QuakeIndex

Earthquake · reviewed by a seismologist

M 3.6md

Earthquake near Indios, PR

No earthquake was likely felt in Indios in the 24 hours to 12:09 pm AST (16:09 UTC). The last one was M 2.0, 3 km (2 mi) SW, at 4:21 am AST on 10 November 2026, estimated intensity II (weak) in town. Every earthquake near Indios

This page: a magnitude 3.6 earthquake was recorded 7 km (5 mi) south of Indios, PR, at 3:07 am AST on 13 January 2020 (07:07 UTC), 8.0 km deep. 4 people have reported feeling it to USGS.

USGS: 7 km S of Indios, Puerto Rico

23 km (14 mi) WSW of Ponce, PR

3:07 am AST, Jan 13, 2020 · · 8.0 km deep · released about 4.5 tons of TNT

Every earthquake near Indios Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guayanilla Municipio 9 kmGuánica Municipio 10 kmPeñuelas Municipio 15 kmYauco Municipio 18 kmSabana Grande Municipio 21 kmLajas Municipio 23 kmPonce Municipio 25 kmAdjuntas Municipio 29 kmMaricao Municipio 29 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
3:07 am AST on 13 January 2020 ()
Where
7 km (5 mi) south of Indios, PR · earthquakes near Indios
Magnitude
M 3.6 (md)
Depth
8.0 km below the surface
Felt
4 reports · strongest reported intensity III
Nearest
Guayanilla Municipio, 9 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2414 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 72 km (45 mi) from the epicentre. In Indios, 7 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: Guayanilla 11 km, intensity III · Magas Arriba 12 km, intensity III · Yauco 12 km, intensity III · Tallaboa 14 km, intensity III · Tallaboa Alta 19 km, intensity III · Ponce 23 km, intensity III · Adjuntas 28 km, intensity III · San Germán 28 km, intensity III. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 4.5 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.7 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 38,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,700× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,200× the energy of this one
  4. This earthquake M 3.6 about 4.5 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 9.4× 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 13,000 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 17.9291, -66.8290. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Guayanilla Municipio, PR 9 km (6 mi) NNE earthquakes near Guayanilla Municipio
Guánica Municipio, PR 10 km (6 mi) WNW earthquakes near Guánica Municipio
Peñuelas Municipio, PR 15 km (9 mi) NE earthquakes near Peñuelas Municipio
Yauco Municipio, PR 18 km (11 mi) N earthquakes near Yauco Municipio
Sabana Grande Municipio, PR 21 km (13 mi) NW earthquakes near Sabana Grande Municipio
Lajas Municipio, PR 23 km (14 mi) WNW earthquakes near Lajas Municipio

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

Aftershocks so far

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

  1. 2.8 6 km SE of Maria Antonia, Puerto Rico
  2. 3.0 9 km SE of Maria Antonia, Puerto Rico
  3. 3.7 6 km SSW of Indios, Puerto Rico
  4. 3.2 16 km SSE of Guánica, Puerto Rico
  5. 2.8 4 km SSE of Maria Antonia, Puerto Rico
  6. 3.5 9 km SSE of Tallaboa, Puerto Rico
  7. 4.0 26 km S of Indios, Puerto Rico
  8. 2.6 0 km S of Indios, Puerto Rico
  9. 2.3 11 km SSW of Tallaboa, Puerto Rico
  10. 2.9 5 km SSW of Indios, Puerto Rico
  11. 3.3 8 km SE of Maria Antonia, Puerto Rico
  12. 2.2 2 km N of Guayanilla, Puerto Rico
  13. 2.6 17 km SSE of Guánica, Puerto Rico
  14. 2.3 2 km SSW of Indios, Puerto Rico
  15. 2.6 2 km WSW of Indios, 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.