QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

4 km NW of Bairoa, Puerto Rico

· 117 km deep · released about 550 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Aguas Buenas Municipio 7 kmGuaynabo Municipio 8 kmTrujillo Alto Municipio 8 kmCaguas Municipio 9 kmGurabo Municipio 9 kmBayamón Municipio 13 kmSan Juan Municipio 15 kmCarolina Municipio 16 kmCidra Municipio 16 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
117 km below the surface
Felt
no reports yet
Nearest
Aguas Buenas Municipio, 7 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3109 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 550 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 28,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 19,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.7× the energy of this one
  4. This earthquake M 2.8 about 550 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 18.2891, -66.0668. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Aguas Buenas Municipio, PR 7 km (5 mi) ENE of here earthquakes near Aguas Buenas Municipio
Guaynabo Municipio, PR 8 km (5 mi) SE of here earthquakes near Guaynabo Municipio
Trujillo Alto Municipio, PR 8 km (5 mi) SW of here earthquakes near Trujillo Alto Municipio
Caguas Municipio, PR 9 km (5 mi) N of here earthquakes near Caguas Municipio
Gurabo Municipio, PR 9 km (6 mi) WNW of here earthquakes near Gurabo Municipio
Bayamón Municipio, PR 13 km (8 mi) ESE of here earthquakes near Bayamón 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. 1.8 2 km S of Palmas, Puerto Rico
  2. 1.6 4 km SSE of Palmas, Puerto Rico
  3. 2.0 4 km S of Palmas, Puerto Rico
  4. 1.5 5 km SSW of Lamboglia, Puerto Rico
  5. 1.9 1 km NNE of Buena Vista, Puerto Rico
  6. 2.0 0 km S of Palmas, Puerto Rico
  7. 1.7 5 km SSW of Lamboglia, Puerto Rico
  8. 2.3 5 km SSW of Lamboglia, Puerto Rico
  9. 2.0 1 km NNE of Buena Vista, Puerto Rico
  10. 2.3 5 km SSW of Lamboglia, Puerto Rico
  11. 2.1 5 km SSW of Lamboglia, Puerto Rico
  12. 1.6 4 km N of Los Llanos, Puerto Rico
  13. 2.2 6 km SSW of Lamboglia, Puerto Rico
  14. 2.5 5 km S of Palmas, Puerto Rico
  15. 2.0 2 km N of Yaurel, 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 440 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.