QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

20 km SSE of Jauca, Puerto Rico

· 26 km deep · released about 570 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Santa Isabel Municipio 19 kmSalinas Municipio 21 kmGuayama Municipio 28 kmJuana Díaz Municipio 29 kmCoamo Municipio 35 kmArroyo Municipio 36 kmAibonito Municipio 38 kmPonce Municipio 38 kmCayey Municipio 39 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 2.9 (md)
Depth
26 km below the surface
Felt
no reports yet
Nearest
Santa Isabel Municipio, 19 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1948 days ago

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

How big was it?

This earthquake released about 570 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 27,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 19,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.7× the energy of this one
  4. This earthquake M 2.9 about 570 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 17.7916, -66.3200. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Santa Isabel Municipio, PR 19 km (12 mi) SSE of here earthquakes near Santa Isabel Municipio
Salinas Municipio, PR 21 km (13 mi) SSW of here earthquakes near Salinas Municipio
Guayama Municipio, PR 28 km (17 mi) SW of here earthquakes near Guayama Municipio
Juana Díaz Municipio, PR 29 km (18 mi) SE of here earthquakes near Juana Díaz Municipio
Coamo Municipio, PR 35 km (22 mi) S of here earthquakes near Coamo Municipio
Arroyo Municipio, PR 36 km (22 mi) SW of here earthquakes near Arroyo 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. 3.1 7 km SSW of Tallaboa, Puerto Rico
  2. 2.8 9 km S of Tallaboa, Puerto Rico
  3. 3.0 9 km SSW of Tallaboa, Puerto Rico
  4. 2.4 1 km N of Tallaboa, Puerto Rico
  5. 2.4 4 km ENE of Tallaboa, 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 5.6 on 2020-01-07 — it released about 13,000 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.