QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

7 km WNW of Maricao, Puerto Rico

· 24 km deep · released about 9 lb of TNT

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10 km30 km60 km120 km N Las Marías Municipio 8 kmSan Germán Municipio 10 kmHormigueros Municipio 11 kmMaricao Municipio 12 kmAñasco Municipio 13 kmSabana Grande Municipio 16 kmSan Sebastián Municipio 17 kmMoca Municipio 20 kmLares 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 1.6 (md)
Depth
24 km below the surface
Felt
no reports yet
Nearest
Las Marías Municipio, 8 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3020 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 9 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,200,000× the energy of this one
  3. Around the size people start to feel M 3.0 110× the energy of this one
  4. This earthquake M 1.6 about 9 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 18.1991, -67.0435. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Las Marías Municipio, PR 8 km (5 mi) WSW of here earthquakes near Las Marías Municipio
San Germán Municipio, PR 10 km (6 mi) N of here earthquakes near San Germán Municipio
Hormigueros Municipio, PR 11 km (7 mi) NE of here earthquakes near Hormigueros Municipio
Maricao Municipio, PR 12 km (7 mi) WNW of here earthquakes near Maricao Municipio
Añasco Municipio, PR 13 km (8 mi) SE of here earthquakes near Añasco Municipio
Sabana Grande Municipio, PR 16 km (10 mi) NW of here earthquakes near Sabana Grande Municipio

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

Aftershocks so far

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

  1. 1.9 17 km SSE of Guánica, Puerto Rico
  2. 2.0 20 km SW of Stella, Puerto Rico
  3. 2.1 3 km E of Pole Ojea, Puerto Rico
  4. 1.8 19 km S of Guánica, Puerto Rico
  5. 2.7 6 km E of Espino, Puerto Rico
  6. 2.3 5 km WNW of Las Marías, Puerto Rico
  7. 2.3 5 km E of Espino, Puerto Rico
  8. 2.0 6 km ENE of Espino, Puerto Rico
  9. 1.9 8 km WSW of Puerto Real, Puerto Rico
  10. 1.9 12 km SSE of Maria Antonia, Puerto Rico
  11. 2.0 12 km NW of Puerto Real, Puerto Rico
  12. 2.3 33 km SW of Stella, Puerto Rico
  13. 2.1 1 km W of Puerto Real, Puerto Rico
  14. 2.5 19 km SW of Stella, Puerto Rico
  15. 2.5 22 km W 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.3 on 2017-10-14 — it released about 9,400 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.