QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

14 km N of Isabel Segunda, Puerto Rico

· 20 km deep · released about 180 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Ceiba Municipio 16 kmVieques Municipio 17 kmCulebra Municipio 18 kmFajardo Municipio 18 kmLuquillo Municipio 28 kmNaguabo Municipio 29 kmRío Grande Municipio 37 kmHumacao Municipio 37 kmLas Piedras Municipio 44 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
Magnitude
M 2.5 (md)
Depth
20 km below the surface
Felt
no reports yet
Nearest
Ceiba Municipio, 16 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 69 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 180 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 86,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 61,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.4× the energy of this one
  4. This earthquake M 2.5 about 180 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.

Where

Epicentre 18.2757, -65.4670. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Ceiba Municipio, PR 16 km (10 mi) E of here earthquakes near Ceiba Municipio
Vieques Municipio, PR 17 km (11 mi) NNW of here earthquakes near Vieques Municipio
Culebra Municipio, PR 18 km (11 mi) WSW of here earthquakes near Culebra Municipio
Fajardo Municipio, PR 18 km (11 mi) SE of here earthquakes near Fajardo Municipio
Luquillo Municipio, PR 28 km (17 mi) ESE of here earthquakes near Luquillo Municipio
Naguabo Municipio, PR 29 km (18 mi) ENE of here earthquakes near Naguabo Municipio

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

Aftershocks so far

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

  1. 2.9 8 km WNW of Culebra, Puerto Rico
  2. 3.1 16 km SE of Esperanza, Puerto Rico
  3. 3.2 7 km ENE of Fajardo, Puerto Rico
  4. 3.1 2 km SW of Hato Candal, Puerto Rico
  5. 3.1 14 km SSE of Esperanza, Puerto Rico
  6. 2.9 17 km S of Esperanza, Puerto Rico
  7. 2.9 16 km SSE of Esperanza, Puerto Rico
  8. 2.1 10 km E of El Negro, Puerto Rico
  9. 3.2 11 km SSE of Punta Santiago, Puerto Rico
  10. 2.1 5 km SSE of Bajandas, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.8 on 2021-10-08 — it released about 2,700 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

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