QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1Md

11 km E of Luis M. Cintron, Puerto Rico

· 12 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Ceiba Municipio 11 kmFajardo Municipio 12 kmLuquillo Municipio 21 kmVieques Municipio 22 kmCulebra Municipio 23 kmNaguabo Municipio 24 kmRío Grande Municipio 30 kmHumacao Municipio 33 kmCanóvanas Municipio 38 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 2.1 (Md)
Depth
12 km below the surface
Felt
no reports yet
Nearest
Ceiba Municipio, 11 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3586 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 43 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 18.2996, -65.5282. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Ceiba Municipio, PR 11 km (7 mi) ENE of here earthquakes near Ceiba Municipio
Fajardo Municipio, PR 12 km (7 mi) SSE of here earthquakes near Fajardo Municipio
Luquillo Municipio, PR 21 km (13 mi) ESE of here earthquakes near Luquillo Municipio
Vieques Municipio, PR 22 km (14 mi) NNW of here earthquakes near Vieques Municipio
Culebra Municipio, PR 23 km (15 mi) W of here earthquakes near Culebra Municipio
Naguabo Municipio, PR 24 km (15 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

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

  1. 2.5 28 km SE of El Negro, Puerto Rico
  2. 2.5 8 km SE of Esperanza, Puerto Rico
  3. 1.9 17 km SW of Esperanza, Puerto Rico
  4. 2.1 15 km SW of Esperanza, Puerto Rico
  5. 2.9 25 km ESE of El Negro, Puerto Rico
  6. 2.3 6 km S of Punta Santiago, Puerto Rico
  7. 2.8 30 km SE of El Negro, Puerto Rico
  8. 2.9 27 km SSW of Esperanza, Puerto Rico
  9. 3.0 7 km N of Vieques, Puerto Rico
  10. 2.1 2 km SE of Esperanza, Puerto Rico
  11. 2.8 25 km SW of Esperanza, Puerto Rico
  12. 2.0 24 km SSW of Esperanza, Puerto Rico
  13. 2.0 7 km WSW of Esperanza, Puerto Rico
  14. 2.2 9 km N of Loíza, Puerto Rico
  15. 2.0 2 km E of Culebra, 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 4.3 on 2016-09-02 — it released about 2,000 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.