QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

3 km S of Palmarejo, Puerto Rico

· 15 km deep · released about 41 lb of TNT

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10 km30 km60 km120 km N Lajas Municipio 5 kmCabo Rojo Municipio 11 kmSan Germán Municipio 11 kmHormigueros Municipio 14 kmSabana Grande Municipio 16 kmGuánica Municipio 18 kmMaricao Municipio 23 kmYauco Municipio 24 kmLas Marías Municipio 26 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
15 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Lajas Municipio, 5 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 463 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 41 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 5.8 370,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 260,000× the energy of this one
  3. Around the size people start to feel M 3.0 23× the energy of this one
  4. This earthquake M 2.1 about 41 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 18.0125, -67.0753. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lajas Municipio, PR 5 km (3 mi) NW of here earthquakes near Lajas Municipio
Cabo Rojo Municipio, PR 11 km (7 mi) E of here earthquakes near Cabo Rojo Municipio
San Germán Municipio, PR 11 km (7 mi) SSW of here earthquakes near San Germán Municipio
Hormigueros Municipio, PR 14 km (9 mi) SSE of here earthquakes near Hormigueros Municipio
Sabana Grande Municipio, PR 16 km (10 mi) WSW of here earthquakes near Sabana Grande Municipio
Guánica Municipio, PR 18 km (11 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

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

  1. 2.4 3 km SSE of Guánica, Puerto Rico
  2. 2.2 3 km SW of Adjuntas, Puerto Rico
  3. 2.5 3 km SSE of Maria Antonia, Puerto Rico
  4. 2.1 7 km SSE of Maria Antonia, Puerto Rico
  5. 2.3 4 km SSE of Maria Antonia, Puerto Rico
  6. 2.4 7 km SE of Maria Antonia, Puerto Rico
  7. 2.0 1 km NE of Maria Antonia, Puerto Rico
  8. 2.3 2 km WNW of Tallaboa, Puerto Rico
  9. 1.6 2 km NNE of Guayanilla, Puerto Rico
  10. 2.1 2 km SSE of Guánica, Puerto Rico
  11. 2.3 6 km SSE of La Parguera, Puerto Rico
  12. 2.2 7 km ESE of La Parguera, Puerto Rico
  13. 2.0 1 km ENE of Magas Arriba, Puerto Rico
  14. 2.1 5 km SSE of Maria Antonia, Puerto Rico
  15. 2.1 5 km ESE of La Parguera, 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 6.4 on 2020-01-07 — it released about 2,900,000 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.