QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

1 km W of Puerto Real, Puerto Rico

· 13 km deep · released about 43 lb of TNT

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10 km30 km60 km120 km N Cabo Rojo Municipio 9 kmHormigueros Municipio 11 kmSan Germán Municipio 17 kmLajas Municipio 20 kmAñasco Municipio 25 kmSabana Grande Municipio 26 kmLas Marías Municipio 29 kmMaricao Municipio 30 kmRincón Municipio 30 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
13 km below the surface
Felt
no reports yet
Nearest
Cabo Rojo Municipio, 9 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3008 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 18.0735, -67.1978. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cabo Rojo Municipio, PR 9 km (5 mi) NNW of here earthquakes near Cabo Rojo Municipio
Hormigueros Municipio, PR 11 km (7 mi) SW of here earthquakes near Hormigueros Municipio
San Germán Municipio, PR 17 km (11 mi) WSW of here earthquakes near San Germán Municipio
Lajas Municipio, PR 20 km (12 mi) WNW of here earthquakes near Lajas Municipio
Añasco Municipio, PR 25 km (15 mi) SSW of here earthquakes near Añasco Municipio
Sabana Grande Municipio, PR 26 km (16 mi) W of here earthquakes near Sabana Grande Municipio

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

Aftershocks so far

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

  1. 2.0 12 km SW of Pole Ojea, Puerto Rico
  2. 2.1 0 km WSW of Puerto Real, Puerto Rico
  3. 1.6 9 km S of La Parguera, Puerto Rico
  4. 2.1 3 km WNW of Maricao, Puerto Rico
  5. 1.6 2 km ENE of Lluveras, Puerto Rico
  6. 1.7 4 km SSE of Indios, Puerto Rico
  7. 1.9 14 km SSW of La Parguera, Puerto Rico
  8. 1.5 3 km NW of Sabana Grande, Puerto Rico
  9. 1.8 2 km NNW of Sabana Grande, Puerto Rico
  10. 2.1 43 km WSW of Stella, Puerto Rico
  11. 1.6 8 km ENE of Sabana Grande, Puerto Rico
  12. 1.6 13 km S of La Parguera, Puerto Rico
  13. 1.6 10 km SSE of La Parguera, Puerto Rico
  14. 2.5 19 km W of Rincón, Puerto Rico
  15. 1.6 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.3 on 2017-10-14 — 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.