QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

2 km WNW of Mora, Puerto Rico

· 17 km deep · released about 780 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Isabela Municipio 4 kmAguadilla Municipio 10 kmMoca Municipio 11 kmQuebradillas Municipio 13 kmAguada Municipio 18 kmSan Sebastián Municipio 18 kmCamuy Municipio 20 kmAñasco Municipio 22 kmRincón Municipio 26 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
17 km below the surface
Felt
no reports yet
Nearest
Isabela Municipio, 4 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 184 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 780 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 19,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 14,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.2× the energy of this one
  4. This earthquake M 2.9 about 780 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 18.4717, -67.0507. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Isabela Municipio, PR 4 km (3 mi) WSW of here earthquakes near Isabela Municipio
Aguadilla Municipio, PR 10 km (6 mi) E of here earthquakes near Aguadilla Municipio
Moca Municipio, PR 11 km (7 mi) NNE of here earthquakes near Moca Municipio
Quebradillas Municipio, PR 13 km (8 mi) W of here earthquakes near Quebradillas Municipio
Aguada Municipio, PR 18 km (11 mi) NE of here earthquakes near Aguada Municipio
San Sebastián Municipio, PR 18 km (11 mi) NNW of here earthquakes near San Sebastián Municipio

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

Aftershocks so far

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

  1. 2.5 16 km N of Arecibo, Puerto Rico
  2. 2.8 45 km NNW of San Antonio, Puerto Rico
  3. 1.9 10 km WNW of Adjuntas, Puerto Rico
  4. 2.6 23 km NNE of Isabela, Puerto Rico
  5. 2.0 1 km N of Lluveras, Puerto Rico
  6. 2.2 6 km NNE of Sabana Eneas, Puerto Rico
  7. 2.1 5 km NNE of Adjuntas, Puerto Rico
  8. 1.6 8 km NW of Adjuntas, Puerto Rico
  9. 2.7 5 km SE of Lares, Puerto Rico
  10. 3.3 8 km NE of Isabela, Puerto Rico
  11. 3.0 43 km NNW of San Antonio, Puerto Rico
  12. 3.5 5 km WNW of Mayagüez, Puerto Rico
  13. 2.4 4 km SSE of Utuado, Puerto Rico
  14. 2.1 4 km SSE of Utuado, Puerto Rico
  15. 2.4 5 km N of Adjuntas, 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 4.3 on 2019-09-05 — it released about 110 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.