QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

8 km WSW of Pole Ojea, Puerto Rico

· 12 km deep · released about 16 lb of TNT

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10 km30 km60 km120 km N Cabo Rojo Municipio 10 kmLajas Municipio 24 kmHormigueros Municipio 25 kmSan Germán Municipio 29 kmGuánica Municipio 37 kmSabana Grande Municipio 37 kmAñasco Municipio 39 kmRincón Municipio 42 kmMaricao Municipio 42 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
12 km below the surface
Felt
no reports yet
Nearest
Cabo Rojo Municipio, 10 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2934 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 16 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 5.8 930,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 660,000× the energy of this one
  3. Around the size people start to feel M 3.0 59× the energy of this one
  4. This earthquake M 1.8 about 16 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 17.9590, -67.2678. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cabo Rojo Municipio, PR 10 km (6 mi) WSW of here earthquakes near Cabo Rojo Municipio
Lajas Municipio, PR 24 km (15 mi) W of here earthquakes near Lajas Municipio
Hormigueros Municipio, PR 25 km (16 mi) SW of here earthquakes near Hormigueros Municipio
San Germán Municipio, PR 29 km (18 mi) SW of here earthquakes near San Germán Municipio
Guánica Municipio, PR 37 km (23 mi) W of here earthquakes near Guánica Municipio
Sabana Grande Municipio, PR 37 km (23 mi) WSW 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

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

  1. 2.8 3 km N of Rincón, Puerto Rico
  2. 1.8 1 km NNW of Maria Antonia, Puerto Rico
  3. 2.2 6 km WNW of Las Marías, Puerto Rico
  4. 2.3 4 km E of Boquerón, Puerto Rico
  5. 1.9 8 km S of La Parguera, Puerto Rico
  6. 1.7 7 km S of La Parguera, Puerto Rico
  7. 2.6 46 km W of Pole Ojea, Puerto Rico
  8. 1.7 Puerto Rico region
  9. 1.5 7 km SSE of La Parguera, Puerto Rico
  10. 2.2 6 km NW of Sabana Grande, Puerto Rico
  11. 2.0 1 km SW of Maricao, Puerto Rico
  12. 2.0 1 km NW of Palomas, Puerto Rico
  13. 1.9 3 km SE of Maricao, Puerto Rico
  14. 2.0 3 km ENE of Mayagüez, Puerto Rico
  15. 2.1 9 km S 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.

On USGS

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