QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

Puerto Rico region

· 23 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Corozal Municipio 3 kmNaranjito Municipio 6 kmBarranquitas Municipio 9 kmComerío Municipio 11 kmToa Alta Municipio 11 kmMorovis Municipio 13 kmOrocovis Municipio 15 kmBayamón Municipio 16 kmAibonito Municipio 17 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
23 km below the surface
Felt
no reports yet
Nearest
Corozal Municipio, 3 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2508 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 15 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 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 730,000× the energy of this one
  3. Around the size people start to feel M 3.0 65× the energy of this one
  4. This earthquake M 1.8 about 15 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 18.2816, -66.3068. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Corozal Municipio, PR 3 km (2 mi) SE of here earthquakes near Corozal Municipio
Naranjito Municipio, PR 6 km (4 mi) W of here earthquakes near Naranjito Municipio
Barranquitas Municipio, PR 9 km (6 mi) N of here earthquakes near Barranquitas Municipio
Comerío Municipio, PR 11 km (7 mi) NW of here earthquakes near Comerío Municipio
Toa Alta Municipio, PR 11 km (7 mi) SW of here earthquakes near Toa Alta Municipio
Morovis Municipio, PR 13 km (8 mi) ESE of here earthquakes near Morovis Municipio

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

Aftershocks so far

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

  1. 2.5 1 km SW of Bairoa, Puerto Rico
  2. 2.0 2 km WSW of Vázquez, Puerto Rico
  3. 3.1 0 km ESE of Río Lajas, Puerto Rico
  4. 2.3 9 km SSW of Central Aguirre, Puerto Rico
  5. 2.3 5 km S of Potala Pastillo, Puerto Rico
  6. 2.3 4 km SSW of Potala Pastillo, Puerto Rico
  7. 2.6 17 km N of Brenas, Puerto Rico
  8. 1.8 5 km SE of Jauca, Puerto Rico
  9. 2.6 4 km SSW of Las Ochenta, Puerto Rico
  10. 2.0 6 km SSW of Salinas, Puerto Rico
  11. 2.7 12 km NNE of Dorado, Puerto Rico
  12. 1.7 4 km SSE of Arroyo, Puerto Rico
  13. 2.4 4 km ENE of Jayuya, Puerto Rico
  14. 2.4 1 km WSW of Coco, Puerto Rico
  15. 2.3 3 km NNE of La Plena, 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 2019-03-12 — it released about 16,000 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.