QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

3 km E of Pole Ojea, Puerto Rico

· 6.0 km deep · released about 1,500 lb of TNT

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10 km30 km60 km120 km N Cabo Rojo Municipio 4 kmLajas Municipio 12 kmHormigueros Municipio 18 kmSan Germán Municipio 19 kmGuánica Municipio 24 kmSabana Grande Municipio 24 kmMaricao Municipio 31 kmLas Marías Municipio 33 kmYauco Municipio 33 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
6.0 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Cabo Rojo Municipio, 4 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1875 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 1,500 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 6.7 230,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 10,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,200× the energy of this one
  4. This earthquake M 3.1 about 1,500 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.6× 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 17.9800, -67.1511. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cabo Rojo Municipio, PR 4 km (2 mi) ESE of here earthquakes near Cabo Rojo Municipio
Lajas Municipio, PR 12 km (7 mi) W of here earthquakes near Lajas Municipio
Hormigueros Municipio, PR 18 km (11 mi) SSW of here earthquakes near Hormigueros Municipio
San Germán Municipio, PR 19 km (12 mi) SW of here earthquakes near San Germán Municipio
Guánica Municipio, PR 24 km (15 mi) W of here earthquakes near Guánica Municipio
Sabana Grande Municipio, PR 24 km (15 mi) WSW 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

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

  1. 3.1 6 km E of La Parguera, Puerto Rico
  2. 3.0 5 km WSW of La Parguera, Puerto Rico
  3. 3.1 5 km SSW of Palmarejo, Puerto Rico
  4. 2.5 1 km NNW of Indios, Puerto Rico
  5. 2.4 3 km SSW of Peñuelas, Puerto Rico
  6. 2.6 2 km SW of Indios, Puerto Rico
  7. 2.9 6 km ENE of La Parguera, Puerto Rico
  8. 1.9 5 km SSE of Guánica, Puerto Rico
  9. 2.4 7 km SSE of Guánica, Puerto Rico
  10. 2.5 4 km ESE of Indios, Puerto Rico
  11. 3.0 1 km SSE of Maria Antonia, Puerto Rico
  12. 2.0 1 km NNW of Guayanilla, Puerto Rico
  13. 2.6 14 km S of Guánica, Puerto Rico
  14. 2.6 3 km ESE of Indios, Puerto Rico
  15. 2.8 3 km S of Magas Arriba, 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 80,000 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.