QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

Earthquake near San Juan, PR

No earthquake was likely felt in San Juan in the 24 hours to 1:33 am AST (05:33 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 2.8 earthquake was recorded 48 km (30 mi) east-northeast of San Juan, PR, at 7:35 am AST on 30 October 2025 (11:35 UTC), 17 km deep.

USGS: 32 km NNE of Vieques, Puerto Rico

48 km (30 mi) NE of San Juan, PR · 42 km (26 mi) NE of Carolina, PR

7:35 am AST, Oct 30, 2025 · · 17 km deep · released about 550 lb of TNT

Every earthquake near San Juan Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Loíza Municipio 36 kmRío Grande Municipio 37 kmLuquillo Municipio 37 kmFajardo Municipio 38 kmCarolina Municipio 42 kmCanóvanas Municipio 45 kmSan Juan Municipio 48 kmTrujillo Alto Municipio 50 kmCeiba Municipio 51 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
7:35 am AST on 30 October 2025 ()
Where
48 km (30 mi) east-northeast of San Juan, PR · earthquakes near San Juan
Magnitude
M 2.8 (md)
Depth
17 km below the surface
Felt
no reports yet
Nearest
Loíza Municipio, 36 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 378 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 24 km (15 mi) from the epicentre. In San Juan, 48 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.

How big was it?

This earthquake released about 550 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 28,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 19,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.7× the energy of this one
  4. This earthquake M 2.8 about 550 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 2021-03-09 — about 870 times the energy of this one.

Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:

  1. 5.0 73 km NNE of Vieques, Puerto Rico · 41 km NE 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 18.7020, -65.7278. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Loíza Municipio, PR 36 km (23 mi) SW earthquakes near Loíza Municipio
Río Grande Municipio, PR 37 km (23 mi) SSW earthquakes near Río Grande Municipio
Luquillo Municipio, PR 37 km (23 mi) S earthquakes near Luquillo Municipio
Fajardo Municipio, PR 38 km (24 mi) SSE earthquakes near Fajardo Municipio
Carolina Municipio, PR 42 km (26 mi) SW earthquakes near Carolina Municipio
Canóvanas Municipio, PR 45 km (28 mi) SSW earthquakes near Canóvanas Municipio

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

Aftershocks so far

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

  1. 3.1 55 km NNE of San Juan, Puerto Rico
  2. 3.0 60 km N of Loíza, Puerto Rico
  3. 2.9 23 km NNE of Luquillo, Puerto Rico
  4. 3.3 41 km N of Culebra, Puerto Rico
  5. 3.2 51 km NNE of Vieques, Puerto Rico
  6. 3.1 3 km ESE of San Juan, Puerto Rico
  7. 3.3 20 km NE of Luquillo, Puerto Rico
  8. 2.5 27 km NNE of Vieques, Puerto Rico
  9. 2.8 17 km N of San Juan, Puerto Rico
  10. 3.4 49 km N of Suárez, Puerto Rico
  11. 3.1 59 km N of Loíza, Puerto Rico
  12. 3.8 30 km NNE of Luquillo, Puerto Rico
  13. 2.9 59 km N of Culebra, Puerto Rico
  14. 2.3 5 km W of Campo Rico, Puerto Rico
  15. 2.8 8 km NE of Vieques, 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.