QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

52 km NNE of Vieques, Puerto Rico

Yes. A magnitude 2.8 earthquake was recorded 52 km NNE of Vieques, Puerto Rico, 66 km (41 mi) NE of San Juan, PR, at 11:13 am AST on 9 July 2026 (15:13 UTC), 11 km deep.

66 km (41 mi) NE of San Juan, PR

· 11 km deep · released about 450 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Loíza Municipio 55 kmFajardo Municipio 55 kmLuquillo Municipio 57 kmRío Grande Municipio 57 kmCarolina Municipio 61 kmCanóvanas Municipio 64 kmSan Juan Municipio 65 kmCataño Municipio 69 kmTrujillo Alto Municipio 69 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 2.8 (md)
Depth
11 km below the surface
Felt
no reports yet
Nearest
Loíza Municipio, 55 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 125 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, people at rest would likely notice it out to about 24 km (15 mi) from the epicentre. 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 450 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 34,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 24,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.1× the energy of this one
  4. This earthquake M 2.8 about 450 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 4.8 on 2021-03-09 — about 1,100 times the energy of this one.

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

  1. 5.1 92 km N of Suárez, Puerto Rico · 43 km N of this epicentre
  2. 5.0 73 km NNE of Vieques, Puerto Rico · 24 km NE 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 18.8760, -65.6817. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Loíza Municipio, PR 55 km (34 mi) SSW earthquakes near Loíza Municipio
Fajardo Municipio, PR 55 km (34 mi) S earthquakes near Fajardo Municipio
Luquillo Municipio, PR 57 km (35 mi) S earthquakes near Luquillo Municipio
Río Grande Municipio, PR 57 km (35 mi) SSW earthquakes near Río Grande Municipio
Carolina Municipio, PR 61 km (38 mi) SSW earthquakes near Carolina Municipio
Canóvanas Municipio, PR 64 km (40 mi) SSW earthquakes near Canóvanas Municipio

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

Aftershocks so far

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

  1. 3.1 53 km NNW of Culebra, Puerto Rico
  2. 3.7 69 km N of Culebra, Puerto Rico
  3. 2.9 75 km NNE of Vieques, Puerto Rico
  4. 3.1 33 km NNW of Culebra, Puerto Rico
  5. 3.1 62 km NNE of Luquillo, Puerto Rico
  6. 3.0 49 km N of Suárez, Puerto Rico
  7. 3.0 66 km N of San Juan, Puerto Rico
  8. 3.4 81 km NNE of Luquillo, Puerto Rico
  9. 3.0 34 km NNE of San Juan, Puerto Rico
  10. 2.9 41 km NNE of Luquillo, Puerto Rico
  11. 2.9 73 km N of Culebra, Puerto Rico
  12. 3.0 58 km N of Culebra, Puerto Rico
  13. 3.3 76 km NNE of Vieques, Puerto Rico
  14. 3.5 59 km N of Culebra, Puerto Rico
  15. 3.4 75 km N of San Juan, 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.