QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

10 km NNE of Isabela, Puerto Rico

· 77 km deep · released about 19 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Isabela Municipio 11 kmQuebradillas Municipio 14 kmCamuy Municipio 20 kmAguadilla Municipio 21 kmHatillo Municipio 25 kmMoca Municipio 25 kmSan Sebastián Municipio 28 kmAguada Municipio 31 kmLares Municipio 36 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 1.9 (md)
Depth
77 km below the surface
Felt
no reports yet
Nearest
Isabela Municipio, 11 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2592 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 19 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 790,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 560,000× the energy of this one
  3. Around the size people start to feel M 3.0 50× the energy of this one
  4. This earthquake M 1.9 about 19 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 18.5826, -66.9820. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Isabela Municipio, PR 11 km (7 mi) NNE of here earthquakes near Isabela Municipio
Quebradillas Municipio, PR 14 km (9 mi) NNW of here earthquakes near Quebradillas Municipio
Camuy Municipio, PR 20 km (12 mi) NW of here earthquakes near Camuy Municipio
Aguadilla Municipio, PR 21 km (13 mi) NE of here earthquakes near Aguadilla Municipio
Hatillo Municipio, PR 25 km (16 mi) NW of here earthquakes near Hatillo Municipio
Moca Municipio, PR 25 km (16 mi) NNE of here earthquakes near Moca Municipio

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

Aftershocks so far

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

  1. 2.6 39 km NW of San Antonio, Puerto Rico
  2. 1.6 9 km ESE of Maricao, Puerto Rico
  3. 2.3 10 km WNW of San Antonio, Puerto Rico
  4. 1.5 8 km WNW of Adjuntas, Puerto Rico
  5. 1.6 8 km W of Adjuntas, Puerto Rico
  6. 1.9 57 km N of Isabela, Puerto Rico
  7. 2.6 1 km NNW of Moca, Puerto Rico
  8. 2.4 37 km NNW of San Antonio, Puerto Rico
  9. 2.7 45 km NNW of San Antonio, Puerto Rico
  10. 2.1 45 km N of Hatillo, Puerto Rico
  11. 2.4 22 km NW of Rincón, Puerto Rico
  12. 2.2 33 km NNE of Isabela, Puerto Rico
  13. 2.0 25 km NNE of Isabela, Puerto Rico
  14. 2.2 41 km N of Hatillo, Puerto Rico
  15. 2.0 4 km ENE of Mayagüez, 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 2017-10-14 — it released about 4,400 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.