QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

3 km NE of San Germán, Puerto Rico

· 31 km deep · released about 18 lb of TNT

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10 km30 km60 km120 km N San Germán Municipio 1 kmSabana Grande Municipio 8 kmHormigueros Municipio 10 kmMaricao Municipio 12 kmLajas Municipio 14 kmLas Marías Municipio 15 kmYauco Municipio 18 kmCabo Rojo Municipio 20 kmGuánica 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
31 km below the surface
Felt
no reports yet
Nearest
San Germán Municipio, 1 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2617 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 18 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 5.8 840,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 600,000× the energy of this one
  3. Around the size people start to feel M 3.0 53× the energy of this one
  4. This earthquake M 1.9 about 18 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 18.1035, -67.0250. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Germán Municipio, PR 1 km (1 mi) ESE of here earthquakes near San Germán Municipio
Sabana Grande Municipio, PR 8 km (5 mi) WNW of here earthquakes near Sabana Grande Municipio
Hormigueros Municipio, PR 10 km (6 mi) ESE of here earthquakes near Hormigueros Municipio
Maricao Municipio, PR 12 km (8 mi) SW of here earthquakes near Maricao Municipio
Lajas Municipio, PR 14 km (9 mi) N of here earthquakes near Lajas Municipio
Las Marías Municipio, PR 15 km (9 mi) SSW of here earthquakes near Las Marías Municipio

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

Aftershocks so far

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

  1. 1.9 1 km ENE of La Playa, Puerto Rico
  2. 1.8 2 km WNW of Guayanilla, Puerto Rico
  3. 1.8 7 km SW of Jayuya, Puerto Rico
  4. 1.6 3 km SW of Puerto Real, Puerto Rico
  5. 2.5 4 km E of Mayagüez, Puerto Rico
  6. 3.0 18 km WNW of Puerto Real, Puerto Rico
  7. 1.9 11 km S of Pole Ojea, Puerto Rico
  8. 1.9 Puerto Rico region
  9. 2.2 8 km WSW of Mayagüez, Puerto Rico
  10. 1.9 Puerto Rico region
  11. 2.7 29 km WSW of Stella, Puerto Rico
  12. 2.4 Puerto Rico region
  13. 1.8 30 km S of Guánica, Puerto Rico
  14. 1.5 9 km WNW of Puerto Real, Puerto Rico
  15. 2.2 23 km WNW of Puerto Real, 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.