QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

Earthquake near Mayagüez, PR

No earthquake was likely felt in Mayagüez in the 24 hours to 10:47 am AST (14:47 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 2.7 earthquake was recorded 46 km (28 mi) west-southwest of Mayagüez, PR, at 9:19 pm AST on 10 March 2018 (01:19 UTC), 134 km deep.

USGS: 39 km W of Puerto Real, Puerto Rico

99 km (62 mi) W of Ponce, PR · 46 km (28 mi) WSW of Mayagüez, PR

9:19 pm AST, Mar 10, 2018 · · 134 km deep · released about 360 lb of TNT

Every earthquake near Mayagüez Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mayagüez Municipio 35 kmCabo Rojo Municipio 42 kmRincón Municipio 42 kmHormigueros Municipio 47 kmAñasco Municipio 50 kmAguada Municipio 50 kmSan Germán Municipio 55 kmLajas Municipio 56 kmMoca Municipio 59 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
9:19 pm AST on 10 March 2018 ()
Where
46 km (28 mi) west-southwest of Mayagüez, PR · earthquakes near Mayagüez
Magnitude
M 2.7 (md)
Depth
134 km below the surface
Felt
no reports yet
Nearest
Mayagüez Municipio, 35 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3078 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, 46 km away, the estimate is intensity I (not felt). 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.

How big was it?

This earthquake released about 360 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 42,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 30,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.6× the energy of this one
  4. This earthquake M 2.7 about 360 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

The largest earthquake within 50 km since 2016 was M 4.4 on 2017-10-01 — about 330 times the energy of this one.

Before 2016, the USGS record lists 2 earthquakes of M5 or more within 50 km:

  1. 5.2 19 km SW of Stella, Puerto Rico · 22 km ENE of this epicentre
  2. 5.1 21 km SW of Stella, Puerto Rico · 21 km ENE 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 18.0981, -67.5590. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Mayagüez Municipio, PR 35 km (22 mi) W earthquakes near Mayagüez Municipio
Cabo Rojo Municipio, PR 42 km (26 mi) ESE earthquakes near Cabo Rojo Municipio
Rincón Municipio, PR 42 km (26 mi) NE earthquakes near Rincón Municipio
Hormigueros Municipio, PR 47 km (29 mi) E earthquakes near Hormigueros Municipio
Añasco Municipio, PR 50 km (31 mi) ENE earthquakes near Añasco Municipio
Aguada Municipio, PR 50 km (31 mi) NE earthquakes near Aguada Municipio

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

Aftershocks so far

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

  1. 2.7 40 km WSW of Pole Ojea, Puerto Rico
  2. 2.9 5 km WNW of Mayagüez, Puerto Rico
  3. 2.4 36 km WNW of Rincón, Puerto Rico
  4. 2.9 48 km WNW of Rincón, Puerto Rico
  5. 2.7 43 km WSW of Stella, Puerto Rico
  6. 2.5 67 km SE of Punta Cana, Dominican Republic
  7. 1.8 9 km S of Pole Ojea, Puerto Rico
  8. 1.8 6 km NW of Boquerón, Puerto Rico
  9. 1.7 4 km ESE of Boquerón, Puerto Rico
  10. 1.7 4 km SW of Palmarejo, Puerto Rico
  11. 2.4 1 km NNW of La Playa, Puerto Rico
  12. 2.2 29 km SW of Stella, Puerto Rico
  13. 2.5 22 km WNW of Rincón, Puerto Rico
  14. 1.5 17 km WNW of Puerto Real, Puerto Rico
  15. 1.8 2 km NE of Boquerón, 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.