QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

89 km N of San Juan, Puerto Rico

· 38 km deep · released about 490 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Loíza Municipio 91 kmDorado Municipio 92 kmToa Baja Municipio 92 kmCataño Municipio 93 kmSan Juan Municipio 94 kmCarolina Municipio 97 kmVega Alta Municipio 99 kmVega Baja Municipio 99 kmRío Grande Municipio 101 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
38 km below the surface
Felt
no reports yet
Nearest
Loíza Municipio, 91 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2928 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 490 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 31,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 22,000× 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 490 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 19.2656, -66.0020. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Loíza Municipio, PR 91 km (57 mi) N of here earthquakes near Loíza Municipio
Dorado Municipio, PR 92 km (57 mi) NNE of here earthquakes near Dorado Municipio
Toa Baja Municipio, PR 92 km (57 mi) NNE of here earthquakes near Toa Baja Municipio
Cataño Municipio, PR 93 km (58 mi) N of here earthquakes near Cataño Municipio
San Juan Municipio, PR 94 km (58 mi) N of here earthquakes near San Juan Municipio
Carolina Municipio, PR 97 km (60 mi) N of here earthquakes near Carolina Municipio

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

Aftershocks so far

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

  1. 3.0 108 km N of Suárez, Puerto Rico
  2. 3.2 119 km N of Suárez, Puerto Rico
  3. 2.8 70 km N of San Juan, Puerto Rico
  4. 2.2 78 km N of Tierras Nuevas Poniente, Puerto Rico
  5. 3.2 86 km N of Suárez, Puerto Rico
  6. 2.7 46 km N of San Juan, Puerto Rico
  7. 3.0 84 km N of Brenas, Puerto Rico
  8. 2.8 71 km N of Brenas, Puerto Rico
  9. 2.9 66 km N of Brenas, Puerto Rico
  10. 2.6 66 km N of Brenas, Puerto Rico
  11. 2.5 64 km N of Brenas, Puerto Rico
  12. 2.5 Puerto Rico region
  13. 2.3 72 km N of Brenas, Puerto Rico
  14. 3.3 69 km N of Brenas, Puerto Rico
  15. 2.8 69 km N of Brenas, 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 4.8 on 2017-08-18 — it released about 970 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.