QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

8 km ESE of Maricao, Puerto Rico

· 22 km deep · released about 1,200 lb of TNT

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10 km30 km60 km120 km N Maricao Municipio 4 kmYauco Municipio 10 kmSabana Grande Municipio 10 kmLas Marías Municipio 11 kmLares Municipio 13 kmSan Germán Municipio 15 kmAdjuntas Municipio 15 kmSan Sebastián Municipio 20 kmGuayanilla Municipio 21 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 3.1 (md)
Depth
22 km below the surface
Felt
2 reports · strongest reported intensity II
Nearest
Maricao Municipio, 4 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 853 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,200 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 290,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 13,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 9,100× the energy of this one
  4. This earthquake M 3.1 about 1,200 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.2× more

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 18.1638, -66.9037. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Maricao Municipio, PR 4 km (2 mi) ESE of here earthquakes near Maricao Municipio
Yauco Municipio, PR 10 km (6 mi) NNW of here earthquakes near Yauco Municipio
Sabana Grande Municipio, PR 10 km (6 mi) NNE of here earthquakes near Sabana Grande Municipio
Las Marías Municipio, PR 11 km (7 mi) SE of here earthquakes near Las Marías Municipio
Lares Municipio, PR 13 km (8 mi) SSW of here earthquakes near Lares Municipio
San Germán Municipio, PR 15 km (10 mi) ENE of here earthquakes near San Germán Municipio

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

Aftershocks so far

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

  1. 2.3 7 km SSE of Maria Antonia, Puerto Rico
  2. 2.4 3 km WSW of Potala Pastillo, Puerto Rico
  3. 2.1 12 km SSE of Guánica, Puerto Rico
  4. 2.0 1 km W of Ponce, Puerto Rico
  5. 1.6 4 km E of La Parguera, Puerto Rico
  6. 2.4 15 km SSE of Guánica, Puerto Rico
  7. 2.4 2 km NNW of Indios, Puerto Rico
  8. 2.3 6 km SSE of Maria Antonia, Puerto Rico
  9. 3.1 5 km WSW of Guánica, Puerto Rico
  10. 2.1 3 km NW of Fuig, Puerto Rico
  11. 2.5 1 km SW of Indios, Puerto Rico
  12. 2.2 6 km SW of La Parguera, Puerto Rico
  13. 2.0 2 km N of Indios, Puerto Rico
  14. 3.1 8 km SSW of La Playa, Puerto Rico
  15. 2.5 2 km SSW of Peñuelas, 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 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.