QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

1 km WSW of Bayamon, Puerto Rico

· 18 km deep · released about 700 lb of TNT

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10 km30 km60 km120 km N Cidra Municipio 3 kmCayey Municipio 8 kmAguas Buenas Municipio 9 kmCaguas Municipio 9 kmComerío Municipio 11 kmAibonito Municipio 15 kmSan Lorenzo Municipio 17 kmNaranjito Municipio 18 kmGuaynabo Municipio 19 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 2.9 (md)
Depth
18 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Cidra Municipio, 3 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 335 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 700 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 15,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.4× the energy of this one
  4. This earthquake M 2.9 about 700 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 18.1737, -66.1308. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cidra Municipio, PR 3 km (2 mi) E of here earthquakes near Cidra Municipio
Cayey Municipio, PR 8 km (5 mi) NNE of here earthquakes near Cayey Municipio
Aguas Buenas Municipio, PR 9 km (6 mi) S of here earthquakes near Aguas Buenas Municipio
Caguas Municipio, PR 9 km (6 mi) WSW of here earthquakes near Caguas Municipio
Comerío Municipio, PR 11 km (7 mi) ESE of here earthquakes near Comerío Municipio
Aibonito Municipio, PR 15 km (9 mi) ENE of here earthquakes near Aibonito Municipio

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

Aftershocks so far

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

  1. 1.9 3 km WNW of Orocovis, Puerto Rico
  2. 2.4 1 km WSW of Las Ochenta, Puerto Rico
  3. 1.9 3 km SSW of Salinas, Puerto Rico
  4. 2.0 4 km WNW of Yaurel, Puerto Rico
  5. 3.1 9 km SSE of Daguao, Puerto Rico
  6. 2.8 10 km N of Brenas, Puerto Rico
  7. 2.6 2 km SW of Campo Rico, Puerto Rico
  8. 2.2 3 km S of Río Cañas Abajo, Puerto Rico
  9. 1.9 4 km SE of Jagual, Puerto Rico
  10. 2.6 5 km NNW of Aguas Buenas, Puerto Rico
  11. 2.7 5 km WSW of Central Aguirre, Puerto Rico
  12. 2.1 5 km WSW of Central Aguirre, Puerto Rico
  13. 2.3 2 km S of G. L. Garcia, Puerto Rico
  14. 1.9 1 km ENE of Cayey, Puerto Rico
  15. 1.8 2 km E of Cayey, 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 2016-12-05 — it released about 340 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.