QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

21 km SE of Isabel Segunda, Puerto Rico

· 6.0 km deep · released about 82 lb of TNT

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10 km30 km60 km120 km N Vieques Municipio 20 kmCulebra Municipio 33 kmCeiba Municipio 44 kmFajardo Municipio 51 kmNaguabo Municipio 53 kmHumacao Municipio 55 kmLuquillo Municipio 59 kmYabucoa Municipio 62 kmLas Piedras Municipio 65 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 2.3 (md)
Depth
6.0 km below the surface
Felt
no reports yet
Nearest
Vieques Municipio, 20 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2737 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 82 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 180,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 130,000× the energy of this one
  3. Around the size people start to feel M 3.0 12× the energy of this one
  4. This earthquake M 2.3 about 82 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 18.0335, -65.2740. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Vieques Municipio, PR 20 km (12 mi) ESE of here earthquakes near Vieques Municipio
Culebra Municipio, PR 33 km (20 mi) S of here earthquakes near Culebra Municipio
Ceiba Municipio, PR 44 km (27 mi) ESE of here earthquakes near Ceiba Municipio
Fajardo Municipio, PR 51 km (32 mi) SE of here earthquakes near Fajardo Municipio
Naguabo Municipio, PR 53 km (33 mi) ESE of here earthquakes near Naguabo Municipio
Humacao Municipio, PR 55 km (34 mi) ESE of here earthquakes near Humacao Municipio

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

Aftershocks so far

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

  1. 2.5 24 km SE of Emajagua, Puerto Rico
  2. 1.6 25 km ESE of El Negro, Puerto Rico
  3. 1.6 21 km SE of El Negro, Puerto Rico
  4. 1.6 19 km ESE of El Negro, Puerto Rico
  5. 2.7 31 km SSW of Esperanza, Puerto Rico
  6. 2.5 Puerto Rico region
  7. 2.0 22 km ESE of El Negro, Puerto Rico
  8. 1.7 15 km E of Luis M. Cintron, Puerto Rico
  9. 1.7 7 km NE of Luis M. Cintron, Puerto Rico
  10. 2.2 9 km SSE of Daguao, Puerto Rico
  11. 2.1 36 km SSE of Esperanza, Puerto Rico
  12. 2.3 22 km SE of Esperanza, Puerto Rico
  13. 2.0 21 km ESE of El Negro, Puerto Rico
  14. 2.3 13 km S of Esperanza, Puerto Rico
  15. 2.2 36 km S of Charlotte Amalie, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.3 on 2016-09-02 — it released about 1,000 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.