QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

1 km SW of San Germán, Puerto Rico

· 16 km deep · released about 19 lb of TNT

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10 km30 km60 km120 km N San Germán Municipio 5 kmHormigueros Municipio 10 kmLajas Municipio 10 kmSabana Grande Municipio 12 kmCabo Rojo Municipio 15 kmMaricao Municipio 17 kmGuánica Municipio 19 kmLas Marías Municipio 20 kmYauco 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
16 km below the surface
Felt
no reports yet
Nearest
San Germán Municipio, 5 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2803 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 18.0681, -67.0560. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Germán Municipio, PR 5 km (3 mi) SSW of here earthquakes near San Germán Municipio
Hormigueros Municipio, PR 10 km (6 mi) SE of here earthquakes near Hormigueros Municipio
Lajas Municipio, PR 10 km (6 mi) N of here earthquakes near Lajas Municipio
Sabana Grande Municipio, PR 12 km (7 mi) W of here earthquakes near Sabana Grande Municipio
Cabo Rojo Municipio, PR 15 km (10 mi) ENE of here earthquakes near Cabo Rojo Municipio
Maricao Municipio, PR 17 km (11 mi) SW of here earthquakes near Maricao Municipio

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

Aftershocks so far

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

  1. 1.5 Puerto Rico region
  2. 2.5 2 km SSE of Boquerón, Puerto Rico
  3. 1.8 0 km SSE of Juncal, Puerto Rico
  4. 1.7 Mona Passage
  5. 2.0 3 km SE of Pole Ojea, Puerto Rico
  6. 1.9 4 km SSE of Pole Ojea, Puerto Rico
  7. 2.0 1 km NNE of Santo Domingo, Puerto Rico
  8. 1.8 4 km ESE of Pole Ojea, Puerto Rico
  9. 2.1 5 km SE of Boquerón, Puerto Rico
  10. 2.2 2 km ESE of Pole Ojea, Puerto Rico
  11. 1.6 2 km WSW of Liborio Negron Torres, Puerto Rico
  12. 2.0 3 km WSW of Tallaboa, Puerto Rico
  13. 2.6 5 km SW of Sabana Grande, Puerto Rico
  14. 2.0 1 km WSW of Indios, Puerto Rico
  15. 1.8 7 km S of Indios, 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.

On USGS

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