QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

2 km SSE of San Germán, Puerto Rico

· 16 km deep · released about 10 lb of TNT

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10 km30 km60 km120 km N San Germán Municipio 5 kmSabana Grande Municipio 9 kmLajas Municipio 10 kmHormigueros Municipio 12 kmMaricao Municipio 16 kmCabo Rojo Municipio 17 kmGuánica Municipio 17 kmYauco Municipio 19 kmLas Marías Municipio 19 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 1.7 (md)
Depth
16 km below the surface
Felt
no reports yet
Nearest
San Germán Municipio, 5 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 628 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 10 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 95× the energy of this one
  4. This earthquake M 1.7 about 10 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 18.0638, -67.0332. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Germán Municipio, PR 5 km (3 mi) S of here earthquakes near San Germán Municipio
Sabana Grande Municipio, PR 9 km (6 mi) WSW of here earthquakes near Sabana Grande Municipio
Lajas Municipio, PR 10 km (6 mi) N of here earthquakes near Lajas Municipio
Hormigueros Municipio, PR 12 km (7 mi) SE of here earthquakes near Hormigueros Municipio
Maricao Municipio, PR 16 km (10 mi) SW of here earthquakes near Maricao Municipio
Cabo Rojo Municipio, PR 17 km (11 mi) ENE of here earthquakes near Cabo Rojo Municipio

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

Aftershocks so far

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

  1. 2.5 11 km SSE of Guánica, Puerto Rico
  2. 2.8 1 km S of Guánica, Puerto Rico
  3. 2.0 2 km SW of Indios, Puerto Rico
  4. 2.5 4 km WNW of La Parguera, Puerto Rico
  5. 2.2 2 km ESE of Magas Arriba, Puerto Rico
  6. 2.3 1 km WSW of Indios, Puerto Rico
  7. 2.2 11 km SSW of Guánica, Puerto Rico
  8. 2.3 3 km NE of Espino, Puerto Rico
  9. 2.4 9 km WSW of Adjuntas, Puerto Rico
  10. 2.5 1 km SW of Indios, Puerto Rico
  11. 2.3 3 km NE of Yauco, Puerto Rico
  12. 1.9 1 km ESE of Lluveras, Puerto Rico
  13. 1.9 1 km SSE of Yauco, Puerto Rico
  14. 2.0 1 km SSW of Santo Domingo, Puerto Rico
  15. 2.8 5 km SW of Tallaboa, 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 6.4 on 2020-01-07 — it released about 12,000,000 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.