QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

Earthquake near Mora, PR

No earthquake was likely felt in Mora in the 24 hours to 4:26 pm AST (20:26 UTC). The last one was M 3.5, 12 km (7 mi) SW, at 12:03 am AST on 6 November 2026, estimated intensity II (weak) in town. Every earthquake near Mora

This page: a magnitude 2.9 earthquake was recorded 2 km (1 mi) west-northwest of Mora, PR, at 4:16 pm AST on 27 March 2026 (20:16 UTC), 17 km deep.

USGS: 2 km WNW of Mora, Puerto Rico

32 km (20 mi) NNE of Mayagüez, PR · 104 km (65 mi) W of San Juan, PR

4:16 pm AST, Mar 27, 2026 · · 17 km deep · released about 780 lb of TNT

Every earthquake near Mora Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Isabela Municipio 4 kmAguadilla Municipio 10 kmMoca Municipio 11 kmQuebradillas Municipio 13 kmAguada Municipio 18 kmSan Sebastián Municipio 18 kmCamuy Municipio 20 kmAñasco Municipio 22 kmRincón Municipio 26 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
4:16 pm AST on 27 March 2026 ()
Where
2 km (1 mi) west-northwest of Mora, PR · earthquakes near Mora
Magnitude
M 2.9 (md)
Depth
17 km below the surface
Felt
no reports yet
Nearest
Isabela Municipio, 4 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 229 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 29 km (18 mi) from the epicentre. In Mora, 2 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 3 km, intensity II · Isabela 4 km, intensity II · Quebradillas 12 km, intensity II · Aguadilla 12 km, intensity II · San Sebastián 16 km, intensity II · Aguada 18 km, intensity II · Hatillo 24 km, intensity II · Rincón 26 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 780 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 19,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 14,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.2× the energy of this one
  4. This earthquake M 2.9 about 780 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 2019-09-05 — about 110 times the energy of this one.

Before 2016, the USGS record lists 12 earthquakes of M5 or more within 50 km; the five largest:

  1. 7.7 45 km N of San Antonio, Puerto Rico · 49 km N of this epicentre
  2. 7.1 24 km NNW of San Antonio, Puerto Rico · 29 km NNW of this epicentre
  3. 6.4 32 km NW of Aguadilla, Puerto Rico · 39 km WNW of this epicentre
  4. 6.3 6 km WNW of Aguadilla, Puerto Rico · 18 km W of this epicentre
  5. 6.1 15 km WNW of San Antonio, Puerto Rico · 21 km WNW 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 18.4717, -67.0507. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Isabela Municipio, PR 4 km (3 mi) ENE earthquakes near Isabela Municipio
Aguadilla Municipio, PR 10 km (6 mi) W earthquakes near Aguadilla Municipio
Moca Municipio, PR 11 km (7 mi) SSW earthquakes near Moca Municipio
Quebradillas Municipio, PR 13 km (8 mi) E earthquakes near Quebradillas Municipio
Aguada Municipio, PR 18 km (11 mi) SW earthquakes near Aguada Municipio
San Sebastián Municipio, PR 18 km (11 mi) SSE earthquakes near San Sebastián Municipio

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

Aftershocks so far

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

  1. 2.5 16 km N of Arecibo, Puerto Rico
  2. 2.8 45 km NNW of San Antonio, Puerto Rico
  3. 1.9 10 km WNW of Adjuntas, Puerto Rico
  4. 2.6 23 km NNE of Isabela, Puerto Rico
  5. 2.0 1 km N of Lluveras, Puerto Rico
  6. 2.2 6 km NNE of Sabana Eneas, Puerto Rico
  7. 2.1 5 km NNE of Adjuntas, Puerto Rico
  8. 1.6 8 km NW of Adjuntas, Puerto Rico
  9. 2.7 5 km SE of Lares, Puerto Rico
  10. 3.3 8 km NE of Isabela, Puerto Rico
  11. 3.0 43 km NNW of San Antonio, Puerto Rico
  12. 3.5 5 km WNW of Mayagüez, Puerto Rico
  13. 2.4 4 km SSE of Utuado, Puerto Rico
  14. 2.1 4 km SSE of Utuado, Puerto Rico
  15. 2.4 5 km N of Adjuntas, 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.