QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

31 km NNE of San Juan, Puerto Rico

· 8.0 km deep · released about 160 lb of TNT

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10 km30 km60 km120 km N Loíza Municipio 31 kmSan Juan Municipio 35 kmCataño Municipio 36 kmCarolina Municipio 36 kmToa Baja Municipio 38 kmDorado Municipio 41 kmRío Grande Municipio 43 kmTrujillo Alto Municipio 43 kmCanóvanas Municipio 45 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
8.0 km below the surface
Felt
no reports yet
Nearest
Loíza Municipio, 31 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2799 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 18.7235, -65.9730. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Loíza Municipio, PR 31 km (19 mi) N of here earthquakes near Loíza Municipio
San Juan Municipio, PR 35 km (22 mi) NNE of here earthquakes near San Juan Municipio
Cataño Municipio, PR 36 km (22 mi) NNE of here earthquakes near Cataño Municipio
Carolina Municipio, PR 36 km (23 mi) N of here earthquakes near Carolina Municipio
Toa Baja Municipio, PR 38 km (23 mi) NE of here earthquakes near Toa Baja Municipio
Dorado Municipio, PR 41 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

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

  1. 2.8 29 km NE of Luquillo, Puerto Rico
  2. 1.9 64 km NNE of San Juan, Puerto Rico
  3. 3.1 74 km N of San Juan, Puerto Rico
  4. 2.5 4 km ENE of Guaynabo, Puerto Rico
  5. 2.5 1 km NE of Suárez, Puerto Rico
  6. 2.0 42 km NNE of Luquillo, Puerto Rico
  7. 1.7 3 km ENE of Vieques, Puerto Rico
  8. 2.1 4 km N of Suárez, Puerto Rico
  9. 2.8 42 km NNE of Luquillo, Puerto Rico
  10. 2.9 39 km NNE of Luquillo, Puerto Rico
  11. 2.1 12 km NE of Vieques, Puerto Rico
  12. 2.7 14 km NE of Luquillo, Puerto Rico
  13. 2.0 14 km NE of Luquillo, Puerto Rico
  14. 2.2 16 km N of San Juan, Puerto Rico
  15. 2.1 54 km N 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 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.