QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

0 km NNE of Ciales, Puerto Rico

· 22 km deep · released about 17 lb of TNT

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10 km30 km60 km120 km N Morovis Municipio 6 kmCiales Municipio 7 kmFlorida Municipio 11 kmManatí Municipio 12 kmOrocovis Municipio 14 kmVega Baja Municipio 15 kmCorozal Municipio 15 kmBarceloneta Municipio 17 kmVega Alta Municipio 18 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
22 km below the surface
Felt
no reports yet
Nearest
Morovis Municipio, 6 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3417 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 17 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 5.8 870,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 620,000× the energy of this one
  3. Around the size people start to feel M 3.0 55× the energy of this one
  4. This earthquake M 1.8 about 17 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 18.3385, -66.4680. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Morovis Municipio, PR 6 km (3 mi) WNW of here earthquakes near Morovis Municipio
Ciales Municipio, PR 7 km (4 mi) NE of here earthquakes near Ciales Municipio
Florida Municipio, PR 11 km (7 mi) ESE of here earthquakes near Florida Municipio
Manatí Municipio, PR 12 km (8 mi) SSE of here earthquakes near Manatí Municipio
Orocovis Municipio, PR 14 km (9 mi) NNW of here earthquakes near Orocovis Municipio
Vega Baja Municipio, PR 15 km (9 mi) SSW of here earthquakes near Vega Baja 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. 2.1 0 km SSW of Cayuco, Puerto Rico
  2. 2.1 4 km SSE of Cayey, Puerto Rico
  3. 2.8 17 km N of Carrizales, Puerto Rico
  4. 3.1 1 km NW of Bayamón, Puerto Rico
  5. 2.3 10 km S of Lares, Puerto Rico
  6. 2.7 15 km NNE of Hatillo, Puerto Rico
  7. 2.3 1 km S of Río Lajas, Puerto Rico
  8. 2.5 10 km WSW of Adjuntas, Puerto Rico
  9. 2.6 21 km NNE of Dorado, Puerto Rico
  10. 3.1 5 km ESE of Cataño, Puerto Rico
  11. 2.9 3 km N of Trujillo Alto, Puerto Rico
  12. 1.7 7 km ESE of Las Marías, Puerto Rico
  13. 2.1 9 km ESE of Adjuntas, Puerto Rico
  14. 2.7 20 km N of Brenas, Puerto Rico
  15. 2.2 26 km N of Arecibo, 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.