QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

18 km SW of Stella, Puerto Rico

· 23 km deep · released about 16 lb of TNT

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10 km30 km60 km120 km N Rincón Municipio 20 kmAñasco Municipio 26 kmHormigueros Municipio 26 kmAguada Municipio 27 kmCabo Rojo Municipio 28 kmSan Germán Municipio 35 kmMoca Municipio 36 kmAguadilla Municipio 39 kmLas Marías Municipio 40 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
Rincón Municipio, 20 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2660 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 16 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 5.8 970,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 680,000× the energy of this one
  3. Around the size people start to feel M 3.0 61× the energy of this one
  4. This earthquake M 1.8 about 16 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 18.1906, -67.3525. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Rincón Municipio, PR 20 km (12 mi) SSW of here earthquakes near Rincón Municipio
Añasco Municipio, PR 26 km (16 mi) WSW of here earthquakes near Añasco Municipio
Hormigueros Municipio, PR 26 km (16 mi) WNW of here earthquakes near Hormigueros Municipio
Aguada Municipio, PR 27 km (17 mi) SW of here earthquakes near Aguada Municipio
Cabo Rojo Municipio, PR 28 km (17 mi) NW of here earthquakes near Cabo Rojo Municipio
San Germán Municipio, PR 35 km (21 mi) WNW of here earthquakes near San Germán Municipio

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

Aftershocks so far

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

  1. 2.0 8 km W of Maricao, Puerto Rico
  2. 2.0 8 km WSW of Guánica, Puerto Rico
  3. 1.9 41 km WSW of Pole Ojea, Puerto Rico
  4. 1.5 6 km NE of Sabana Grande, Puerto Rico
  5. 1.9 6 km NNE of Sabana Grande, Puerto Rico
  6. 1.5 5 km SE of Boquerón, Puerto Rico
  7. 1.8 6 km SW of Palmarejo, Puerto Rico
  8. 2.1 5 km ESE of Boquerón, Puerto Rico
  9. 1.7 2 km NNE of Monte Grande, Puerto Rico
  10. 2.3 32 km NW of Rincón, Puerto Rico
  11. 1.7 4 km W of Fuig, Puerto Rico
  12. 2.6 9 km WSW of Mayagüez, Puerto Rico
  13. 1.9 Mona Passage
  14. 2.0 20 km WNW of Puerto Real, Puerto Rico
  15. 2.3 15 km NW of Rincón, 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 4.3 on 2017-10-14 — it released about 5,400 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.