QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

3 km NNW of Tallaboa, Puerto Rico

· 20 km deep · released about 16 lb of TNT

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10 km30 km60 km120 km N Peñuelas Municipio 1 kmGuayanilla Municipio 7 kmPonce Municipio 13 kmYauco Municipio 15 kmAdjuntas Municipio 18 kmGuánica Municipio 22 kmSabana Grande Municipio 24 kmJuana Díaz Municipio 25 kmJayuya Municipio 26 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
20 km below the surface
Felt
no reports yet
Nearest
Peñuelas Municipio, 1 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3053 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 18.0206, -66.7301. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Peñuelas Municipio, PR 1 km (0 mi) SSW of here earthquakes near Peñuelas Municipio
Guayanilla Municipio, PR 7 km (5 mi) ENE of here earthquakes near Guayanilla Municipio
Ponce Municipio, PR 13 km (8 mi) W of here earthquakes near Ponce Municipio
Yauco Municipio, PR 15 km (10 mi) ESE of here earthquakes near Yauco Municipio
Adjuntas Municipio, PR 18 km (11 mi) S of here earthquakes near Adjuntas Municipio
Guánica Municipio, PR 22 km (14 mi) ENE of here earthquakes near Guánica 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. 2.0 5 km SW of Las Marías, Puerto Rico
  2. 1.6 1 km SW of Adjuntas, Puerto Rico
  3. 1.9 0 km SE of Adjuntas, Puerto Rico
  4. 1.9 1 km NE of Adjuntas, Puerto Rico
  5. 1.8 1 km SSW of Adjuntas, Puerto Rico
  6. 2.5 2 km S of Adjuntas, Puerto Rico
  7. 2.4 1 km SSW of Adjuntas, Puerto Rico
  8. 2.6 2 km SSW of Adjuntas, Puerto Rico
  9. 1.9 3 km NE of Hormigueros, Puerto Rico
  10. 2.1 1 km SSE of Lluveras, Puerto Rico
  11. 1.7 20 km SSE of Maria Antonia, Puerto Rico
  12. 1.8 19 km SSE of Maria Antonia, Puerto Rico
  13. 2.3 8 km NNE of Jayuya, Puerto Rico
  14. 2.4 3 km N of Lluveras, Puerto Rico
  15. 2.2 1 km NNE 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.