QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

5 km WNW of Maricao, Puerto Rico

· 29 km deep · released about 43 lb of TNT

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10 km30 km60 km120 km N Las Marías Municipio 6 kmMaricao Municipio 10 kmSan Germán Municipio 11 kmHormigueros Municipio 12 kmAñasco Municipio 14 kmSan Sebastián Municipio 15 kmSabana Grande Municipio 16 kmLares Municipio 18 kmMoca 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
29 km below the surface
Felt
no reports yet
Nearest
Las Marías Municipio, 6 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2951 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 18.2048, -67.0273. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Las Marías Municipio, PR 6 km (4 mi) WSW of here earthquakes near Las Marías Municipio
Maricao Municipio, PR 10 km (6 mi) WNW of here earthquakes near Maricao Municipio
San Germán Municipio, PR 11 km (7 mi) N of here earthquakes near San Germán Municipio
Hormigueros Municipio, PR 12 km (8 mi) NE of here earthquakes near Hormigueros Municipio
Añasco Municipio, PR 14 km (9 mi) SE of here earthquakes near Añasco Municipio
San Sebastián Municipio, PR 15 km (10 mi) SSW of here earthquakes near San Sebastián 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. 1.9 6 km NW of Puerto Real, Puerto Rico
  2. 1.7 13 km WNW of Pole Ojea, Puerto Rico
  3. 1.7 8 km WSW of Puerto Real, Puerto Rico
  4. 2.1 9 km NW of Puerto Real, Puerto Rico
  5. 1.9 10 km WNW of Puerto Real, Puerto Rico
  6. 2.1 7 km WSW of Mayagüez, Puerto Rico
  7. 2.7 10 km NNW of Puerto Real, Puerto Rico
  8. 1.9 7 km E of Pole Ojea, Puerto Rico
  9. 1.9 2 km SE of Aguadilla, Puerto Rico
  10. 2.4 9 km NW of Puerto Real, Puerto Rico
  11. 2.2 9 km WNW of Pole Ojea, Puerto Rico
  12. 1.7 5 km SW of Adjuntas, Puerto Rico
  13. 1.9 6 km SE of Maricao, Puerto Rico
  14. 2.1 4 km NNW of Mayagüez, Puerto Rico
  15. 1.9 2 km WSW of Stella, 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.