QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

Earthquake near Potala Pastillo, PR

No earthquake was likely felt in Potala Pastillo in the 24 hours to 10:17 am AST (14:17 UTC). The last one was M 2.2, 6 km (4 mi) NW, at 10:09 am AST on 7 November 2026, estimated intensity II (weak) in town. Every earthquake near Potala Pastillo

This page: a magnitude 3.3 earthquake was recorded 5 km (3 mi) south-southwest of Potala Pastillo, PR, at 3:23 am AST on 30 September 2022 (07:23 UTC), 12 km deep.

USGS: 5 km SSW of Potala Pastillo, Puerto Rico

13 km (8 mi) ESE of Ponce, PR

3:23 am AST, Sep 30, 2022 · · 12 km deep · released about 1.1 tons of TNT

10 km30 km60 km120 km N Juana Díaz Municipio 6 kmPonce Municipio 12 kmSanta Isabel Municipio 13 kmVillalba Municipio 21 kmCoamo Municipio 24 kmPeñuelas Municipio 24 kmSalinas Municipio 27 kmJayuya Municipio 30 kmGuayanilla Municipio 31 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
3:23 am AST on 30 September 2022 ()
Where
5 km (3 mi) south-southwest of Potala Pastillo, PR · earthquakes near Potala Pastillo
Magnitude
M 3.3 (md)
Depth
12 km below the surface
Felt
no reports yet
Nearest
Juana Díaz Municipio, 6 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1503 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 48 km (30 mi) from the epicentre. In Potala Pastillo, 5 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: Río Cañas Abajo 11 km, intensity III · Santa Isabel 12 km, intensity III · Ponce 14 km, intensity III · Tallaboa 22 km, intensity II · Coamo 22 km, intensity II · Tallaboa Alta 23 km, intensity II · Magas Arriba 28 km, intensity II · Guayanilla 31 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 1.1 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 150,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 6,700× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,700× the energy of this one
  4. This earthquake M 3.3 about 1.1 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.4× 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 53,000 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 17.9465, -66.5133. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Juana Díaz Municipio, PR 6 km (4 mi) NNE earthquakes near Juana Díaz Municipio
Ponce Municipio, PR 12 km (7 mi) WNW earthquakes near Ponce Municipio
Santa Isabel Municipio, PR 13 km (8 mi) E earthquakes near Santa Isabel Municipio
Villalba Municipio, PR 21 km (13 mi) NNE earthquakes near Villalba Municipio
Coamo Municipio, PR 24 km (15 mi) NE earthquakes near Coamo Municipio
Peñuelas Municipio, PR 24 km (15 mi) WNW earthquakes near Peñuelas Municipio

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

Aftershocks so far

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

  1. 1.9 4 km SE of Maria Antonia, Puerto Rico
  2. 3.0 5 km SW of Central Aguirre, Puerto Rico
  3. 2.6 0 km NNE of Guánica, Puerto Rico
  4. 2.8 3 km SSW of Tallaboa, Puerto Rico
  5. 3.3 5 km SW of Central Aguirre, Puerto Rico
  6. 2.1 5 km SE of Indios, Puerto Rico
  7. 3.0 5 km SW of Central Aguirre, Puerto Rico
  8. 2.3 4 km WSW of Ponce, Puerto Rico
  9. 2.1 5 km WSW of Guánica, Puerto Rico
  10. 2.2 0 km S of Guánica, Puerto Rico
  11. 1.8 2 km S of Indios, Puerto Rico
  12. 2.2 5 km S of Indios, Puerto Rico
  13. 2.6 5 km SW of Guánica, Puerto Rico
  14. 2.3 4 km WSW of Fuig, Puerto Rico
  15. 2.0 7 km WSW 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.