QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

6 km SW of Palmarejo, Puerto Rico

· 9.0 km deep · released about 14 lb of TNT

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10 km30 km60 km120 km N Cabo Rojo Municipio 7 kmLajas Municipio 8 kmSan Germán Municipio 15 kmHormigueros Municipio 15 kmSabana Grande Municipio 20 kmGuánica Municipio 21 kmMaricao Municipio 27 kmYauco Municipio 29 kmLas Marías Municipio 30 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 1.8 (md)
Depth
9.0 km below the surface
Felt
no reports yet
Nearest
Cabo Rojo Municipio, 7 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2641 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 14 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 790,000× the energy of this one
  3. Around the size people start to feel M 3.0 70× the energy of this one
  4. This earthquake M 1.8 about 14 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 17.9956, -67.1153. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cabo Rojo Municipio, PR 7 km (4 mi) E of here earthquakes near Cabo Rojo Municipio
Lajas Municipio, PR 8 km (5 mi) WNW of here earthquakes near Lajas Municipio
San Germán Municipio, PR 15 km (9 mi) SSW of here earthquakes near San Germán Municipio
Hormigueros Municipio, PR 15 km (10 mi) S of here earthquakes near Hormigueros Municipio
Sabana Grande Municipio, PR 20 km (13 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

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

  1. 1.8 12 km NW of Puerto Real, Puerto Rico
  2. 1.7 1 km NE of Liborio Negron Torres, Puerto Rico
  3. 2.0 4 km NNE of Sabana Grande, Puerto Rico
  4. 2.3 23 km W of Puerto Real, Puerto Rico
  5. 1.9 4 km SSW of Indios, Puerto Rico
  6. 2.1 6 km E of Espino, Puerto Rico
  7. 1.8 8 km SW of La Playa, Puerto Rico
  8. 2.2 24 km WSW of Pole Ojea, Puerto Rico
  9. 1.5 3 km SE of Boquerón, Puerto Rico
  10. 2.0 3 km W of Palmarejo, Puerto Rico
  11. 1.8 1 km SE of Lajas, Puerto Rico
  12. 2.1 9 km SSE of La Parguera, Puerto Rico
  13. 1.9 10 km S of Pole Ojea, Puerto Rico
  14. 2.1 19 km WNW of Puerto Real, Puerto Rico
  15. 2.1 8 km W 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.