QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5md

5 km SSW of Guaynabo, Puerto Rico

· 19 km deep · released about 5.6 lb of TNT

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10 km30 km60 km120 km N Guaynabo Municipio 4 kmBayamón Municipio 5 kmAguas Buenas Municipio 7 kmToa Alta Municipio 12 kmNaranjito Municipio 12 kmComerío Municipio 13 kmSan Juan Municipio 14 kmCataño Municipio 14 kmTrujillo Alto Municipio 14 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 1.5 (md)
Depth
19 km below the surface
Felt
no reports yet
Nearest
Guaynabo Municipio, 4 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2819 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 5.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
  3. Around the size people start to feel M 3.0 170× the energy of this one
  4. This earthquake M 1.5 about 5.6 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 18.3166, -66.1393. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guaynabo Municipio, PR 4 km (3 mi) SW of here earthquakes near Guaynabo Municipio
Bayamón Municipio, PR 5 km (3 mi) SE of here earthquakes near Bayamón Municipio
Aguas Buenas Municipio, PR 7 km (4 mi) N of here earthquakes near Aguas Buenas Municipio
Toa Alta Municipio, PR 12 km (8 mi) ESE of here earthquakes near Toa Alta Municipio
Naranjito Municipio, PR 12 km (8 mi) ENE of here earthquakes near Naranjito Municipio
Comerío Municipio, PR 13 km (8 mi) NE of here earthquakes near Comerío Municipio

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

Aftershocks so far

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

  1. 2.5 1 km SSW of Bayamon, Puerto Rico
  2. 1.9 5 km SE of Arroyo, Puerto Rico
  3. 2.6 Puerto Rico region
  4. 1.7 1 km NW of Parcelas Peñuelas, Puerto Rico
  5. 2.0 9 km SE of Arroyo, Puerto Rico
  6. 1.8 1 km NW of Aguas Buenas, Puerto Rico
  7. 2.0 Puerto Rico region
  8. 2.9 3 km N of Naranjito, Puerto Rico
  9. 1.6 1 km ESE of Los Llanos, Puerto Rico
  10. 1.9 1 km W of Jauca, Puerto Rico
  11. 1.6 1 km NNW of Jayuya, Puerto Rico
  12. 2.1 9 km SSE of Arroyo, Puerto Rico
  13. 2.3 9 km SSE of Arroyo, Puerto Rico
  14. 2.1 5 km SSE of Arroyo, Puerto Rico
  15. 1.9 4 km N of Palmarejo, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.