QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

2 km SW of San Antonio, Puerto Rico

· 48 km deep · released about 170 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Vega Alta Municipio 2 kmDorado Municipio 7 kmVega Baja Municipio 9 kmToa Alta Municipio 11 kmToa Baja Municipio 14 kmCorozal Municipio 15 kmMorovis Municipio 17 kmNaranjito Municipio 18 kmCataño Municipio 18 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 2.5 (md)
Depth
48 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Vega Alta Municipio, 2 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1530 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 170 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 89,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 63,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.6× the energy of this one
  4. This earthquake M 2.5 about 170 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 18.4357, -66.3195. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Vega Alta Municipio, PR 2 km (1 mi) E of here earthquakes near Vega Alta Municipio
Dorado Municipio, PR 7 km (5 mi) SW of here earthquakes near Dorado Municipio
Vega Baja Municipio, PR 9 km (5 mi) ESE of here earthquakes near Vega Baja Municipio
Toa Alta Municipio, PR 11 km (7 mi) NW of here earthquakes near Toa Alta Municipio
Toa Baja Municipio, PR 14 km (8 mi) W of here earthquakes near Toa Baja Municipio
Corozal Municipio, PR 15 km (9 mi) N of here earthquakes near Corozal Municipio

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

Aftershocks so far

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

  1. 3.5 1 km NNW of Trujillo Alto, Puerto Rico
  2. 2.6 5 km WNW of Jagual, Puerto Rico
  3. 2.4 6 km ESE of Villalba, Puerto Rico
  4. 3.7 2 km ESE of Tierras Nuevas Poniente, Puerto Rico
  5. 2.1 4 km SSE of Cayey, 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 4.4 on 2018-12-09 — it released about 710 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.