QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

3 km SSW of Maricao, Puerto Rico

· 17 km deep · released about 21 lb of TNT

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10 km30 km60 km120 km N Maricao Municipio 6 kmSan Germán Municipio 7 kmSabana Grande Municipio 8 kmLas Marías Municipio 9 kmHormigueros Municipio 14 kmYauco Municipio 15 kmLares Municipio 19 kmLajas Municipio 20 kmSan Sebastián 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 1.9 (md)
Depth
17 km below the surface
Felt
no reports yet
Nearest
Maricao Municipio, 6 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2561 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 21 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 730,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 520,000× the energy of this one
  3. Around the size people start to feel M 3.0 46× the energy of this one
  4. This earthquake M 1.9 about 21 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 18.1465, -66.9871. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Maricao Municipio, PR 6 km (4 mi) WSW of here earthquakes near Maricao Municipio
San Germán Municipio, PR 7 km (4 mi) NE of here earthquakes near San Germán Municipio
Sabana Grande Municipio, PR 8 km (5 mi) NNW of here earthquakes near Sabana Grande Municipio
Las Marías Municipio, PR 9 km (6 mi) S of here earthquakes near Las Marías Municipio
Hormigueros Municipio, PR 14 km (9 mi) E of here earthquakes near Hormigueros Municipio
Yauco Municipio, PR 15 km (9 mi) WNW of here earthquakes near Yauco 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. 1.8 7 km WNW of Puerto Real, Puerto Rico
  2. 2.0 12 km S of Ponce, Puerto Rico
  3. 2.3 7 km WSW of Guánica, Puerto Rico
  4. 1.6 3 km WSW of Fuig, Puerto Rico
  5. 2.0 20 km SSE of Indios, Puerto Rico
  6. 1.9 2 km SW of Adjuntas, Puerto Rico
  7. 1.7 13 km WSW of Pole Ojea, Puerto Rico
  8. 2.1 14 km SSE of Guánica, Puerto Rico
  9. 2.0 12 km SSE of Ponce, Puerto Rico
  10. 2.0 2 km NNE of Sabana Grande, Puerto Rico
  11. 1.8 4 km WNW of Hormigueros, Puerto Rico
  12. 2.0 12 km S of Ponce, Puerto Rico
  13. 2.6 4 km NNE of Isabela, Puerto Rico
  14. 1.6 6 km WSW of Guánica, Puerto Rico
  15. 1.6 12 km SSE of Ponce, 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 4,100 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.