QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

2 km NW of Maricao, Puerto Rico

· 33 km deep · released about 6.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Las Marías Municipio 3 kmMaricao Municipio 7 kmSan Germán Municipio 11 kmSabana Grande Municipio 14 kmSan Sebastián Municipio 15 kmHormigueros Municipio 15 kmLares Municipio 16 kmAñasco Municipio 17 kmYauco 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 1.6 (md)
Depth
33 km below the surface
Felt
no reports yet
Nearest
Las Marías Municipio, 3 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2554 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 6.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
  3. Around the size people start to feel M 3.0 150× the energy of this one
  4. This earthquake M 1.6 about 6.4 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 18.2016, -66.9951. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Las Marías Municipio, PR 3 km (2 mi) SSW of here earthquakes near Las Marías Municipio
Maricao Municipio, PR 7 km (4 mi) WNW of here earthquakes near Maricao Municipio
San Germán Municipio, PR 11 km (7 mi) NNE of here earthquakes near San Germán Municipio
Sabana Grande Municipio, PR 14 km (9 mi) NNW of here earthquakes near Sabana Grande Municipio
San Sebastián Municipio, PR 15 km (9 mi) S of here earthquakes near San Sebastián Municipio
Hormigueros Municipio, PR 15 km (9 mi) ENE of here earthquakes near Hormigueros Municipio

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

Aftershocks so far

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

  1. 1.7 1 km S of Liborio Negron Torres, Puerto Rico
  2. 1.9 4 km WNW of Fuig, Puerto Rico
  3. 2.0 10 km W of Adjuntas, Puerto Rico
  4. 1.9 11 km SSE of La Parguera, Puerto Rico
  5. 2.4 7 km ESE of Maricao, Puerto Rico
  6. 1.8 12 km N of Yauco, Puerto Rico
  7. 1.6 11 km SE of La Parguera, Puerto Rico
  8. 1.8 7 km WNW of Puerto Real, Puerto Rico
  9. 2.3 7 km WSW of Guánica, Puerto Rico
  10. 1.6 3 km WSW of Fuig, Puerto Rico
  11. 2.0 20 km SSE of Indios, Puerto Rico
  12. 1.9 2 km SW of Adjuntas, Puerto Rico
  13. 1.7 13 km WSW of Pole Ojea, Puerto Rico
  14. 2.1 14 km SSE of Guánica, Puerto Rico
  15. 2.0 2 km NNE of Sabana Grande, 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 2019-09-05 — it released about 13,000 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.