QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

7 km NNW of Villalba, Puerto Rico

· 7.0 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Jayuya Municipio 7 kmVillalba Municipio 8 kmOrocovis Municipio 10 kmCiales Municipio 12 kmMorovis Municipio 19 kmCoamo Municipio 20 kmFlorida Municipio 21 kmUtuado Municipio 21 kmJuana Díaz Municipio 21 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
7.0 km below the surface
Felt
no reports yet
Nearest
Jayuya Municipio, 7 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2654 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 5.7 710,000× the energy of this one
  3. Around the size people start to feel M 3.0 63× 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 18.1851, -66.5265. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Jayuya Municipio, PR 7 km (4 mi) ESE of here earthquakes near Jayuya Municipio
Villalba Municipio, PR 8 km (5 mi) NW of here earthquakes near Villalba Municipio
Orocovis Municipio, PR 10 km (6 mi) WSW of here earthquakes near Orocovis Municipio
Ciales Municipio, PR 12 km (8 mi) S of here earthquakes near Ciales Municipio
Morovis Municipio, PR 19 km (12 mi) SW of here earthquakes near Morovis Municipio
Coamo Municipio, PR 20 km (12 mi) WNW of here earthquakes near Coamo Municipio

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

Aftershocks so far

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

  1. 1.9 6 km NW of Adjuntas, Puerto Rico
  2. 1.6 5 km NNE of Sabana Grande, Puerto Rico
  3. 2.4 5 km NNE of Sabana Grande, Puerto Rico
  4. 1.6 7 km ESE of Las Marías, Puerto Rico
  5. 1.6 6 km NNE of Ponce, Puerto Rico
  6. 1.5 6 km NE of Sabana Grande, Puerto Rico
  7. 1.9 6 km NNE of Sabana Grande, Puerto Rico
  8. 1.8 3 km WSW of Ponce, Puerto Rico
  9. 1.8 2 km SW of Río Cañas Abajo, Puerto Rico
  10. 1.6 14 km S of Salinas, Puerto Rico
  11. 1.7 0 km ENE of Jobos, Puerto Rico
  12. 1.9 1 km SW of Río Cañas Abajo, Puerto Rico
  13. 1.5 3 km N of Potala Pastillo, Puerto Rico
  14. 1.5 2 km WSW of Río Cañas Abajo, Puerto Rico
  15. 2.1 1 km WSW of Río Cañas Abajo, 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.