15 km WNW of San Antonio, Puerto Rico · 20 km NW of this epicentre
  5. 6.1 18 km NNW of San Antonio, Puerto Rico · 27 km NNW 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 18.4006, -67.1223. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Moca Municipio, PR 5 km (3 mi) ESE earthquakes near Moca Municipio
Aguada Municipio, PR 7 km (5 mi) WSW earthquakes near Aguada Municipio
Aguadilla Municipio, PR 9 km (6 mi) NNW earthquakes near Aguadilla Municipio
Añasco Municipio, PR 13 km (8 mi) S earthquakes near Añasco Municipio
Isabela Municipio, PR 15 km (9 mi) NE earthquakes near Isabela Municipio
Rincón Municipio, PR 15 km (9 mi) WSW earthquakes near Rincón Municipio

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

6 earthquakes have been recorded within 50 km since this one.

  1. 2.1 5 km ESE of Boquerón, Puerto Rico
  2. 2.9 2 km NNW of La Parguera, Puerto Rico
  3. 2.1 1 km W of La Parguera, Puerto Rico
  4. 3.0 1 km WSW of La Parguera, Puerto Rico
  5. 2.7 1 km S of Sabana Grande, Puerto Rico
  6. 2.4 6 km N of San Antonio, 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

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.