QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

39 km N of San Juan, Puerto Rico

· 42 km deep · released about 72 lb of TNT

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10 km30 km60 km120 km N Toa Baja Municipio 43 kmCataño Municipio 43 kmDorado Municipio 44 kmLoíza Municipio 44 kmSan Juan Municipio 45 kmCarolina Municipio 49 kmVega Alta Municipio 51 kmGuaynabo Municipio 54 kmVega Baja Municipio 54 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 2.3 (md)
Depth
42 km below the surface
Felt
no reports yet
Nearest
Toa Baja Municipio, 43 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2556 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 72 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 210,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 150,000× the energy of this one
  3. Around the size people start to feel M 3.0 13× the energy of this one
  4. This earthquake M 2.3 about 72 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 18.8241, -66.0703. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Toa Baja Municipio, PR 43 km (27 mi) NNE of here earthquakes near Toa Baja Municipio
Cataño Municipio, PR 43 km (27 mi) N of here earthquakes near Cataño Municipio
Dorado Municipio, PR 44 km (27 mi) NNE of here earthquakes near Dorado Municipio
Loíza Municipio, PR 44 km (27 mi) NNW of here earthquakes near Loíza Municipio
San Juan Municipio, PR 45 km (28 mi) N of here earthquakes near San Juan Municipio
Carolina Municipio, PR 49 km (30 mi) NNW of here earthquakes near Carolina Municipio

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

Aftershocks so far

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

  1. 2.6 59 km N of Suárez, Puerto Rico
  2. 2.2 43 km N of Suárez, Puerto Rico
  3. 2.0 4 km NNE of Levittown, Puerto Rico
  4. 1.9 51 km NNE of Vieques, Puerto Rico
  5. 2.8 Puerto Rico region
  6. 2.0 61 km N of Loíza, Puerto Rico
  7. 2.4 51 km N of Brenas, Puerto Rico
  8. 2.7 66 km N of San Juan, Puerto Rico
  9. 2.5 28 km NNE of San Juan, Puerto Rico
  10. 2.7 0 km S of Cataño, Puerto Rico
  11. 2.4 71 km N of Suárez, Puerto Rico
  12. 2.0 55 km N of Suárez, Puerto Rico
  13. 2.2 Puerto Rico region
  14. 2.5 67 km NNE of Suárez, Puerto Rico
  15. 2.2 67 km NNE of San Juan, 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 6,700 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.