QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

Earthquake near Yauco, PR

Yes: an earthquake was likely felt in Yauco in the last 24 hours. M 2.1, 5 km (3 mi) S of Yauco, at 4:14 pm AST on 11 November 2026 (20:14 UTC); the estimated shaking in Yauco was intensity II (weak). Every earthquake near Yauco

This page: a magnitude 1.8 earthquake was recorded 6 km (4 mi) north-northwest of Yauco, PR, at 11:55 pm AST on 27 July 2017 (03:55 UTC), 8.0 km deep.

USGS: 6 km NNW of Yauco, Puerto Rico

28 km (17 mi) WNW of Ponce, PR

11:55 pm AST, Jul 27, 2017 · · 8.0 km deep · released about 13 lb of TNT

Every earthquake near Yauco Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Yauco Municipio 1 kmSabana Grande Municipio 8 kmMaricao Municipio 12 kmGuayanilla Municipio 12 kmAdjuntas Municipio 16 kmGuánica Municipio 16 kmPeñuelas Municipio 17 kmSan Germán Municipio 18 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
11:55 pm AST on 27 July 2017 ()
Where
6 km (4 mi) north-northwest of Yauco, PR · earthquakes near Yauco
Magnitude
M 1.8 (md)
Depth
8.0 km below the surface
Felt
no reports yet
Nearest
Yauco Municipio, 1 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3394 days ago

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

At this magnitude and depth, people at rest would likely notice it out to about 10 km (6 mi) from the epicentre. In Yauco, 6 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.

Likely felt in: Yauco 6 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 13 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 840,000× the energy of this one
  3. Around the size people start to feel M 3.0 75× the energy of this one
  4. This earthquake M 1.8 about 13 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 one earthquake of M5 or more within 50 km:

  1. 5.8 4 km E of Moca, Puerto Rico · 41 km NNW 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 18.0866, -66.8713. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Yauco Municipio, PR 1 km (1 mi) E earthquakes near Yauco Municipio
Sabana Grande Municipio, PR 8 km (5 mi) W earthquakes near Sabana Grande Municipio
Maricao Municipio, PR 12 km (7 mi) NW earthquakes near Maricao Municipio
Guayanilla Municipio, PR 12 km (7 mi) SE earthquakes near Guayanilla Municipio
Adjuntas Municipio, PR 16 km (10 mi) NE earthquakes near Adjuntas Municipio
Guánica Municipio, PR 16 km (10 mi) SSW earthquakes near Guánica Municipio

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

Aftershocks so far

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

  1. 2.2 4 km W of Las Marías, Puerto Rico
  2. 1.7 1 km SSW of Liborio Negron Torres, Puerto Rico
  3. 2.5 2 km SSW of Palmarejo, Puerto Rico
  4. 2.0 3 km WNW of Puerto Real, Puerto Rico
  5. 2.1 5 km SSW of Maricao, Puerto Rico
  6. 2.0 4 km SE of Pole Ojea, Puerto Rico
  7. 2.4 Puerto Rico region
  8. 2.1 5 km SSW of La Parguera, Puerto Rico
  9. 2.3 17 km S of Tallaboa, Puerto Rico
  10. 2.3 13 km SSW of Guánica, Puerto Rico
  11. 2.1 5 km WNW of Maricao, Puerto Rico
  12. 1.6 5 km W of Maricao, Puerto Rico
  13. 2.0 6 km NNE of Lluveras, Puerto Rico
  14. 1.7 3 km SSE of Monte Grande, Puerto Rico
  15. 1.8 4 km SSE of Maricao, 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.