QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

3 km SW of Maricao, Puerto Rico

· 14 km deep · released about 47 lb of TNT

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10 km30 km60 km120 km N San Germán Municipio 7 kmMaricao Municipio 7 kmLas Marías Municipio 8 kmSabana Grande Municipio 9 kmHormigueros Municipio 13 kmYauco Municipio 17 kmLares Municipio 19 kmSan Sebastián Municipio 20 kmLajas Municipio 20 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
14 km below the surface
Felt
no reports yet
Nearest
San Germán Municipio, 7 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2562 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 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 18.1543, -66.9991. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Germán Municipio, PR 7 km (4 mi) NE of here earthquakes near San Germán Municipio
Maricao Municipio, PR 7 km (4 mi) WSW of here earthquakes near Maricao Municipio
Las Marías Municipio, PR 8 km (5 mi) SSW of here earthquakes near Las Marías Municipio
Sabana Grande Municipio, PR 9 km (6 mi) NW of here earthquakes near Sabana Grande Municipio
Hormigueros Municipio, PR 13 km (8 mi) E of here earthquakes near Hormigueros Municipio
Yauco Municipio, PR 17 km (10 mi) WNW of here earthquakes near Yauco Municipio

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

Aftershocks so far

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

  1. 1.6 3 km WSW of Fuig, Puerto Rico
  2. 2.0 20 km SSE of Indios, Puerto Rico
  3. 1.9 2 km SW of Adjuntas, Puerto Rico
  4. 1.7 13 km WSW of Pole Ojea, Puerto Rico
  5. 2.1 14 km SSE of Guánica, Puerto Rico
  6. 2.0 2 km NNE of Sabana Grande, Puerto Rico
  7. 1.8 4 km WNW of Hormigueros, Puerto Rico
  8. 2.6 4 km NNE of Isabela, Puerto Rico
  9. 1.6 6 km WSW of Guánica, Puerto Rico
  10. 1.5 3 km WNW of Palmarejo, Puerto Rico
  11. 2.3 8 km NW of Caban, Puerto Rico
  12. 2.0 3 km SW of San Sebastián, Puerto Rico
  13. 2.2 7 km S of La Parguera, Puerto Rico
  14. 2.9 10 km NNW of Camuy, Puerto Rico
  15. 2.3 8 km SE of Tallaboa, 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 2019-09-05 — it released about 1,800 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.