QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6md

Earthquake near Mayagüez, PR

No earthquake was likely felt in Mayagüez in the 24 hours to 3:48 pm AST (19:48 UTC). The last one was M 2.9, 25 km (15 mi) SSE, at 3:17 am AST on 8 November 2026, estimated intensity II (weak) in town. Every earthquake near Mayagüez

This page: a magnitude 2.6 earthquake was recorded 4 km (3 mi) east-northeast of Mayagüez, PR, at 10:19 pm AST on 9 September 2017 (02:19 UTC), 79 km deep.

USGS: 4 km ENE of Mayagüez, Puerto Rico

in Mayagüez, PR · 112 km (70 mi) W of San Juan, PR

10:19 pm AST, Sep 9, 2017 · · 79 km deep · released about 280 lb of TNT

Every earthquake near Mayagüez Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Añasco Municipio 8 kmHormigueros Municipio 10 kmLas Marías Municipio 14 kmSan Germán Municipio 15 kmMoca Municipio 18 kmMaricao Municipio 19 kmSan Sebastián Municipio 19 kmAguada Municipio 19 kmRincón 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
10:19 pm AST on 9 September 2017 ()
Where
4 km (3 mi) east-northeast of Mayagüez, PR · earthquakes near Mayagüez
Magnitude
M 2.6 (md)
Depth
79 km below the surface
Felt
no reports yet
Nearest
Añasco Municipio, 8 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3350 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth it was probably too small to be felt, even directly above it. In Mayagüez, 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: Espino, Añasco, Las Marias, Hormigueros, La Playa, Maricao.

How big was it?

This earthquake released about 280 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 53,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 38,000× the energy of this one
  3. Around the size people start to feel M 3.0 3.3× the energy of this one
  4. This earthquake M 2.6 about 280 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 6 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.3 6 km WNW of Aguadilla, Puerto Rico · 27 km NNW of this epicentre
  2. 6.1 15 km WNW of San Antonio, Puerto Rico · 39 km NNW of this epicentre
  3. 6.1 18 km NNW of San Antonio, Puerto Rico · 47 km N of this epicentre
  4. 5.8 4 km E of Moca, Puerto Rico · 20 km N of this epicentre
  5. 5.2 19 km SW of Stella, Puerto Rico · 28 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 18.2203, -67.1073. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Añasco Municipio, PR 8 km (5 mi) NNW earthquakes near Añasco Municipio
Hormigueros Municipio, PR 10 km (6 mi) S earthquakes near Hormigueros Municipio
Las Marías Municipio, PR 14 km (9 mi) E earthquakes near Las Marías Municipio
San Germán Municipio, PR 15 km (9 mi) SSE earthquakes near San Germán Municipio
Moca Municipio, PR 18 km (11 mi) N earthquakes near Moca Municipio
Maricao Municipio, PR 19 km (12 mi) ESE earthquakes near Maricao Municipio

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

Aftershocks so far

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

  1. 1.9 8 km SSE of Pole Ojea, Puerto Rico
  2. 2.1 9 km S of Pole Ojea, Puerto Rico
  3. 2.3 22 km W of Puerto Real, Puerto Rico
  4. 3.1 4 km NNE of Hatillo, Puerto Rico
  5. 2.7 6 km SE of Espino, Puerto Rico
  6. 2.0 1 km WNW of Lluveras, Puerto Rico
  7. 2.1 5 km WSW of Rincón, Puerto Rico
  8. 2.2 7 km WSW of La Playa, Puerto Rico
  9. 2.7 12 km NW of San Antonio, Puerto Rico
  10. 3.0 16 km WSW of Stella, Puerto Rico
  11. 2.9 2 km NNW of Boquerón, Puerto Rico
  12. 2.1 0 km NNW of Hormigueros, Puerto Rico
  13. 2.6 27 km NNW of Rincón, Puerto Rico
  14. 1.6 7 km W of La Parguera, Puerto Rico
  15. 2.9 4 km WSW of Las Marías, 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.