QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

8 km SSW of Ciales, Puerto Rico

· 28 km deep · released about 15 lb of TNT

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10 km30 km60 km120 km N Ciales Municipio 4 kmOrocovis Municipio 9 kmJayuya Municipio 11 kmMorovis Municipio 11 kmFlorida Municipio 13 kmVillalba Municipio 15 kmCorozal Municipio 19 kmManatí Municipio 20 kmUtuado 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
28 km below the surface
Felt
no reports yet
Nearest
Ciales Municipio, 4 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2799 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 18.2638, -66.5040. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Ciales Municipio, PR 4 km (2 mi) SSE of here earthquakes near Ciales Municipio
Orocovis Municipio, PR 9 km (5 mi) NW of here earthquakes near Orocovis Municipio
Jayuya Municipio, PR 11 km (7 mi) NE of here earthquakes near Jayuya Municipio
Morovis Municipio, PR 11 km (7 mi) SW of here earthquakes near Morovis Municipio
Florida Municipio, PR 13 km (8 mi) SSE of here earthquakes near Florida Municipio
Villalba Municipio, PR 15 km (9 mi) NNW of here earthquakes near Villalba Municipio

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

Aftershocks so far

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

  1. 2.3 1 km NNW of Indios, Puerto Rico
  2. 2.2 2 km ESE of Las Marías, Puerto Rico
  3. 2.2 3 km ESE of Las Marías, Puerto Rico
  4. 1.7 2 km ESE of Las Marías, Puerto Rico
  5. 3.8 1 km ESE of Las Marías, Puerto Rico
  6. 1.9 4 km N of Palmarejo, Puerto Rico
  7. 2.4 7 km NNE of Hatillo, Puerto Rico
  8. 1.9 1 km ENE of El Ojo, Puerto Rico
  9. 1.7 Puerto Rico region
  10. 1.9 2 km E of Magas Arriba, Puerto Rico
  11. 2.0 2 km ESE of Magas Arriba, Puerto Rico
  12. 1.7 6 km SSE of Indios, Puerto Rico
  13. 2.6 10 km N of Hatillo, Puerto Rico
  14. 1.5 Puerto Rico region
  15. 2.0 0 km SSE of Playita Cortada, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.