QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

Earthquake near San Germán, PR

No earthquake was likely felt in San Germán in the 24 hours to 6:04 pm AST (22:04 UTC). The last one was M 2.1, 12 km (7 mi) SW, at 11:57 pm AST on 8 November 2026, estimated intensity II (weak) in town. Every earthquake near San Germán

This page: a magnitude 1.7 earthquake was recorded 4 km (2 mi) north-northeast of San Germán, PR, at 8:02 pm AST on 9 February 2019 (00:02 UTC), 26 km deep.

USGS: 3 km NNE of San Germán, Puerto Rico

15 km (10 mi) SE of Mayagüez, PR · 107 km (67 mi) WSW of San Juan, PR

8:02 pm AST, Feb 9, 2019 · · 26 km deep · released about 11 lb of TNT

Every earthquake near San Germán Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Germán Municipio 1 kmSabana Grande Municipio 9 kmHormigueros Municipio 9 kmMaricao Municipio 12 kmLas Marías Municipio 14 kmLajas Municipio 15 kmYauco Municipio 18 kmCabo Rojo Municipio 21 kmGuánica 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
8:02 pm AST on 9 February 2019 ()
Where
4 km (2 mi) north-northeast of San Germán, PR · earthquakes near San Germán
Magnitude
M 1.7 (md)
Depth
26 km below the surface
Felt
no reports yet
Nearest
San Germán Municipio, 1 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2832 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth it was probably too small to be felt, even directly above it. In San Germán, 4 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

Earthquakes near other towns within 30 km: Sabana Eneas, Lajas, Sabana Grande, Monte Grande, Maricao, Palmarejo.

How big was it?

This earthquake released about 11 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 1,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 930,000× the energy of this one
  3. Around the size people start to feel M 3.0 83× the energy of this one
  4. This earthquake M 1.7 about 11 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.

For this area

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record lists 4 earthquakes of M5 or more within 50 km:

  1. 6.3 6 km WNW of Aguadilla, Puerto Rico · 41 km NNW of this epicentre
  2. 5.8 4 km E of Moca, Puerto Rico · 32 km N of this epicentre
  3. 5.2 19 km SW of Stella, Puerto Rico · 37 km WNW of this epicentre
  4. 5.1 21 km SW of Stella, Puerto Rico · 37 km W of this epicentre

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 18.1128, -67.0296. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
San Germán Municipio, PR 1 km (1 mi) SW earthquakes near San Germán Municipio
Sabana Grande Municipio, PR 9 km (6 mi) ESE earthquakes near Sabana Grande Municipio
Hormigueros Municipio, PR 9 km (6 mi) WNW earthquakes near Hormigueros Municipio
Maricao Municipio, PR 12 km (7 mi) NE earthquakes near Maricao Municipio
Las Marías Municipio, PR 14 km (9 mi) NNE earthquakes near Las Marías Municipio
Lajas Municipio, PR 15 km (9 mi) S earthquakes near Lajas Municipio

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

Aftershocks so far

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

  1. 1.7 2 km SSW of Tallaboa Alta, Puerto Rico
  2. 2.1 3 km S of Las Marías, Puerto Rico
  3. 2.0 5 km SW of San Antonio, Puerto Rico
  4. 2.0 5 km NE of La Parguera, Puerto Rico
  5. 2.1 18 km SSW of Stella, Puerto Rico
  6. 2.8 15 km WSW of Stella, Puerto Rico
  7. 2.1 17 km S of Indios, Puerto Rico
  8. 2.2 20 km SSE of Indios, Puerto Rico
  9. 2.5 16 km S of Indios, Puerto Rico
  10. 2.5 Puerto Rico region
  11. 2.7 0 km NW of Maricao, Puerto Rico
  12. 1.9 1 km SE of Maricao, Puerto Rico
  13. 2.5 0 km WSW of Maricao, Puerto Rico
  14. 2.1 8 km WNW of San Antonio, Puerto Rico
  15. 2.0 5 km NNE of Ponce, 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.