QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

4 km ENE of Guaynabo, Puerto Rico

· 126 km deep · released about 150 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guaynabo Municipio 5 kmSan Juan Municipio 6 kmTrujillo Alto Municipio 8 kmBayamón Municipio 10 kmCarolina Municipio 12 kmCataño Municipio 12 kmAguas Buenas Municipio 13 kmGurabo Municipio 14 kmToa Baja Municipio 16 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
126 km below the surface
Felt
no reports yet
Nearest
Guaynabo Municipio, 5 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2736 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 150 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 5.8 100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 72,000× the energy of this one
  3. Around the size people start to feel M 3.0 6.5× the energy of this one
  4. This earthquake M 2.5 about 150 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 18.3660, -66.0740. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guaynabo Municipio, PR 5 km (3 mi) ENE of here earthquakes near Guaynabo Municipio
San Juan Municipio, PR 6 km (4 mi) S of here earthquakes near San Juan Municipio
Trujillo Alto Municipio, PR 8 km (5 mi) WNW of here earthquakes near Trujillo Alto Municipio
Bayamón Municipio, PR 10 km (6 mi) E of here earthquakes near Bayamón Municipio
Carolina Municipio, PR 12 km (7 mi) WSW of here earthquakes near Carolina Municipio
Cataño Municipio, PR 12 km (7 mi) SE of here earthquakes near Cataño Municipio

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

Aftershocks so far

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

  1. 2.7 1 km E of Guaynabo, Puerto Rico
  2. 1.9 5 km SSE of Arroyo, Puerto Rico
  3. 1.5 2 km NNE of San Lorenzo, Puerto Rico
  4. 2.6 6 km ESE of Pájaros, Puerto Rico
  5. 2.9 2 km NE of Trujillo Alto, Puerto Rico
  6. 2.3 4 km N of Brenas, Puerto Rico
  7. 1.9 1 km NE of Jobos, Puerto Rico
  8. 2.3 0 km ENE of Jobos, Puerto Rico
  9. 2.0 8 km NE of Tierras Nuevas Poniente, Puerto Rico
  10. 1.6 2 km ESE of Cataño, Puerto Rico
  11. 2.3 10 km NNW of San Juan, Puerto Rico
  12. 2.5 5 km SSE of El Negro, Puerto Rico
  13. 4.1 5 km SSE of El Negro, Puerto Rico
  14. 2.1 1 km NNE of El Negro, Puerto Rico
  15. 2.1 5 km S of Palo Seco, 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 4.6 on 2019-03-12 — it released about 1,600 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.