QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

Mona Passage

· 23 km deep · released about 47 lb of TNT

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10 km30 km60 km120 km N San Germán Municipio 6 kmLas Marías Municipio 9 kmMaricao Municipio 9 kmHormigueros Municipio 11 kmSabana Grande Municipio 11 kmAñasco Municipio 19 kmYauco Municipio 19 kmSan Sebastián Municipio 20 kmLajas Municipio 20 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 2.1 (md)
Depth
23 km below the surface
Felt
no reports yet
Nearest
San Germán Municipio, 6 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2950 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 47 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 320,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 230,000× the energy of this one
  3. Around the size people start to feel M 3.0 20× the energy of this one
  4. This earthquake M 2.1 about 47 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 18.1591, -67.0180. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Germán Municipio, PR 6 km (4 mi) NNE of here earthquakes near San Germán Municipio
Las Marías Municipio, PR 9 km (5 mi) SSW of here earthquakes near Las Marías Municipio
Maricao Municipio, PR 9 km (6 mi) W of here earthquakes near Maricao Municipio
Hormigueros Municipio, PR 11 km (7 mi) ENE of here earthquakes near Hormigueros Municipio
Sabana Grande Municipio, PR 11 km (7 mi) NW of here earthquakes near Sabana Grande Municipio
Añasco Municipio, PR 19 km (12 mi) SE of here earthquakes near Añasco 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. 2.0 15 km SSW of Guánica, Puerto Rico
  2. 1.5 9 km SSE of Tallaboa, Puerto Rico
  3. 1.7 10 km SSE of Tallaboa, Puerto Rico
  4. 1.9 6 km N of Ponce, Puerto Rico
  5. 1.9 6 km NW of Puerto Real, Puerto Rico
  6. 1.7 13 km WNW of Pole Ojea, Puerto Rico
  7. 1.7 8 km WSW of Puerto Real, Puerto Rico
  8. 2.1 9 km NW of Puerto Real, Puerto Rico
  9. 1.9 10 km WNW of Puerto Real, Puerto Rico
  10. 2.1 7 km WSW of Mayagüez, Puerto Rico
  11. 2.7 10 km NNW of Puerto Real, Puerto Rico
  12. 1.9 7 km E of Pole Ojea, Puerto Rico
  13. 1.9 2 km SE of Aguadilla, Puerto Rico
  14. 2.4 9 km NW of Puerto Real, Puerto Rico
  15. 2.2 9 km WNW of Pole Ojea, 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

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