QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

14 km SE of Isabel Segunda, Puerto Rico

· 20 km deep · released about 800 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Vieques Municipio 12 kmCulebra Municipio 28 kmCeiba Municipio 36 kmFajardo Municipio 44 kmNaguabo Municipio 45 kmHumacao Municipio 48 kmLuquillo Municipio 51 kmYabucoa Municipio 55 kmLas Piedras Municipio 58 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 3.0 (md)
Depth
20 km below the surface
Felt
no reports yet
Nearest
Vieques Municipio, 12 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 109 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 800 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 420,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 19,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 13,000× the energy of this one
  4. This earthquake M 3.0 about 800 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 18.0737, -65.3353. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Vieques Municipio, PR 12 km (7 mi) ESE of here earthquakes near Vieques Municipio
Culebra Municipio, PR 28 km (18 mi) S of here earthquakes near Culebra Municipio
Ceiba Municipio, PR 36 km (22 mi) ESE of here earthquakes near Ceiba Municipio
Fajardo Municipio, PR 44 km (27 mi) SE of here earthquakes near Fajardo Municipio
Naguabo Municipio, PR 45 km (28 mi) ESE of here earthquakes near Naguabo Municipio
Humacao Municipio, PR 48 km (30 mi) E of here earthquakes near Humacao Municipio

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

Aftershocks so far

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

  1. 3.2 40 km SE of Esperanza, Puerto Rico
  2. 2.9 8 km WNW of Culebra, Puerto Rico
  3. 3.1 16 km SE of Esperanza, Puerto Rico
  4. 3.2 7 km ENE of Fajardo, Puerto Rico
  5. 3.0 28 km SSW of Charlotte Amalie, U.S. Virgin Islands
  6. 3.1 14 km SSE of Esperanza, Puerto Rico
  7. 2.9 17 km S of Esperanza, Puerto Rico
  8. 2.9 16 km SSE of Esperanza, Puerto Rico
  9. 2.7 24 km SE of Emajagua, Puerto Rico
  10. 2.1 10 km E of El Negro, Puerto Rico
  11. 3.2 11 km SSE of Punta Santiago, Puerto Rico
  12. 2.1 5 km SSE of Bajandas, Puerto Rico
  13. 2.5 14 km N of Isabel Segunda, Puerto Rico
  14. 3.0 6 km SE of Isabel Segunda, Puerto Rico
  15. 2.6 14 km SE of Esperanza, 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 600 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.