QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

7 km S of Lares, Puerto Rico

· 19 km deep · released about 38 lb of TNT

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10 km30 km60 km120 km N Lares Municipio 6 kmMaricao Municipio 7 kmLas Marías Municipio 9 kmSan Sebastián Municipio 14 kmAdjuntas Municipio 15 kmYauco Municipio 16 kmSabana Grande Municipio 17 kmSan Germán Municipio 20 kmUtuado 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
19 km below the surface
Felt
no reports yet
Nearest
Lares Municipio, 6 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1394 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 38 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 5.8 390,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 280,000× the energy of this one
  3. Around the size people start to feel M 3.0 25× the energy of this one
  4. This earthquake M 2.1 about 38 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 18.2263, -66.8910. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lares Municipio, PR 6 km (4 mi) SSW of here earthquakes near Lares Municipio
Maricao Municipio, PR 7 km (5 mi) NE of here earthquakes near Maricao Municipio
Las Marías Municipio, PR 9 km (6 mi) E of here earthquakes near Las Marías Municipio
San Sebastián Municipio, PR 14 km (9 mi) SE of here earthquakes near San Sebastián Municipio
Adjuntas Municipio, PR 15 km (9 mi) WNW of here earthquakes near Adjuntas Municipio
Yauco Municipio, PR 16 km (10 mi) NNW of here earthquakes near Yauco Municipio

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

Aftershocks so far

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

  1. 2.4 7 km ESE of La Parguera, Puerto Rico
  2. 1.8 2 km WSW of Indios, Puerto Rico
  3. 2.0 3 km SW of Indios, Puerto Rico
  4. 2.3 5 km WSW of Guánica, Puerto Rico
  5. 2.2 6 km SW of Guánica, Puerto Rico
  6. 2.2 0 km ESE of Magas Arriba, Puerto Rico
  7. 2.4 Puerto Rico region
  8. 2.5 5 km WSW of Guánica, Puerto Rico
  9. 2.4 6 km SW of Guánica, Puerto Rico
  10. 2.1 8 km SSE of Guánica, Puerto Rico
  11. 2.4 2 km ENE of Magas Arriba, Puerto Rico
  12. 2.3 6 km W of Fuig, Puerto Rico
  13. 3.3 5 km WSW of Guánica, Puerto Rico
  14. 2.4 5 km WSW of Guánica, Puerto Rico
  15. 3.4 6 km SW 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 6.4 on 2020-01-07 — it released about 3,100,000 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.