QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

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 1.8 earthquake was recorded 10 km (6 mi) south of Indios, PR, at 12:26 am AST on 29 December 2019 (04:26 UTC), 10 km deep.

USGS: 10 km S of Indios, Puerto Rico

25 km (15 mi) WSW of Ponce, PR

12:26 am AST, Dec 29, 2019 · · 10 km deep · released about 15 lb of TNT

Every earthquake near Indios Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guánica Municipio 11 kmGuayanilla Municipio 12 kmPeñuelas Municipio 18 kmYauco Municipio 21 kmLajas Municipio 24 kmSabana Grande Municipio 24 kmPonce Municipio 26 kmSan Germán Municipio 32 kmAdjuntas Municipio 32 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
12:26 am AST on 29 December 2019 ()
Where
10 km (6 mi) south of Indios, PR · earthquakes near Indios
Magnitude
M 1.8 (md)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Guánica Municipio, 11 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2509 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth, people at rest would likely notice it out to about 9 km (6 mi) from the epicentre. In Indios, 10 km away, the estimate is intensity II (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.

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

How big was it?

This earthquake released about 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 730,000× the energy of this one
  3. Around the size people start to feel M 3.0 65× the energy of this one
  4. This earthquake M 1.8 about 15 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 5.0 on 2019-12-29 — about 65,000 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 17.9011, -66.8316. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Guánica Municipio, PR 11 km (7 mi) WNW earthquakes near Guánica Municipio
Guayanilla Municipio, PR 12 km (8 mi) NNE earthquakes near Guayanilla Municipio
Peñuelas Municipio, PR 18 km (11 mi) NE earthquakes near Peñuelas Municipio
Yauco Municipio, PR 21 km (13 mi) N earthquakes near Yauco Municipio
Lajas Municipio, PR 24 km (15 mi) WNW earthquakes near Lajas Municipio
Sabana Grande Municipio, PR 24 km (15 mi) NNW earthquakes near Sabana Grande 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. 2.4 11 km SSE of Guánica, Puerto Rico
  2. 2.5 12 km SSE of Maria Antonia, Puerto Rico
  3. 2.7 8 km S of Indios, Puerto Rico
  4. 2.2 13 km SSE of Maria Antonia, Puerto Rico
  5. 2.2 10 km SSE of Maria Antonia, Puerto Rico
  6. 2.1 5 km SE of Maria Antonia, Puerto Rico
  7. 1.9 13 km SSE of Guánica, Puerto Rico
  8. 2.4 9 km SE of Maria Antonia, Puerto Rico
  9. 2.2 6 km NW of Puerto Real, Puerto Rico
  10. 1.6 5 km SSE of Guánica, Puerto Rico
  11. 1.8 10 km SE of Maria Antonia, Puerto Rico
  12. 2.5 13 km S of Indios, Puerto Rico
  13. 1.6 9 km SSE of Guánica, Puerto Rico
  14. 2.0 8 km S of Indios, Puerto Rico
  15. 2.5 11 km S 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.