QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

3 km N of Pole Ojea, Puerto Rico

· 11 km deep · released about 47 lb of TNT

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10 km30 km60 km120 km N Cabo Rojo Municipio 1 kmLajas Municipio 15 kmHormigueros Municipio 16 kmSan Germán Municipio 19 kmSabana Grande Municipio 27 kmGuánica Municipio 28 kmAñasco Municipio 32 kmMaricao Municipio 32 kmLas Marías Municipio 33 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
11 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Cabo Rojo Municipio, 1 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2670 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 47 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 5.8 320,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 230,000× the energy of this one
  3. Around the size people start to feel M 3.0 20× the energy of this one
  4. This earthquake M 2.1 about 47 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 18.0026, -67.1830. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cabo Rojo Municipio, PR 1 km (0 mi) NNW of here earthquakes near Cabo Rojo Municipio
Lajas Municipio, PR 15 km (10 mi) W of here earthquakes near Lajas Municipio
Hormigueros Municipio, PR 16 km (10 mi) SSW of here earthquakes near Hormigueros Municipio
San Germán Municipio, PR 19 km (12 mi) SW of here earthquakes near San Germán Municipio
Sabana Grande Municipio, PR 27 km (16 mi) WSW of here earthquakes near Sabana Grande Municipio
Guánica Municipio, PR 28 km (18 mi) WNW of here earthquakes near Guánica Municipio

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

Aftershocks so far

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

  1. 1.9 1 km W of Puerto Real, Puerto Rico
  2. 2.6 26 km WSW of Stella, Puerto Rico
  3. 2.3 12 km SW of La Playa, Puerto Rico
  4. 1.8 15 km WSW of Puerto Real, Puerto Rico
  5. 2.4 19 km W of Puerto Real, Puerto Rico
  6. 2.8 20 km WNW of Puerto Real, Puerto Rico
  7. 2.0 3 km S of Guánica, Puerto Rico
  8. 1.9 6 km NNW of Santo Domingo, Puerto Rico
  9. 1.7 11 km NE of Sabana Grande, Puerto Rico
  10. 2.0 4 km SSE of Espino, Puerto Rico
  11. 1.5 3 km NNE of Mayagüez, Puerto Rico
  12. 2.3 18 km S of La Parguera, Puerto Rico
  13. 1.9 4 km NNW of Sabana Grande, Puerto Rico
  14. 1.8 9 km WNW of Puerto Real, Puerto Rico
  15. 1.8 18 km SSW of Guánica, 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.

On USGS

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