QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

20 km SSW of Pole Ojea, Puerto Rico

· 10 km deep · released about 15 lb of TNT

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10 km30 km60 km120 km N Cabo Rojo Municipio 23 kmLajas Municipio 30 kmGuánica Municipio 38 kmHormigueros Municipio 40 kmSan Germán Municipio 41 kmSabana Grande Municipio 45 kmYauco Municipio 52 kmGuayanilla Municipio 53 kmMaricao Municipio 53 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
10 km below the surface
Felt
no reports yet
Nearest
Cabo Rojo Municipio, 23 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3191 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 15 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 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 730,000× the energy of this one
  3. Around the size people start to feel M 3.0 65× the energy of this one
  4. This earthquake M 1.8 about 15 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 17.7981, -67.2481. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cabo Rojo Municipio, PR 23 km (14 mi) SSW of here earthquakes near Cabo Rojo Municipio
Lajas Municipio, PR 30 km (19 mi) SW of here earthquakes near Lajas Municipio
Guánica Municipio, PR 38 km (24 mi) WSW of here earthquakes near Guánica Municipio
Hormigueros Municipio, PR 40 km (25 mi) SSW of here earthquakes near Hormigueros Municipio
San Germán Municipio, PR 41 km (25 mi) SSW of here earthquakes near San Germán Municipio
Sabana Grande Municipio, PR 45 km (28 mi) SW 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

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

  1. 1.9 17 km SSE of Guánica, Puerto Rico
  2. 2.1 1 km W of Sabana Grande, Puerto Rico
  3. 2.4 8 km W of Mayagüez, Puerto Rico
  4. 1.7 7 km SSW of Indios, Puerto Rico
  5. 1.9 8 km SE of Maria Antonia, Puerto Rico
  6. 2.0 14 km SSE of Maria Antonia, Puerto Rico
  7. 2.2 7 km S of Indios, Puerto Rico
  8. 2.2 26 km W of Pole Ojea, Puerto Rico
  9. 1.8 16 km NNE of La Parguera, Puerto Rico
  10. 2.1 5 km W of Boquerón, Puerto Rico
  11. 2.2 6 km WSW of Puerto Real, Puerto Rico
  12. 2.1 2 km SW of La Parguera, Puerto Rico
  13. 2.0 10 km SSE of Maria Antonia, Puerto Rico
  14. 2.5 16 km SSE of Guánica, Puerto Rico
  15. 1.6 20 km S of La Parguera, 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.