QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

3 km NNW of Quebradillas, Puerto Rico

· 22 km deep · released about 530 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Quebradillas Municipio 5 kmIsabela Municipio 6 kmCamuy Municipio 12 kmHatillo Municipio 18 kmMoca Municipio 19 kmSan Sebastián Municipio 19 kmAguadilla Municipio 20 kmLares Municipio 27 kmAguada Municipio 28 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 2.8 (md)
Depth
22 km below the surface
Felt
no reports yet
Nearest
Quebradillas Municipio, 5 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2176 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 530 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 29,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 20,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.8× the energy of this one
  4. This earthquake M 2.8 about 530 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 18.5046, -66.9578. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Quebradillas Municipio, PR 5 km (3 mi) NW of here earthquakes near Quebradillas Municipio
Isabela Municipio, PR 6 km (4 mi) ENE of here earthquakes near Isabela Municipio
Camuy Municipio, PR 12 km (7 mi) WNW of here earthquakes near Camuy Municipio
Hatillo Municipio, PR 18 km (11 mi) WNW of here earthquakes near Hatillo Municipio
Moca Municipio, PR 19 km (12 mi) NE of here earthquakes near Moca Municipio
San Sebastián Municipio, PR 19 km (12 mi) N of here earthquakes near San Sebastián Municipio

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

Aftershocks so far

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

  1. 1.8 2 km SE of Maricao, Puerto Rico
  2. 1.6 4 km N of Lluveras, Puerto Rico
  3. 2.2 7 km SW of La Playa, Puerto Rico
  4. 3.2 10 km W of Mayagüez, Puerto Rico
  5. 1.9 13 km W of Adjuntas, Puerto Rico
  6. 2.7 20 km N of San Antonio, Puerto Rico
  7. 3.1 2 km SSE of Piedra Gorda, Puerto Rico
  8. 1.6 6 km NNE of Lluveras, Puerto Rico
  9. 1.7 7 km ENE of Maricao, Puerto Rico
  10. 2.6 Puerto Rico region
  11. 1.9 5 km NNW of Puerto Real, Puerto Rico
  12. 2.5 19 km NNE of Isabela, Puerto Rico
  13. 1.7 6 km NE of Sabana Grande, Puerto Rico
  14. 2.7 2 km WSW of Mayagüez, Puerto Rico
  15. 2.7 41 km NNW of San Antonio, 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 4.3 on 2017-10-14 — it released about 160 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.