QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

1 km NW of Palmarejo, Puerto Rico

· 20 km deep · released about 22 lb of TNT

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10 km30 km60 km120 km N San Germán Municipio 8 kmLajas Municipio 10 kmHormigueros Municipio 10 kmCabo Rojo Municipio 11 kmSabana Grande Municipio 15 kmGuánica Municipio 21 kmMaricao Municipio 21 kmLas Marías Municipio 23 kmYauco 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 1.9 (md)
Depth
20 km below the surface
Felt
no reports yet
Nearest
San Germán Municipio, 8 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3419 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 22 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 5.8 680,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 480,000× the energy of this one
  3. Around the size people start to feel M 3.0 43× the energy of this one
  4. This earthquake M 1.9 about 22 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 18.0508, -67.0895. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Germán Municipio, PR 8 km (5 mi) SW of here earthquakes near San Germán Municipio
Lajas Municipio, PR 10 km (6 mi) NNW of here earthquakes near Lajas Municipio
Hormigueros Municipio, PR 10 km (6 mi) SSE of here earthquakes near Hormigueros Municipio
Cabo Rojo Municipio, PR 11 km (7 mi) ENE of here earthquakes near Cabo Rojo Municipio
Sabana Grande Municipio, PR 15 km (10 mi) WSW of here earthquakes near Sabana Grande Municipio
Guánica Municipio, PR 21 km (13 mi) WNW of here earthquakes near Guánica 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. 2.2 9 km SW of Guánica, Puerto Rico
  2. 2.2 11 km SW of Guánica, Puerto Rico
  3. 2.2 4 km ENE of Mayagüez, Puerto Rico
  4. 1.8 Puerto Rico region
  5. 2.2 13 km W of Rincón, Puerto Rico
  6. 1.5 3 km S of Palmarejo, Puerto Rico
  7. 2.1 Mona Passage
  8. 3.0 31 km W of Puerto Real, Puerto Rico
  9. 2.2 14 km WNW of Puerto Real, Puerto Rico
  10. 2.4 1 km ENE of Mayagüez, Puerto Rico
  11. 2.1 17 km SW of Stella, Puerto Rico
  12. 2.6 7 km WNW of Rincón, Puerto Rico
  13. 1.9 34 km S of La Parguera, Puerto Rico
  14. 1.6 31 km SSW of Guánica, Puerto Rico
  15. 1.5 6 km SSE of Pole Ojea, 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.