QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

1 km ESE of Gurabo, Puerto Rico

· 8.6 km deep · released about 510 lb of TNT

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10 km30 km60 km120 km N Gurabo Municipio 4 kmJuncos Municipio 6 kmTrujillo Alto Municipio 11 kmCaguas Municipio 11 kmLas Piedras Municipio 11 kmCanóvanas Municipio 12 kmSan Lorenzo Municipio 12 kmCarolina Municipio 16 kmAguas Buenas Municipio 18 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
8.6 km below the surface
Felt
no reports yet
Nearest
Gurabo Municipio, 4 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 849 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 510 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 30,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 21,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.9× the energy of this one
  4. This earthquake M 2.8 about 510 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 18.2503, -65.9568. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Gurabo Municipio, PR 4 km (2 mi) SE of here earthquakes near Gurabo Municipio
Juncos Municipio, PR 6 km (4 mi) WNW of here earthquakes near Juncos Municipio
Trujillo Alto Municipio, PR 11 km (7 mi) SSE of here earthquakes near Trujillo Alto Municipio
Caguas Municipio, PR 11 km (7 mi) ENE of here earthquakes near Caguas Municipio
Las Piedras Municipio, PR 11 km (7 mi) NW of here earthquakes near Las Piedras Municipio
Canóvanas Municipio, PR 12 km (7 mi) SW of here earthquakes near Canóvanas Municipio

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

Aftershocks so far

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

  1. 2.8 1 km SE of Naranjito, Puerto Rico
  2. 2.3 10 km SSE of Lamboglia, Puerto Rico
  3. 2.1 7 km SSW of Corozal, Puerto Rico
  4. 2.7 5 km SSE of G. L. Garcia, Puerto Rico
  5. 2.6 1 km NW of El Negro, Puerto Rico
  6. 2.3 0 km ENE of Parcelas La Milagrosa, Puerto Rico
  7. 3.4 9 km NNE of San Juan, Puerto Rico
  8. 2.8 5 km SSE of Bajandas, Puerto Rico
  9. 3.2 14 km N of Dorado, Puerto Rico
  10. 2.1 4 km NW of Orocovis, Puerto Rico
  11. 2.2 6 km SSE of Bajandas, Puerto Rico
  12. 3.3 5 km SSE of Bajandas, Puerto Rico
  13. 3.2 0 km ENE of Cidra, Puerto Rico
  14. 2.2 2 km NW of Orocovis, Puerto Rico
  15. 3.0 6 km SSE of Bajandas, 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 4.6 on 2016-12-05 — it released about 470 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.