QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1Md

3 km SE of Maricao, Puerto Rico

· 19 km deep · released about 43 lb of TNT

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10 km30 km60 km120 km N Maricao Municipio 3 kmLas Marías Municipio 7 kmSabana Grande Municipio 9 kmSan Germán Municipio 11 kmYauco Municipio 14 kmLares Municipio 16 kmHormigueros Municipio 17 kmSan Sebastián Municipio 19 kmAdjuntas 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 2.1 (Md)
Depth
19 km below the surface
Felt
no reports yet
Nearest
Maricao Municipio, 3 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3573 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 43 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 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 18.1643, -66.9572. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Maricao Municipio, PR 3 km (2 mi) WSW of here earthquakes near Maricao Municipio
Las Marías Municipio, PR 7 km (5 mi) SSE of here earthquakes near Las Marías Municipio
Sabana Grande Municipio, PR 9 km (6 mi) N of here earthquakes near Sabana Grande Municipio
San Germán Municipio, PR 11 km (7 mi) NE of here earthquakes near San Germán Municipio
Yauco Municipio, PR 14 km (8 mi) NW of here earthquakes near Yauco Municipio
Lares Municipio, PR 16 km (10 mi) SW of here earthquakes near Lares 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. 2.9 19 km WNW of Puerto Real, Puerto Rico
  2. 1.6 6 km ESE of La Parguera, Puerto Rico
  3. 2.6 16 km WSW of Stella, Puerto Rico
  4. 1.7 3 km SE of Boquerón, Puerto Rico
  5. 1.9 3 km SSE of Palmarejo, Puerto Rico
  6. 2.1 1 km NNW of Pole Ojea, Puerto Rico
  7. 2.2 14 km SSW of Guánica, Puerto Rico
  8. 2.8 0 km ENE of Maricao, Puerto Rico
  9. 2.4 8 km WSW of Mayagüez, Puerto Rico
  10. 2.7 10 km NW of Puerto Real, Puerto Rico
  11. 2.7 14 km S of Tallaboa, Puerto Rico
  12. 2.9 5 km NE of Quebradillas, Puerto Rico
  13. 2.0 26 km S of La Parguera, Puerto Rico
  14. 2.0 7 km SE of Ponce, Puerto Rico
  15. 2.0 2 km NE of Yauco, 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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