QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8Md

13 km S of Pole Ojea, Puerto Rico

· 3.0 km deep · released about 15 lb of TNT

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10 km30 km60 km120 km N Cabo Rojo Municipio 16 kmLajas Municipio 20 kmGuánica Municipio 29 kmHormigueros Municipio 32 kmSan Germán Municipio 32 kmSabana Grande Municipio 36 kmYauco Municipio 43 kmGuayanilla Municipio 44 kmMaricao Municipio 44 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
3.0 km below the surface
Felt
no reports yet
Nearest
Cabo Rojo Municipio, 16 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3627 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 5.7 710,000× the energy of this one
  3. Around the size people start to feel M 3.0 63× 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 17.8540, -67.1804. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cabo Rojo Municipio, PR 16 km (10 mi) S of here earthquakes near Cabo Rojo Municipio
Lajas Municipio, PR 20 km (13 mi) SW of here earthquakes near Lajas Municipio
Guánica Municipio, PR 29 km (18 mi) WSW of here earthquakes near Guánica Municipio
Hormigueros Municipio, PR 32 km (20 mi) SSW of here earthquakes near Hormigueros Municipio
San Germán Municipio, PR 32 km (20 mi) SSW of here earthquakes near San Germán Municipio
Sabana Grande Municipio, PR 36 km (22 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

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

  1. 2.4 8 km SSE of La Parguera, Puerto Rico
  2. 2.3 20 km S of La Parguera, Puerto Rico
  3. 2.3 13 km SSW of Guánica, Puerto Rico
  4. 2.4 1 km W of San Germán, Puerto Rico
  5. 1.7 1 km WNW of Monte Grande, Puerto Rico
  6. 2.0 20 km SSW of Guánica, Puerto Rico
  7. 2.5 11 km NW of Puerto Real, Puerto Rico
  8. 1.9 3 km ESE of Las Marías, Puerto Rico
  9. 2.3 10 km NNW of Puerto Real, Puerto Rico
  10. 2.4 8 km WSW of Mayagüez, Puerto Rico
  11. 2.4 3 km WSW of La Parguera, Puerto Rico
  12. 1.7 14 km W of Puerto Real, Puerto Rico
  13. 2.3 9 km WSW of Puerto Real, Puerto Rico
  14. 2.0 6 km SSW of Tallaboa, Puerto Rico
  15. 2.2 3 km NW of Hormigueros, 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.