QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

1 km NNE of Guayanilla, Puerto Rico

· 14 km deep · released about 720 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guayanilla Municipio 3 kmPeñuelas Municipio 6 kmYauco Municipio 10 kmGuánica Municipio 17 kmAdjuntas Municipio 17 kmSabana Grande Municipio 18 kmPonce Municipio 19 kmMaricao Municipio 22 kmLajas 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 2.9 (md)
Depth
14 km below the surface
Felt
2 reports · strongest reported intensity III
Nearest
Guayanilla Municipio, 3 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2349 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 720 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 21,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 15,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.3× the energy of this one
  4. This earthquake M 2.9 about 720 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 18.0281, -66.7885. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guayanilla Municipio, PR 3 km (2 mi) NNE of here earthquakes near Guayanilla Municipio
Peñuelas Municipio, PR 6 km (4 mi) W of here earthquakes near Peñuelas Municipio
Yauco Municipio, PR 10 km (6 mi) SE of here earthquakes near Yauco Municipio
Guánica Municipio, PR 17 km (10 mi) ENE of here earthquakes near Guánica Municipio
Adjuntas Municipio, PR 17 km (11 mi) S of here earthquakes near Adjuntas Municipio
Sabana Grande Municipio, PR 18 km (11 mi) ESE 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

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

  1. 2.9 11 km SSE of Guánica, Puerto Rico
  2. 2.4 9 km SW of Tallaboa, Puerto Rico
  3. 3.0 1 km SE of Guánica, Puerto Rico
  4. 2.3 4 km ESE of Maria Antonia, Puerto Rico
  5. 2.7 1 km ESE of Magas Arriba, Puerto Rico
  6. 2.5 7 km S of Guánica, Puerto Rico
  7. 2.5 12 km SSE of Maria Antonia, Puerto Rico
  8. 3.2 3 km SSW of Indios, Puerto Rico
  9. 2.4 8 km S of Guánica, Puerto Rico
  10. 2.7 0 km E of Luis Llorens Torres, Puerto Rico
  11. 2.5 4 km SSE of Guánica, Puerto Rico
  12. 2.4 7 km S of Guánica, Puerto Rico
  13. 2.5 3 km WSW of Indios, Puerto Rico
  14. 2.8 13 km SSE of Guánica, Puerto Rico
  15. 2.9 4 km SSE 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 170,000 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.