QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

3 km WSW of Maricao, Puerto Rico

· 27 km deep · released about 41 lb of TNT

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10 km30 km60 km120 km N San Germán Municipio 7 kmLas Marías Municipio 7 kmMaricao Municipio 8 kmHormigueros Municipio 12 kmSabana Grande Municipio 12 kmAñasco Municipio 18 kmSan Sebastián Municipio 19 kmYauco Municipio 19 kmLares Municipio 19 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
27 km below the surface
Felt
no reports yet
Nearest
San Germán Municipio, 7 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 197 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 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 18.1700, -67.0130. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Germán Municipio, PR 7 km (5 mi) NNE of here earthquakes near San Germán Municipio
Las Marías Municipio, PR 7 km (5 mi) SSW of here earthquakes near Las Marías Municipio
Maricao Municipio, PR 8 km (5 mi) W of here earthquakes near Maricao Municipio
Hormigueros Municipio, PR 12 km (7 mi) ENE of here earthquakes near Hormigueros Municipio
Sabana Grande Municipio, PR 12 km (7 mi) NW of here earthquakes near Sabana Grande Municipio
Añasco Municipio, PR 18 km (11 mi) SE of here earthquakes near Añasco Municipio

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

Aftershocks so far

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

  1. 1.6 5 km S of Guánica, Puerto Rico
  2. 2.3 3 km SSE of Guánica, Puerto Rico
  3. 2.2 3 km SSE of Guánica, Puerto Rico
  4. 2.8 12 km NE of Isabela, Puerto Rico
  5. 2.3 1 km ENE of Magas Arriba, Puerto Rico
  6. 2.3 1 km ENE of Magas Arriba, Puerto Rico
  7. 2.9 1 km SSW of Indios, Puerto Rico
  8. 1.6 4 km WSW of Adjuntas, Puerto Rico
  9. 1.9 1 km WSW of Indios, Puerto Rico
  10. 1.9 1 km NNW of Guayanilla, Puerto Rico
  11. 2.2 1 km NNE of Sabana Grande, Puerto Rico
  12. 2.5 1 km E of Magas Arriba, Puerto Rico
  13. 1.8 6 km SSW of Indios, Puerto Rico
  14. 2.2 3 km ESE of Maria Antonia, Puerto Rico
  15. 2.3 14 km SSE of Maria Antonia, 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.