QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

35 km NNE of San Juan, Puerto Rico

· 34 km deep · released about 160 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Loíza Municipio 38 kmCataño Municipio 39 kmSan Juan Municipio 40 kmToa Baja Municipio 40 kmCarolina Municipio 42 kmDorado Municipio 42 kmTrujillo Alto Municipio 49 kmGuaynabo Municipio 49 kmRío Grande Municipio 50 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 2.5 (md)
Depth
34 km below the surface
Felt
no reports yet
Nearest
Loíza Municipio, 38 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3086 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 160 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 95,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 68,000× the energy of this one
  3. Around the size people start to feel M 3.0 6× the energy of this one
  4. This earthquake M 2.5 about 160 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 18.7761, -66.0146. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Loíza Municipio, PR 38 km (23 mi) NNW of here earthquakes near Loíza Municipio
Cataño Municipio, PR 39 km (25 mi) NNE of here earthquakes near Cataño Municipio
San Juan Municipio, PR 40 km (25 mi) N of here earthquakes near San Juan Municipio
Toa Baja Municipio, PR 40 km (25 mi) NNE of here earthquakes near Toa Baja Municipio
Carolina Municipio, PR 42 km (26 mi) N of here earthquakes near Carolina Municipio
Dorado Municipio, PR 42 km (26 mi) NE of here earthquakes near Dorado Municipio

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

Aftershocks so far

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

  1. 1.9 46 km N of Brenas, Puerto Rico
  2. 1.7 1 km SE of Bayamón, Puerto Rico
  3. 2.8 4 km SE of Cataño, Puerto Rico
  4. 2.3 4 km N of Brenas, Puerto Rico
  5. 2.6 31 km N of San Juan, Puerto Rico
  6. 2.5 33 km NNW of Brenas, Puerto Rico
  7. 2.5 4 km NNE of Guaynabo, Puerto Rico
  8. 2.1 44 km NNE of Luquillo, Puerto Rico
  9. 2.3 2 km SSW of Bayamón, Puerto Rico
  10. 2.5 12 km NNE of Brenas, Puerto Rico
  11. 2.8 74 km N of Brenas, Puerto Rico
  12. 2.8 2 km NW of Dorado, Puerto Rico
  13. 2.5 0 km ENE of San Juan, Puerto Rico
  14. 2.2 5 km NNW of Levittown, Puerto Rico
  15. 1.9 9 km N of Levittown, 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 3,000 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.