QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

5 km E of Lares, Puerto Rico

· 8.0 km deep · released about 16 lb of TNT

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10 km30 km60 km120 km N Lares Municipio 5 kmUtuado Municipio 13 kmAdjuntas Municipio 13 kmSan Sebastián Municipio 16 kmMaricao Municipio 17 kmHatillo Municipio 17 kmLas Marías Municipio 18 kmCamuy Municipio 18 kmYauco Municipio 23 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
8.0 km below the surface
Felt
no reports yet
Nearest
Lares Municipio, 5 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2303 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 18.2856, -66.8230. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lares Municipio, PR 5 km (3 mi) E of here earthquakes near Lares Municipio
Utuado Municipio, PR 13 km (8 mi) W of here earthquakes near Utuado Municipio
Adjuntas Municipio, PR 13 km (8 mi) NNW of here earthquakes near Adjuntas Municipio
San Sebastián Municipio, PR 16 km (10 mi) ESE of here earthquakes near San Sebastián Municipio
Maricao Municipio, PR 17 km (11 mi) NE of here earthquakes near Maricao Municipio
Hatillo Municipio, PR 17 km (11 mi) S of here earthquakes near Hatillo Municipio

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

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

  1. 2.3 10 km SSW of Tallaboa, Puerto Rico
  2. 1.6 3 km SSW of Peñuelas, Puerto Rico
  3. 2.9 10 km SSW of Tallaboa, Puerto Rico
  4. 2.8 5 km S of Tallaboa, Puerto Rico
  5. 2.0 1 km SW of Guayanilla, Puerto Rico
  6. 2.1 5 km S of Indios, Puerto Rico
  7. 2.9 1 km W of Guayanilla, Puerto Rico
  8. 1.9 5 km S of Tallaboa, Puerto Rico
  9. 2.4 4 km SW of Indios, Puerto Rico
  10. 2.4 4 km SSE of Magas Arriba, Puerto Rico
  11. 1.8 2 km SW of Guánica, Puerto Rico
  12. 2.6 1 km SW of Santo Domingo, Puerto Rico
  13. 1.6 0 km NW of Guayanilla, Puerto Rico
  14. 2.1 3 km WSW of Indios, Puerto Rico
  15. 2.2 6 km SE of Maria Antonia, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 6.4 on 2020-01-07 — it released about 7,400,000 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

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