QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

18 km NNE of Arecibo, Puerto Rico

· 14 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Barceloneta Municipio 20 kmArecibo Municipio 22 kmHatillo Municipio 26 kmManatí Municipio 26 kmFlorida Municipio 30 kmCamuy Municipio 30 kmVega Baja Municipio 33 kmQuebradillas Municipio 34 kmVega Alta Municipio 39 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 1.8 (md)
Depth
14 km below the surface
Felt
no reports yet
Nearest
Barceloneta Municipio, 20 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3395 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 16 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 930,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 660,000× the energy of this one
  3. Around the size people start to feel M 3.0 59× the energy of this one
  4. This earthquake M 1.8 about 16 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 18.6278, -66.6496. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Barceloneta Municipio, PR 20 km (12 mi) NNW of here earthquakes near Barceloneta Municipio
Arecibo Municipio, PR 22 km (13 mi) N of here earthquakes near Arecibo Municipio
Hatillo Municipio, PR 26 km (16 mi) NE of here earthquakes near Hatillo Municipio
Manatí Municipio, PR 26 km (16 mi) NW of here earthquakes near Manatí Municipio
Florida Municipio, PR 30 km (19 mi) NNW of here earthquakes near Florida Municipio
Camuy Municipio, PR 30 km (19 mi) NE of here earthquakes near Camuy Municipio

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

Aftershocks so far

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

  1. 2.6 14 km N of Quebradillas, Puerto Rico
  2. 2.9 2 km NNE of Franquez, Puerto Rico
  3. 2.9 5 km N of Carrizales, Puerto Rico
  4. 2.8 7 km N of Tierras Nuevas Poniente, Puerto Rico
  5. 2.7 12 km NNE of Arecibo, Puerto Rico
  6. 3.4 29 km N of Dorado, Puerto Rico
  7. 2.1 0 km SSW of Cayuco, Puerto Rico
  8. 3.0 12 km NNE of Isabela, Puerto Rico
  9. 2.8 17 km N of Carrizales, Puerto Rico
  10. 2.8 45 km N of Hatillo, Puerto Rico
  11. 2.7 15 km NNE of Hatillo, Puerto Rico
  12. 2.3 1 km S of Río Lajas, Puerto Rico
  13. 2.6 21 km NNE of Dorado, Puerto Rico
  14. 3.0 10 km NNW of Camuy, Puerto Rico
  15. 2.7 20 km N of Brenas, 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 4.0 on 2017-03-24 — it released about 1,900 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.