QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

76 km NNE of San Juan, Puerto Rico

· 25 km deep · released about 750 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Loíza Municipio 78 kmToa Baja Municipio 81 kmCataño Municipio 81 kmDorado Municipio 81 kmSan Juan Municipio 81 kmCarolina Municipio 83 kmRío Grande Municipio 87 kmVega Alta Municipio 88 kmVega Baja Municipio 90 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 2.9 (md)
Depth
25 km below the surface
Felt
no reports yet
Nearest
Loíza Municipio, 78 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2029 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 750 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 20,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 14,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.3× the energy of this one
  4. This earthquake M 2.9 about 750 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 19.1461, -65.9586. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Loíza Municipio, PR 78 km (48 mi) N of here earthquakes near Loíza Municipio
Toa Baja Municipio, PR 81 km (50 mi) NNE of here earthquakes near Toa Baja Municipio
Cataño Municipio, PR 81 km (50 mi) NNE of here earthquakes near Cataño Municipio
Dorado Municipio, PR 81 km (50 mi) NNE of here earthquakes near Dorado Municipio
San Juan Municipio, PR 81 km (51 mi) N of here earthquakes near San Juan Municipio
Carolina Municipio, PR 83 km (52 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

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

  1. 3.1 61 km N of Brenas, Puerto Rico
  2. 3.2 60 km N of Loíza, Puerto Rico
  3. 2.7 71 km NNE of San Juan, Puerto Rico
  4. 3.9 78 km N of San Juan, Puerto Rico
  5. 3.5 121 km N of San Juan, Puerto Rico
  6. 3.5 69 km N of Brenas, Puerto Rico
  7. 3.3 68 km N of Brenas, Puerto Rico
  8. 3.5 69 km N of Brenas, Puerto Rico
  9. 3.5 66 km N of Brenas, Puerto Rico
  10. 3.6 94 km N of Brenas, Puerto Rico
  11. 3.7 107 km N of Brenas, Puerto Rico
  12. 2.9 47 km N of Suárez, Puerto Rico
  13. 3.4 50 km N of Brenas, Puerto Rico
  14. 3.5 72 km N of Brenas, Puerto Rico
  15. 3.4 65 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 640 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.