QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9Md

4 km NE of San Germán, Puerto Rico

· 11 km deep · released about 21 lb of TNT

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10 km30 km60 km120 km N San Germán Municipio 3 kmSabana Grande Municipio 7 kmMaricao Municipio 11 kmHormigueros Municipio 11 kmLas Marías Municipio 13 kmLajas Municipio 15 kmYauco Municipio 16 kmGuánica Municipio 20 kmCabo Rojo Municipio 22 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
11 km below the surface
Felt
no reports yet
Nearest
San Germán Municipio, 3 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3547 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 5.8 710,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 500,000× the energy of this one
  3. Around the size people start to feel M 3.0 45× 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 18.1110, -67.0115. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Germán Municipio, PR 3 km (2 mi) E of here earthquakes near San Germán Municipio
Sabana Grande Municipio, PR 7 km (5 mi) WNW of here earthquakes near Sabana Grande Municipio
Maricao Municipio, PR 11 km (7 mi) SW of here earthquakes near Maricao Municipio
Hormigueros Municipio, PR 11 km (7 mi) ESE of here earthquakes near Hormigueros Municipio
Las Marías Municipio, PR 13 km (8 mi) SSW of here earthquakes near Las Marías Municipio
Lajas Municipio, PR 15 km (9 mi) NNE of here earthquakes near Lajas Municipio

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

Aftershocks so far

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

  1. 2.4 11 km WNW of Puerto Real, Puerto Rico
  2. 2.9 8 km N of Quebradillas, Puerto Rico
  3. 3.0 20 km WSW of Stella, Puerto Rico
  4. 2.2 15 km SSW of La Parguera, Puerto Rico
  5. 2.0 10 km ESE of Maricao, Puerto Rico
  6. 2.7 18 km S of Indios, Puerto Rico
  7. 2.2 0 km NNW of Cabo Rojo, Puerto Rico
  8. 2.7 20 km SSE of Indios, Puerto Rico
  9. 1.9 14 km SSE of Guánica, Puerto Rico
  10. 1.5 3 km SE of Palmarejo, Puerto Rico
  11. 2.5 13 km SW of La Playa, Puerto Rico
  12. 1.5 3 km SSE of Palmarejo, Puerto Rico
  13. 2.5 1 km E of La Parguera, Puerto Rico
  14. 2.3 13 km SSW of La Parguera, Puerto Rico
  15. 2.0 14 km SSW of La Parguera, 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.