QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

Earthquake near Indios, PR

USGS: 5 km SSW of Indios, Puerto Rico

23 km (14 mi) WSW of Ponce, PR

12:47 am AST, Oct 4, 2026 · · 16 km deep · released about 20 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 9 kmPeñuelas Municipio 14 kmYauco Municipio 15 kmSabana Grande Municipio 19 kmLajas Municipio 22 kmPonce Municipio 25 kmAdjuntas Municipio 27 kmMaricao Municipio 27 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
12:47 am AST on 4 October 2026 ()
Where
5 km (3 mi) SSW of Indios, PR · earthquakes near Indios
Magnitude
M 1.9 (md)
Depth
16 km below the surface
Felt
no reports yet
Nearest
Guayanilla Municipio, 7 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2 hours ago

A magnitude 1.9 earthquake was recorded 5 km (3 mi) SSW of Indios, PR, at 12:47 am AST on 4 October 2026 (04:47 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

Earthquakes near other towns within 30 km: Maria Antonia, Guánica, Palomas, Guayanilla, Fuig, Yauco.

How big was it?

This earthquake released about 20 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 760,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 540,000× the energy of this one
  3. Around the size people start to feel M 3.0 48× the energy of this one
  4. This earthquake M 1.9 about 20 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 6,000,000 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 17.9505, -66.8350. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Guayanilla Municipio, PR 7 km (4 mi) NNE earthquakes near Guayanilla Municipio
Guánica Municipio, PR 9 km (6 mi) W earthquakes near Guánica Municipio
Peñuelas Municipio, PR 14 km (9 mi) NE earthquakes near Peñuelas Municipio
Yauco Municipio, PR 15 km (9 mi) N earthquakes near Yauco Municipio
Sabana Grande Municipio, PR 19 km (12 mi) NW earthquakes near Sabana Grande Municipio
Lajas Municipio, PR 22 km (14 mi) W earthquakes near Lajas Municipio

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

Aftershocks so far

1 earthquake has been recorded within 50 km since this one.

  1. 2.2 5 km SW of Guánica, 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.