QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

5 km S of Indios, Puerto Rico

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

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10 km30 km60 km120 km N Guayanilla Municipio 7 kmGuánica Municipio 11 kmPeñuelas Municipio 13 kmYauco Municipio 16 kmSabana Grande Municipio 20 kmPonce Municipio 23 kmLajas Municipio 23 kmAdjuntas Municipio 27 kmMaricao Municipio 28 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
9.0 km below the surface
Felt
no reports yet
Nearest
Guayanilla Municipio, 7 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1933 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

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 6.7 280,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 12,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 8,800× 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 1.3× 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 17.9478, -66.8208. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guayanilla Municipio, PR 7 km (4 mi) SSW of here earthquakes near Guayanilla Municipio
Guánica Municipio, PR 11 km (7 mi) E of here earthquakes near Guánica Municipio
Peñuelas Municipio, PR 13 km (8 mi) SW of here earthquakes near Peñuelas Municipio
Yauco Municipio, PR 16 km (10 mi) SSE of here earthquakes near Yauco Municipio
Sabana Grande Municipio, PR 20 km (13 mi) SE of here earthquakes near Sabana Grande Municipio
Ponce Municipio, PR 23 km (15 mi) WSW of here earthquakes near Ponce 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 1 km S of Indios, Puerto Rico
  2. 2.5 2 km W of Guayanilla, Puerto Rico
  3. 2.7 7 km WSW of Guánica, Puerto Rico
  4. 2.4 1 km SSW of Guánica, Puerto Rico
  5. 1.8 4 km SSW of Palmarejo, Puerto Rico
  6. 2.4 3 km S of Indios, Puerto Rico
  7. 2.7 4 km S of Indios, Puerto Rico
  8. 2.5 13 km SSE of Guánica, Puerto Rico
  9. 2.3 2 km NNE of Fuig, Puerto Rico
  10. 3.0 3 km SSE of Guánica, Puerto Rico
  11. 2.3 3 km S of Guánica, Puerto Rico
  12. 2.8 2 km ESE of Maria Antonia, Puerto Rico
  13. 2.2 Puerto Rico region
  14. 2.6 0 km SSE of Guayanilla, Puerto Rico
  15. 2.4 3 km W of Guayanilla, 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 99,000 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.