QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

4 km ESE of Maricao, Puerto Rico

· 17 km deep · released about 320 lb of TNT

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10 km30 km60 km120 km N Maricao Municipio 1 kmLas Marías Municipio 8 kmSabana Grande Municipio 9 kmSan Germán Municipio 12 kmYauco Municipio 13 kmLares Municipio 14 kmSan Sebastián Municipio 19 kmHormigueros Municipio 19 kmAdjuntas Municipio 19 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 2.7 (md)
Depth
17 km below the surface
Felt
no reports yet
Nearest
Maricao Municipio, 1 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 57 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 320 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 48,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 34,000× the energy of this one
  3. Around the size people start to feel M 3.0 3× the energy of this one
  4. This earthquake M 2.7 about 320 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 18.1660, -66.9412. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Maricao Municipio, PR 1 km (1 mi) SW of here earthquakes near Maricao Municipio
Las Marías Municipio, PR 8 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 12 km (7 mi) ENE of here earthquakes near San Germán Municipio
Yauco Municipio, PR 13 km (8 mi) NW of here earthquakes near Yauco Municipio
Lares Municipio, PR 14 km (9 mi) SSW of here earthquakes near Lares Municipio

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

Aftershocks so far

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

  1. 2.1 2 km NE of Magas Arriba, Puerto Rico
  2. 2.3 1 km S of La Parguera, Puerto Rico
  3. 2.3 2 km WSW of Tallaboa, Puerto Rico
  4. 2.2 12 km S of Lares, Puerto Rico
  5. 2.4 9 km WNW of Rincón, Puerto Rico
  6. 2.4 3 km S of Cabo Rojo, Puerto Rico
  7. 2.6 6 km WSW of Guánica, Puerto Rico
  8. 2.3 0 km WSW of Guánica, Puerto Rico
  9. 2.4 6 km WSW of Fuig, Puerto Rico
  10. 2.1 1 km NNW of Indios, Puerto Rico
  11. 2.0 1 km E of Magas Arriba, Puerto Rico
  12. 2.6 9 km W of Rincón, Puerto Rico
  13. 2.2 7 km SSW of Capitanejo, Puerto Rico
  14. 3.0 16 km WNW of Puerto Real, Puerto Rico
  15. 3.2 16 km WNW of Puerto Real, 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 6.4 on 2020-01-07 — it released about 380,000 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.