QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8Md

7 km NNE of Sabana Grande, Puerto Rico

· 19 km deep · released about 15 lb of TNT

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10 km30 km60 km120 km N Maricao Municipio 5 kmSabana Grande Municipio 6 kmYauco Municipio 9 kmLas Marías Municipio 12 kmSan Germán Municipio 12 kmLares Municipio 17 kmAdjuntas Municipio 19 kmGuayanilla Municipio 20 kmHormigueros 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 1.8 (Md)
Depth
19 km below the surface
Felt
no reports yet
Nearest
Maricao Municipio, 5 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3599 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 15 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 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 710,000× the energy of this one
  3. Around the size people start to feel M 3.0 63× the energy of this one
  4. This earthquake M 1.8 about 15 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 18.1324, -66.9260. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Maricao Municipio, PR 5 km (3 mi) SSE of here earthquakes near Maricao Municipio
Sabana Grande Municipio, PR 6 km (4 mi) NNE of here earthquakes near Sabana Grande Municipio
Yauco Municipio, PR 9 km (6 mi) NW of here earthquakes near Yauco Municipio
Las Marías Municipio, PR 12 km (7 mi) SSE of here earthquakes near Las Marías Municipio
San Germán Municipio, PR 12 km (8 mi) ENE of here earthquakes near San Germán Municipio
Lares Municipio, PR 17 km (11 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. 1.8 2 km E of Sabana Grande, Puerto Rico
  2. 2.3 8 km S of Indios, Puerto Rico
  3. 2.1 11 km WNW of Puerto Real, Puerto Rico
  4. 2.7 4 km N of Hatillo, Puerto Rico
  5. 2.1 3 km SE of Maricao, Puerto Rico
  6. 2.3 6 km W of La Parguera, Puerto Rico
  7. 2.0 8 km ESE of Pole Ojea, Puerto Rico
  8. 1.9 5 km N of San Germán, Puerto Rico
  9. 2.1 5 km SSW of Maricao, Puerto Rico
  10. 2.9 2 km SSW of Stella, Puerto Rico
  11. 2.6 11 km NW of Puerto Real, Puerto Rico
  12. 2.1 14 km WNW of Puerto Real, Puerto Rico
  13. 2.4 12 km NW of Puerto Real, Puerto Rico
  14. 1.7 1 km NNE of Puerto Real, Puerto Rico
  15. 2.3 9 km S 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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