QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

3 km SSW of Monte Grande, Puerto Rico

· 20 km deep · released about 590 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Hormigueros Municipio 9 kmCabo Rojo Municipio 9 kmSan Germán Municipio 10 kmLajas Municipio 12 kmSabana Grande Municipio 18 kmMaricao Municipio 23 kmLas Marías Municipio 24 kmGuánica Municipio 24 kmAñasco Municipio 25 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
20 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Hormigueros Municipio, 9 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1372 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 590 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 26,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 18,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.6× the energy of this one
  4. This earthquake M 2.9 about 590 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 18.0582, -67.1192. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hormigueros Municipio, PR 9 km (5 mi) S of here earthquakes near Hormigueros Municipio
Cabo Rojo Municipio, PR 9 km (6 mi) NE of here earthquakes near Cabo Rojo Municipio
San Germán Municipio, PR 10 km (6 mi) WSW of here earthquakes near San Germán Municipio
Lajas Municipio, PR 12 km (8 mi) NW of here earthquakes near Lajas Municipio
Sabana Grande Municipio, PR 18 km (11 mi) W of here earthquakes near Sabana Grande Municipio
Maricao Municipio, PR 23 km (14 mi) WSW of here earthquakes near Maricao 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. 2.1 3 km WSW of Fuig, Puerto Rico
  2. 2.8 3 km WSW of Fuig, Puerto Rico
  3. 1.9 Puerto Rico region
  4. 2.0 2 km WNW of Indios, Puerto Rico
  5. 1.8 4 km WSW of Fuig, Puerto Rico
  6. 2.1 6 km WSW of Fuig, Puerto Rico
  7. 2.0 1 km W of Indios, Puerto Rico
  8. 2.1 Puerto Rico region
  9. 2.1 4 km S of Indios, Puerto Rico
  10. 2.5 Puerto Rico region
  11. 2.0 6 km S of Guánica, Puerto Rico
  12. 2.9 1 km ENE of Mayag?ez, Puerto Rico
  13. 2.2 6 km WSW of Fuig, Puerto Rico
  14. 2.3 3 km S of Guánica, Puerto Rico
  15. 2.2 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 200,000 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.