QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4md

Earthquake near Bayamón, PR

No earthquake was likely felt in Bayamón in the 24 hours to 12:26 am AST (04:26 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 2.4 earthquake was recorded 21 km (13 mi) southwest of Bayamón, PR, at 1:31 pm AST on 20 June 2023 (17:31 UTC), 19 km deep.

USGS: Puerto Rico region

29 km (18 mi) SW of San Juan, PR · 19 km (12 mi) SW of Bayamón, PR

1:31 pm AST, Jun 20, 2023 · · 19 km deep · released about 100 lb of TNT

Every earthquake near Bayamón Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Naranjito Municipio 5 kmBarranquitas Municipio 6 kmComerío Municipio 7 kmCorozal Municipio 8 kmToa Alta Municipio 13 kmAibonito Municipio 13 kmCidra Municipio 15 kmAguas Buenas Municipio 16 kmBayamón 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
1:31 pm AST on 20 June 2023 ()
Where
21 km (13 mi) southwest of Bayamón, PR · earthquakes near Bayamón
Magnitude
M 2.4 (md)
Depth
19 km below the surface
Felt
no reports yet
Nearest
Naranjito Municipio, 5 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1240 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 7 km (4 mi) from the epicentre. In Bayamón, 21 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, Comerío, Barranquitas, Corozal, H. Rivera Colon, Aibonito.

How big was it?

This earthquake released about 100 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 140,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 100,000× the energy of this one
  3. Around the size people start to feel M 3.0 9.1× the energy of this one
  4. This earthquake M 2.4 about 100 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 2,300 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 18.2505, -66.2807. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Naranjito Municipio, PR 5 km (3 mi) NNE earthquakes near Naranjito Municipio
Barranquitas Municipio, PR 6 km (4 mi) SSW earthquakes near Barranquitas Municipio
Comerío Municipio, PR 7 km (4 mi) ESE earthquakes near Comerío Municipio
Corozal Municipio, PR 8 km (5 mi) NW earthquakes near Corozal Municipio
Toa Alta Municipio, PR 13 km (8 mi) NNE earthquakes near Toa Alta Municipio
Aibonito Municipio, PR 13 km (8 mi) S earthquakes near Aibonito Municipio

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

Aftershocks so far

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

  1. 2.3 4 km SSE of Adjuntas, Puerto Rico
  2. 1.9 Puerto Rico region
  3. 2.4 1 km SSW of Adjuntas, Puerto Rico
  4. 2.3 1 km S of Adjuntas, Puerto Rico
  5. 3.3 8 km SSW of Potala Pastillo, Puerto Rico
  6. 2.8 2 km SSW of Adjuntas, Puerto Rico
  7. 3.6 0 km ENE of Pájaros, Puerto Rico
  8. 2.6 8 km SSW of Ciales, Puerto Rico
  9. 2.0 8 km ESE of Adjuntas, Puerto Rico
  10. 2.5 0 km NE of Capitanejo, Puerto Rico
  11. 2.8 5 km SSW of Capitanejo, Puerto Rico
  12. 2.9 8 km NNW of Coamo, Puerto Rico
  13. 3.0 1 km E of Jagual, Puerto Rico
  14. 2.4 8 km S of Orocovis, Puerto Rico
  15. 2.9 Puerto Rico region

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.