QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

4 km ESE of San Germán, Puerto Rico

· 18 km deep · released about 20 lb of TNT

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10 km30 km60 km120 km N San Germán Municipio 6 kmSabana Grande Municipio 7 kmLajas Municipio 10 kmHormigueros Municipio 14 kmMaricao Municipio 15 kmGuánica Municipio 15 kmYauco Municipio 16 kmLas Marías Municipio 19 kmCabo Rojo 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 1.9 (md)
Depth
18 km below the surface
Felt
no reports yet
Nearest
San Germán Municipio, 6 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3245 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 20 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 5.8 760,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 540,000× the energy of this one
  3. Around the size people start to feel M 3.0 48× the energy of this one
  4. This earthquake M 1.9 about 20 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 18.0603, -67.0046. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Germán Municipio, PR 6 km (4 mi) SSE of here earthquakes near San Germán Municipio
Sabana Grande Municipio, PR 7 km (4 mi) WSW of here earthquakes near Sabana Grande Municipio
Lajas Municipio, PR 10 km (6 mi) NNE of here earthquakes near Lajas Municipio
Hormigueros Municipio, PR 14 km (9 mi) SE of here earthquakes near Hormigueros Municipio
Maricao Municipio, PR 15 km (9 mi) SSW of here earthquakes near Maricao Municipio
Guánica Municipio, PR 15 km (9 mi) NW of here earthquakes near Guánica Municipio

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

Aftershocks so far

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

  1. 1.9 6 km W of Stella, Puerto Rico
  2. 2.2 19 km SSE of Tallaboa, Puerto Rico
  3. 1.8 2 km ESE of Sabana Grande, Puerto Rico
  4. 2.6 24 km SSE of Pole Ojea, Puerto Rico
  5. 2.1 Mona Passage
  6. 1.8 4 km NE of La Parguera, Puerto Rico
  7. 2.0 9 km WSW of Mayagüez, Puerto Rico
  8. 2.1 10 km W of Puerto Real, Puerto Rico
  9. 1.9 4 km ENE of La Parguera, Puerto Rico
  10. 2.0 5 km ENE of La Parguera, Puerto Rico
  11. 1.8 2 km NNW of Palmarejo, Puerto Rico
  12. 2.5 16 km SW of Stella, Puerto Rico
  13. 1.9 Mona Passage
  14. 2.2 Puerto Rico region
  15. 2.6 Mona Passage

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

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.