QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

Mona Passage

· 16 km deep · released about 19 lb of TNT

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10 km30 km60 km120 km N Hormigueros Municipio 9 kmAñasco Municipio 14 kmSan Germán Municipio 18 kmRincón Municipio 19 kmCabo Rojo Municipio 20 kmAguada Municipio 22 kmLas Marías Municipio 24 kmMoca Municipio 26 kmLajas Municipio 27 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
16 km below the surface
Felt
no reports yet
Nearest
Hormigueros Municipio, 9 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3047 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 19 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 5.8 810,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 580,000× the energy of this one
  3. Around the size people start to feel M 3.0 51× the energy of this one
  4. This earthquake M 1.9 about 19 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 18.1738, -67.1960. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hormigueros Municipio, PR 9 km (6 mi) WNW of here earthquakes near Hormigueros Municipio
Añasco Municipio, PR 14 km (9 mi) SSW of here earthquakes near Añasco Municipio
San Germán Municipio, PR 18 km (11 mi) WNW of here earthquakes near San Germán Municipio
Rincón Municipio, PR 19 km (12 mi) SSE of here earthquakes near Rincón Municipio
Cabo Rojo Municipio, PR 20 km (12 mi) N of here earthquakes near Cabo Rojo Municipio
Aguada Municipio, PR 22 km (14 mi) S of here earthquakes near Aguada Municipio

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

Aftershocks so far

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

  1. 1.8 4 km SSE of Cabo Rojo, Puerto Rico
  2. 1.9 4 km SE of Espino, Puerto Rico
  3. 2.7 3 km NE of Mayagüez, Puerto Rico
  4. 2.0 5 km SW of Las Marías, Puerto Rico
  5. 2.5 15 km WNW of Rincón, Puerto Rico
  6. 1.6 1 km SW of Adjuntas, Puerto Rico
  7. 1.8 6 km SW of Mayagüez, Puerto Rico
  8. 1.8 1 km SSW of Adjuntas, Puerto Rico
  9. 2.5 2 km S of Adjuntas, Puerto Rico
  10. 2.4 1 km SSW of Adjuntas, Puerto Rico
  11. 2.6 2 km SSW of Adjuntas, Puerto Rico
  12. 1.9 3 km NE of Hormigueros, Puerto Rico
  13. 2.1 1 km SSE of Lluveras, Puerto Rico
  14. 2.3 23 km NW of Rincón, Puerto Rico
  15. 2.4 3 km N of Lluveras, 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 4,600 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.