QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

44 km N of San Juan, Puerto Rico

· 28 km deep · released about 360 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Toa Baja Municipio 47 kmDorado Municipio 47 kmCataño Municipio 48 kmSan Juan Municipio 50 kmLoíza Municipio 50 kmVega Alta Municipio 54 kmCarolina Municipio 54 kmVega Baja Municipio 56 kmToa Alta Municipio 58 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 2.7 (md)
Depth
28 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Toa Baja Municipio, 47 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2682 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

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.

Where

Epicentre 18.8695, -66.1001. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Toa Baja Municipio, PR 47 km (29 mi) NNE of here earthquakes near Toa Baja Municipio
Dorado Municipio, PR 47 km (29 mi) NNE of here earthquakes near Dorado Municipio
Cataño Municipio, PR 48 km (30 mi) N of here earthquakes near Cataño Municipio
San Juan Municipio, PR 50 km (31 mi) N of here earthquakes near San Juan Municipio
Loíza Municipio, PR 50 km (31 mi) NNW of here earthquakes near Loíza Municipio
Vega Alta Municipio, PR 54 km (34 mi) NNE of here earthquakes near Vega Alta Municipio

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

Aftershocks so far

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

  1. 2.3 66 km N of San Juan, Puerto Rico
  2. 2.6 46 km N of Brenas, Puerto Rico
  3. 2.3 58 km N of Brenas, Puerto Rico
  4. 2.3 39 km N of San Juan, Puerto Rico
  5. 2.8 60 km N of Brenas, Puerto Rico
  6. 2.3 55 km N of Brenas, Puerto Rico
  7. 2.6 10 km N of San Juan, Puerto Rico
  8. 1.9 37 km N of San Juan, Puerto Rico
  9. 2.8 43 km N of Suárez, Puerto Rico
  10. 2.1 69 km N of Tierras Nuevas Poniente, Puerto Rico
  11. 2.1 9 km NNW of Levittown, Puerto Rico
  12. 2.5 36 km NNE of Suárez, Puerto Rico
  13. 2.1 19 km N of Brenas, Puerto Rico
  14. 2.7 64 km N of San Juan, Puerto Rico
  15. 2.5 72 km N of Brenas, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.8 on 2017-08-18 — it released about 1,300 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.