QuakeIndex

Earthquake · reviewed by a seismologist

M 3.2md

Earthquake near Isabel Segunda, PR

No earthquake was likely felt in Isabel Segunda in the 24 hours to 10:42 am AST (14:42 UTC). The last one was M 2.9, 26 km (16 mi) SSE, at 12:08 pm AST on 29 October 2026, estimated intensity II (weak) in town. Every earthquake near Isabel Segunda

This page: a magnitude 3.2 earthquake was recorded 38 km (23 mi) southeast of Isabel Segunda, PR, at 6:29 pm AST on 11 May 2026 (22:29 UTC), 15 km deep.

USGS: 35 km SE of Esperanza, Puerto Rico

6:29 pm AST, May 11, 2026 · · 15 km deep · released about 1.1 tons of TNT

Every earthquake near Isabel Segunda Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Vieques Municipio 35 kmCulebra Municipio 49 kmCeiba Municipio 59 kmNaguabo Municipio 66 kmHumacao Municipio 67 kmFajardo Municipio 68 kmYabucoa Municipio 71 kmMaunabo Municipio 74 kmLuquillo Municipio 75 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
6:29 pm AST on 11 May 2026 ()
Where
38 km (23 mi) southeast of Isabel Segunda, PR · earthquakes near Isabel Segunda
Magnitude
M 3.2 (md)
Depth
15 km below the surface
Felt
no reports yet
Nearest
Vieques Municipio, 35 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 116 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 46 km (29 mi) from the epicentre. In Isabel Segunda, 38 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: Esperanza 36 km, intensity II · Isabel Segunda 38 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 1.1 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 160,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 7,200× the energy of this one
  3. Magna, Utah 2020 M 5.7 5,100× the energy of this one
  4. This earthquake M 3.2 about 1.1 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.2× 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

The largest earthquake within 50 km since 2016 was M 4.8 on 2021-10-08 — about 230 times the energy of this one.

Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.

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 17.8950, -65.2077. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Vieques Municipio, PR 35 km (22 mi) NW earthquakes near Vieques Municipio
Culebra Municipio, PR 49 km (31 mi) NNW earthquakes near Culebra Municipio
Ceiba Municipio, PR 59 km (37 mi) NW earthquakes near Ceiba Municipio
Naguabo Municipio, PR 66 km (41 mi) WNW earthquakes near Naguabo Municipio
Humacao Municipio, PR 67 km (41 mi) WNW earthquakes near Humacao Municipio
Fajardo Municipio, PR 68 km (42 mi) NW earthquakes near Fajardo Municipio

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

Aftershocks so far

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

  1. 2.9 22 km SE of Esperanza, Puerto Rico
  2. 2.6 23 km NNW of Saint Croix, U.S. Virgin Islands
  3. 2.5 10 km ESE of Esperanza, Puerto Rico
  4. 2.4 16 km SE of Esperanza, Puerto Rico
  5. 4.1 21 km SE of Esperanza, Puerto Rico
  6. 3.3 24 km ESE of Isabel Segunda, Puerto Rico
  7. 3.2 40 km SE of Esperanza, Puerto Rico
  8. 3.1 16 km SE of Esperanza, Puerto Rico
  9. 3.0 28 km SSW of Charlotte Amalie, U.S. Virgin Islands
  10. 3.1 14 km SSE of Esperanza, Puerto Rico
  11. 2.9 17 km S of Esperanza, Puerto Rico
  12. 2.9 16 km SSE of Esperanza, Puerto Rico
  13. 2.5 20 km SSW of Cruz Bay, U.S. Virgin Islands
  14. 2.9 24 km SSW of Cruz Bay, U.S. Virgin Islands
  15. 3.0 6 km SE of Isabel Segunda, 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.