QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

Earthquake near Bayamón, PR

No earthquake was likely felt in Bayamón in the 24 hours to 3:33 pm AST (19:33 UTC). The last one was M 4.8, 98 km (61 mi) WSW, at 9:19 am AST on 18 September 2026, estimated intensity III (weak) in town; 86 felt reports to USGS. Every earthquake near Bayamón

This page: a magnitude 2.3 earthquake was recorded 11 km (7 mi) southwest of Bayamón, PR, at 6:22 am AST on 27 September 2023 (10:22 UTC), 18 km deep.

USGS: Puerto Rico region

9 km (6 mi) SW of Bayamón, PR

6:22 am AST, Sep 27, 2023 · · 18 km deep · released about 91 lb of TNT

Every earthquake near Bayamón Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Naranjito Municipio 5 kmToa Alta Municipio 5 kmBayamón Municipio 7 kmCorozal Municipio 11 kmComerío Municipio 11 kmGuaynabo Municipio 12 kmAguas Buenas Municipio 13 kmToa Baja Municipio 15 kmCataño Municipio 16 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
6:22 am AST on 27 September 2023 ()
Where
11 km (7 mi) southwest of Bayamón, PR · earthquakes near Bayamón
Magnitude
M 2.3 (md)
Depth
18 km below the surface
Felt
no reports yet
Nearest
Naranjito Municipio, 5 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1141 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 Bayamón, 11 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: Naranjito, Pájaros, Galateo, H. Rivera Colon, Mucarabones, Toa Alta.

How big was it?

This earthquake released about 91 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 170,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 120,000× the energy of this one
  3. Around the size people start to feel M 3.0 10× the energy of this one
  4. This earthquake M 2.3 about 91 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 in our catalogue was M 4.6 on 2019-03-12 — about 2,600 times the energy of this one.

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 18.3233, -66.2262. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Naranjito Municipio, PR 5 km (3 mi) SW earthquakes near Naranjito Municipio
Toa Alta Municipio, PR 5 km (3 mi) NNW earthquakes near Toa Alta Municipio
Bayamón Municipio, PR 7 km (4 mi) ENE earthquakes near Bayamón Municipio
Corozal Municipio, PR 11 km (7 mi) WSW earthquakes near Corozal Municipio
Comerío Municipio, PR 11 km (7 mi) S earthquakes near Comerío Municipio
Guaynabo Municipio, PR 12 km (7 mi) E earthquakes near Guaynabo Municipio

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

Aftershocks so far

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

  1. 2.3 5 km SSE of Jobos, Puerto Rico
  2. 2.1 7 km SSE of Jobos, Puerto Rico
  3. 2.8 8 km SSE of Jobos, Puerto Rico
  4. 3.2 4 km SSE of Salinas, Puerto Rico
  5. 1.9 7 km SSE of Salinas, Puerto Rico
  6. 3.1 4 km S of Salinas, Puerto Rico
  7. 3.5 3 km S of Salinas, Puerto Rico
  8. 2.3 8 km SSW of Orocovis, Puerto Rico
  9. 3.3 Puerto Rico region
  10. 3.0 Puerto Rico region
  11. 2.1 7 km NNW of Coamo, Puerto Rico
  12. 3.0 24 km NNW of Loíza, Puerto Rico
  13. 2.1 5 km SSE of Salinas, Puerto Rico
  14. 2.1 4 km SSE of Salinas, Puerto Rico
  15. 2.5 5 km SW of Central Aguirre, 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.