QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

7 km SSW of Tallaboa, Puerto Rico

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

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10 km30 km60 km120 km N Guayanilla Municipio 10 kmPeñuelas Municipio 11 kmPonce Municipio 16 kmGuánica Municipio 19 kmYauco Municipio 21 kmSabana Grande Municipio 28 kmJuana Díaz Municipio 28 kmAdjuntas Municipio 28 kmLajas Municipio 32 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
7.0 km below the surface
Felt
1 report · strongest reported intensity I
Nearest
Guayanilla Municipio, 10 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 882 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 1,200 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 17.9310, -66.7432. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guayanilla Municipio, PR 10 km (6 mi) SE of here earthquakes near Guayanilla Municipio
Peñuelas Municipio, PR 11 km (7 mi) S of here earthquakes near Peñuelas Municipio
Ponce Municipio, PR 16 km (10 mi) WSW of here earthquakes near Ponce Municipio
Guánica Municipio, PR 19 km (12 mi) E of here earthquakes near Guánica Municipio
Yauco Municipio, PR 21 km (13 mi) SE of here earthquakes near Yauco Municipio
Sabana Grande Municipio, PR 28 km (17 mi) SE 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

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

  1. 2.2 9 km SSE of Maria Antonia, Puerto Rico
  2. 2.4 5 km SSW of Indios, Puerto Rico
  3. 2.5 9 km SSE of Maria Antonia, Puerto Rico
  4. 2.8 10 km SSE of Indios, Puerto Rico
  5. 2.2 5 km SE of Maria Antonia, Puerto Rico
  6. 2.7 4 km NW of Orocovis, Puerto Rico
  7. 2.6 2 km ENE of Tallaboa, Puerto Rico
  8. 2.3 1 km N of Indios, Puerto Rico
  9. 2.4 8 km SW of Guánica, Puerto Rico
  10. 2.4 1 km S of Lluveras, Puerto Rico
  11. 3.3 3 km S of Guánica, Puerto Rico
  12. 2.9 20 km SSW of Guánica, Puerto Rico
  13. 2.8 6 km SW of Liborio Negron Torres, Puerto Rico
  14. 2.9 5 km SW of Guánica, Puerto Rico
  15. 2.1 1 km S of Liborio Negron Torres, 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.