QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

10 km WSW of Mayagüez, Puerto Rico

· 14 km deep · released about 13 lb of TNT

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10 km30 km60 km120 km N Hormigueros Municipio 13 kmAñasco Municipio 17 kmRincón Municipio 18 kmCabo Rojo Municipio 21 kmSan Germán Municipio 22 kmAguada Municipio 23 kmLas Marías Municipio 28 kmMoca Municipio 28 kmLajas Municipio 30 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
Hormigueros Municipio, 13 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3413 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 13 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 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 840,000× the energy of this one
  3. Around the size people start to feel M 3.0 75× the energy of this one
  4. This earthquake M 1.8 about 13 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 18.1746, -67.2366. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hormigueros Municipio, PR 13 km (8 mi) WNW of here earthquakes near Hormigueros Municipio
Añasco Municipio, PR 17 km (10 mi) SW of here earthquakes near Añasco Municipio
Rincón Municipio, PR 18 km (11 mi) S of here earthquakes near Rincón Municipio
Cabo Rojo Municipio, PR 21 km (13 mi) NNW of here earthquakes near Cabo Rojo Municipio
San Germán Municipio, PR 22 km (14 mi) WNW of here earthquakes near San Germán Municipio
Aguada Municipio, PR 23 km (14 mi) SSW of here earthquakes near Aguada Municipio

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

Aftershocks so far

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

  1. 1.6 2 km S of Cabo Rojo, Puerto Rico
  2. 2.0 0 km NW of Liborio Negron Torres, Puerto Rico
  3. 2.3 31 km WSW of Stella, Puerto Rico
  4. 2.1 14 km S of Pole Ojea, Puerto Rico
  5. 2.1 3 km SSE of Pole Ojea, Puerto Rico
  6. 2.4 32 km WSW of Stella, Puerto Rico
  7. 2.6 8 km WNW of Puerto Real, Puerto Rico
  8. 2.5 6 km W of Hormigueros, Puerto Rico
  9. 2.2 9 km SW of Guánica, Puerto Rico
  10. 2.2 11 km SW of Guánica, Puerto Rico
  11. 2.2 4 km ENE of Mayagüez, Puerto Rico
  12. 1.8 Puerto Rico region
  13. 2.2 13 km W of Rincón, Puerto Rico
  14. 1.5 3 km S of Palmarejo, Puerto Rico
  15. 2.1 Mona Passage

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.