QuakeIndex

Earthquake · reviewed by a seismologist

M 3.5md

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 3.5 earthquake was recorded in Indios, PR, at 5:59 pm AST on 23 October 2023 (21:59 UTC), 9.0 km deep. 1 person has reported feeling it to USGS.

USGS: 1 km SSE of Indios, Puerto Rico

20 km (12 mi) W of Ponce, PR

5:59 pm AST, Oct 23, 2023 · · 9.0 km deep · released about 2.4 tons of TNT

Every earthquake near Indios Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guayanilla Municipio 3 kmPeñuelas Municipio 10 kmGuánica Municipio 12 kmYauco Municipio 13 kmSabana Grande Municipio 18 kmPonce Municipio 22 kmAdjuntas Municipio 23 kmLajas Municipio 24 kmMaricao Municipio 25 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
5:59 pm AST on 23 October 2023 ()
Where
in Indios, PR · earthquakes near Indios
Magnitude
M 3.5 (md)
Depth
9.0 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Guayanilla Municipio, 3 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1043 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 61 km (38 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.

Likely felt in: Guayanilla 5 km, intensity III · Magas Arriba 6 km, intensity III · Yauco 7 km, intensity III · Tallaboa 10 km, intensity III · Tallaboa Alta 14 km, intensity III · Ponce 20 km, intensity III · Adjuntas 22 km, intensity III · San Germán 27 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 2.4 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.5 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 70,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 3,100× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,200× the energy of this one
  4. This earthquake M 3.5 about 2.4 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 5.1× more

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 25,000 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 17.9815, -66.8108. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Guayanilla Municipio, PR 3 km (2 mi) NNE earthquakes near Guayanilla Municipio
Peñuelas Municipio, PR 10 km (6 mi) ENE earthquakes near Peñuelas Municipio
Guánica Municipio, PR 12 km (8 mi) WSW earthquakes near Guánica Municipio
Yauco Municipio, PR 13 km (8 mi) NNW earthquakes near Yauco Municipio
Sabana Grande Municipio, PR 18 km (11 mi) NW earthquakes near Sabana Grande Municipio
Ponce Municipio, PR 22 km (13 mi) E earthquakes near Ponce Municipio

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

Aftershocks so far

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

  1. 2.0 2 km NNW of Palomas, Puerto Rico
  2. 2.6 2 km S of Indios, Puerto Rico
  3. 3.2 12 km SW of Santa Isabel, Puerto Rico
  4. 2.3 Puerto Rico region
  5. 2.3 6 km SSE of Guánica, Puerto Rico
  6. 3.0 7 km SSE of Maria Antonia, Puerto Rico
  7. 2.8 1 km SSE of Guayanilla, Puerto Rico
  8. 2.1 0 km SE of Palomas, Puerto Rico
  9. 3.0 Mona Passage
  10. 2.5 Puerto Rico region
  11. 2.1 11 km S of Guánica, Puerto Rico
  12. 2.6 2 km SW of Indios, Puerto Rico
  13. 2.2 1 km SE of Indios, Puerto Rico
  14. 2.3 2 km W of La Parguera, Puerto Rico
  15. 2.8 2 km SW of Fuig, 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.