QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

2 km SSW of Hormigueros, Puerto Rico

· 12 km deep · released about 920 lb of TNT

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10 km30 km60 km120 km N Hormigueros Municipio 3 kmSan Germán Municipio 11 kmCabo Rojo Municipio 14 kmAñasco Municipio 19 kmLajas Municipio 19 kmSabana Grande Municipio 21 kmLas Marías Municipio 21 kmMaricao Municipio 22 kmRincón Municipio 27 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 3.0 (md)
Depth
12 km below the surface
Felt
2 reports · strongest reported intensity II
Nearest
Hormigueros Municipio, 3 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1341 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 920 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 370,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 16,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 12,000× the energy of this one
  4. This earthquake M 3.0 about 920 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 18.1205, -67.1388. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hormigueros Municipio, PR 3 km (2 mi) WSW of here earthquakes near Hormigueros Municipio
San Germán Municipio, PR 11 km (7 mi) W of here earthquakes near San Germán Municipio
Cabo Rojo Municipio, PR 14 km (9 mi) NNE of here earthquakes near Cabo Rojo Municipio
Añasco Municipio, PR 19 km (12 mi) S of here earthquakes near Añasco Municipio
Lajas Municipio, PR 19 km (12 mi) NNW of here earthquakes near Lajas Municipio
Sabana Grande Municipio, PR 21 km (13 mi) W of here earthquakes near Sabana Grande 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. 2.1 2 km W of Fuig, Puerto Rico
  2. 2.7 3 km WSW of Guánica, Puerto Rico
  3. 2.7 Mona Passage
  4. 2.2 5 km SSW of Indios, Puerto Rico
  5. 2.4 4 km SSW of Indios, Puerto Rico
  6. 2.5 7 km SE of Maria Antonia, Puerto Rico
  7. 1.9 Mona Passage
  8. 1.9 6 km WSW of Fuig, Puerto Rico
  9. 2.5 0 km SSW of Yauco, Puerto Rico
  10. 2.3 Puerto Rico region
  11. 1.9 7 km ESE of La Parguera, Puerto Rico
  12. 1.9 2 km N of Guayanilla, Puerto Rico
  13. 1.7 2 km WSW of Indios, Puerto Rico
  14. 2.7 2 km N of Guayanilla, Puerto Rico
  15. 2.5 3 km E of Hormigueros, 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 130,000 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.