QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

0 km S of San Sebastián, Puerto Rico

· 12 km deep · released about 180 lb of TNT

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10 km30 km60 km120 km N San Sebastián Municipio 2 kmMoca Municipio 11 kmLas Marías Municipio 11 kmLares Municipio 14 kmAñasco Municipio 15 kmQuebradillas Municipio 17 kmIsabela Municipio 17 kmMaricao Municipio 18 kmCamuy Municipio 19 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 2.5 (md)
Depth
12 km below the surface
Felt
no reports yet
Nearest
San Sebastián Municipio, 2 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 328 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 180 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 86,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 61,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.4× the energy of this one
  4. This earthquake M 2.5 about 180 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 18.3293, -66.9917. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Sebastián Municipio, PR 2 km (1 mi) W of here earthquakes near San Sebastián Municipio
Moca Municipio, PR 11 km (7 mi) ESE of here earthquakes near Moca Municipio
Las Marías Municipio, PR 11 km (7 mi) N of here earthquakes near Las Marías Municipio
Lares Municipio, PR 14 km (9 mi) WNW of here earthquakes near Lares Municipio
Añasco Municipio, PR 15 km (10 mi) ENE of here earthquakes near Añasco Municipio
Quebradillas Municipio, PR 17 km (10 mi) SSW of here earthquakes near Quebradillas Municipio

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

Aftershocks so far

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

  1. 3.2 12 km NNE of Carrizales, Puerto Rico
  2. 3.3 17 km SW of Stella, Puerto Rico
  3. 2.1 4 km ESE of La Parguera, Puerto Rico
  4. 2.1 2 km SW of Indios, Puerto Rico
  5. 1.7 7 km WSW of Fuig, Puerto Rico
  6. 2.1 2 km SW of Indios, Puerto Rico
  7. 2.5 4 km SW of Guánica, Puerto Rico
  8. 3.0 2 km SE of Yauco, Puerto Rico
  9. 2.4 3 km SSW of Indios, Puerto Rico
  10. 2.5 2 km S of Puerto Real, Puerto Rico
  11. 2.5 2 km NNE of Boquerón, Puerto Rico
  12. 2.3 3 km SSW of Puerto Real, Puerto Rico
  13. 2.3 2 km ESE of Yauco, Puerto Rico
  14. 2.8 1 km SW of Indios, Puerto Rico
  15. 2.5 4 km ESE 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.

For this area

The largest earthquake within 50 km in our catalogue was M 6.4 on 2020-01-07 — it released about 680,000 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.