QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

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 2.8 earthquake was recorded 43 km (27 mi) southeast of Isabel Segunda, PR, at 10:34 pm AST on 3 March 2026 (02:34 UTC), 8.1 km deep.

USGS: 41 km SE of Esperanza, Puerto Rico

10:34 pm AST, Mar 3, 2026 · · 8.1 km deep · released about 480 lb of TNT

Every earthquake near Isabel Segunda Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Vieques Municipio 41 kmCulebra Municipio 53 kmCeiba Municipio 65 kmNaguabo Municipio 72 kmHumacao Municipio 73 kmFajardo Municipio 73 kmYabucoa Municipio 77 kmMaunabo Municipio 79 kmLuquillo Municipio 81 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
10:34 pm AST on 3 March 2026 ()
Where
43 km (27 mi) southeast of Isabel Segunda, PR · earthquakes near Isabel Segunda
Magnitude
M 2.8 (md)
Depth
8.1 km below the surface
Felt
no reports yet
Nearest
Vieques Municipio, 41 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 252 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 26 km (16 mi) from the epicentre. In Isabel Segunda, 43 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 480 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 32,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 22,000× the energy of this one
  3. Around the size people start to feel M 3.0 2× the energy of this one
  4. This earthquake M 2.8 about 480 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 2021-10-08 — about 1,000 times the energy of this one.

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

  1. 5.0 29 km S of Cruz Bay, U.S. Virgin Islands · 48 km ENE 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 17.8685, -65.1578. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Vieques Municipio, PR 41 km (25 mi) NW earthquakes near Vieques Municipio
Culebra Municipio, PR 53 km (33 mi) NNW earthquakes near Culebra Municipio
Ceiba Municipio, PR 65 km (40 mi) NW earthquakes near Ceiba Municipio
Naguabo Municipio, PR 72 km (45 mi) WNW earthquakes near Naguabo Municipio
Humacao Municipio, PR 73 km (45 mi) WNW earthquakes near Humacao Municipio
Fajardo Municipio, PR 73 km (46 mi) NW earthquakes near Fajardo Municipio

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

Aftershocks so far

35 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. 3.1 20 km S of Cruz Bay, U.S. Virgin Islands
  15. 2.9 24 km SSW of Cruz Bay, U.S. Virgin Islands

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.