QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

Earthquake near Indios, PR

Yes: an earthquake was likely felt in Indios in the last 24 hours. M 2.1, 3 km (2 mi) W of Indios, at 4:14 pm AST on 11 November 2026 (20:14 UTC); the estimated shaking in Indios was intensity II (weak). Every earthquake near Indios

This page: a magnitude 3.0 earthquake was recorded 4 km (3 mi) southwest of Indios, PR, at 11:02 pm AST on 4 November 2021 (03:02 UTC), 17 km deep.

USGS: 4 km SW of Indios, Puerto Rico

24 km (15 mi) W of Ponce, PR

11:02 pm AST, Nov 4, 2021 · · 17 km deep · released about 950 lb of TNT

Every earthquake near Indios Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guayanilla Municipio 7 kmGuánica Municipio 8 kmYauco Municipio 13 kmPeñuelas Municipio 14 kmSabana Grande Municipio 17 kmLajas Municipio 20 kmMaricao Municipio 25 kmSan Germán Municipio 25 kmAdjuntas Municipio 26 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
11:02 pm AST on 4 November 2021 ()
Where
4 km (3 mi) southwest of Indios, PR · earthquakes near Indios
Magnitude
M 3.0 (md)
Depth
17 km below the surface
Felt
no reports yet
Nearest
Guayanilla Municipio, 7 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1833 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 33 km (21 mi) from the epicentre. In Indios, 4 km away, the estimate is intensity III (weak). 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.

Likely felt in: Yauco 7 km, intensity II · Guayanilla 8 km, intensity II · Magas Arriba 10 km, intensity II · Tallaboa 14 km, intensity II · Tallaboa Alta 18 km, intensity II · Ponce 24 km, intensity II · San Germán 24 km, intensity II · Adjuntas 25 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 950 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 350,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 16,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 11,000× the energy of this one
  4. This earthquake M 3.0 about 950 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 6.4 on 2020-01-07 — about 130,000 times the energy of this one.

Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.

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 17.9681, -66.8475. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Guayanilla Municipio, PR 7 km (4 mi) NE earthquakes near Guayanilla Municipio
Guánica Municipio, PR 8 km (5 mi) WSW earthquakes near Guánica Municipio
Yauco Municipio, PR 13 km (8 mi) N earthquakes near Yauco Municipio
Peñuelas Municipio, PR 14 km (9 mi) ENE earthquakes near Peñuelas Municipio
Sabana Grande Municipio, PR 17 km (10 mi) NW earthquakes near Sabana Grande Municipio
Lajas Municipio, PR 20 km (13 mi) W earthquakes near Lajas Municipio

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

Aftershocks so far

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

  1. 1.9 10 km SSE of Guánica, Puerto Rico
  2. 1.7 3 km N of Lluveras, Puerto Rico
  3. 3.4 4 km SW of Indios, Puerto Rico
  4. 2.6 10 km SSE of Guánica, Puerto Rico
  5. 2.4 1 km N of Magas Arriba, Puerto Rico
  6. 2.5 3 km S of Indios, Puerto Rico
  7. 1.8 11 km SSE of Guánica, Puerto Rico
  8. 3.0 11 km SSE of Maria Antonia, Puerto Rico
  9. 2.6 4 km SSE of La Parguera, Puerto Rico
  10. 2.6 6 km SSE of Maria Antonia, Puerto Rico
  11. 2.7 Puerto Rico region
  12. 2.3 2 km WNW of Indios, Puerto Rico
  13. 2.8 3 km S of Indios, Puerto Rico
  14. 2.3 2 km SW of Indios, Puerto Rico
  15. 2.5 6 km WSW of La Parguera, 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.