QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

3 km ENE of San Germán, Puerto Rico

· 21 km deep · released about 1,000 lb of TNT

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10 km30 km60 km120 km N San Germán Municipio 3 kmSabana Grande Municipio 7 kmHormigueros Municipio 12 kmMaricao Municipio 12 kmLajas Municipio 13 kmLas Marías Municipio 15 kmYauco Municipio 16 kmGuánica Municipio 19 kmCabo Rojo 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 3.0 (md)
Depth
21 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
San Germán Municipio, 3 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1245 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 1,000 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 6.7 330,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 15,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 10,000× the energy of this one
  4. This earthquake M 3.0 about 1,000 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 18.0948, -67.0132. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Germán Municipio, PR 3 km (2 mi) ESE of here earthquakes near San Germán Municipio
Sabana Grande Municipio, PR 7 km (4 mi) W of here earthquakes near Sabana Grande Municipio
Hormigueros Municipio, PR 12 km (7 mi) ESE of here earthquakes near Hormigueros Municipio
Maricao Municipio, PR 12 km (7 mi) SW of here earthquakes near Maricao Municipio
Lajas Municipio, PR 13 km (8 mi) NNE of here earthquakes near Lajas Municipio
Las Marías Municipio, PR 15 km (9 mi) SSW of here earthquakes near Las Marías 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. 2.4 Puerto Rico region
  2. 2.5 0 km W of Magas Arriba, Puerto Rico
  3. 2.5 5 km SE of Tallaboa, Puerto Rico
  4. 2.8 8 km SE of La Parguera, Puerto Rico
  5. 2.4 1 km WSW of Indios, Puerto Rico
  6. 2.4 3 km SSW of Guánica, Puerto Rico
  7. 2.2 6 km SW of Guánica, Puerto Rico
  8. 1.9 7 km SW of Guánica, Puerto Rico
  9. 2.1 8 km SSE of Guánica, Puerto Rico
  10. 2.5 9 km SSE of Maria Antonia, Puerto Rico
  11. 3.0 2 km NNW of Tallaboa, Puerto Rico
  12. 1.7 1 km N of Sabana Grande, Puerto Rico
  13. 1.7 3 km N of Yauco, Puerto Rico
  14. 2.0 3 km ENE of Tallaboa, Puerto Rico
  15. 2.3 6 km WSW 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 120,000 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.