QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9Md

2 km NNW of Hormigueros, Puerto Rico

· 23 km deep · released about 21 lb of TNT

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10 km30 km60 km120 km N Hormigueros Municipio 3 kmSan Germán Municipio 11 kmAñasco Municipio 14 kmLas Marías Municipio 18 kmCabo Rojo Municipio 19 kmMaricao Municipio 21 kmSabana Grande Municipio 21 kmLajas Municipio 22 kmRincón Municipio 24 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 1.9 (Md)
Depth
23 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Hormigueros Municipio, 3 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3608 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 21 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 710,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 500,000× the energy of this one
  3. Around the size people start to feel M 3.0 45× the energy of this one
  4. This earthquake M 1.9 about 21 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 18.1574, -67.1315. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hormigueros Municipio, PR 3 km (2 mi) NNW of here earthquakes near Hormigueros Municipio
San Germán Municipio, PR 11 km (7 mi) WNW of here earthquakes near San Germán Municipio
Añasco Municipio, PR 14 km (9 mi) S of here earthquakes near Añasco Municipio
Las Marías Municipio, PR 18 km (11 mi) WSW of here earthquakes near Las Marías Municipio
Cabo Rojo Municipio, PR 19 km (12 mi) NNE of here earthquakes near Cabo Rojo Municipio
Maricao Municipio, PR 21 km (13 mi) W of here earthquakes near Maricao Municipio

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

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

  1. 2.6 5 km WNW of La Parguera, Puerto Rico
  2. 2.6 5 km WSW of La Parguera, Puerto Rico
  3. 2.4 8 km SSE of La Parguera, Puerto Rico
  4. 2.3 20 km S of La Parguera, Puerto Rico
  5. 2.3 13 km SSW of Guánica, Puerto Rico
  6. 2.4 1 km W of San Germán, Puerto Rico
  7. 2.3 13 km WNW of Rincón, Puerto Rico
  8. 1.7 1 km WNW of Monte Grande, Puerto Rico
  9. 1.9 12 km SSE of Lares, Puerto Rico
  10. 2.0 20 km SSW of Guánica, Puerto Rico
  11. 2.5 11 km NW of Puerto Real, Puerto Rico
  12. 1.9 3 km ESE of Las Marías, Puerto Rico
  13. 2.3 10 km NNW of Puerto Real, Puerto Rico
  14. 2.7 6 km NNW of Santo Domingo, Puerto Rico
  15. 2.4 8 km WSW of Mayagüez, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.