QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

2 km ENE of Parcelas Nuevas, Puerto Rico

· 15 km deep · released about 530 lb of TNT

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10 km30 km60 km120 km N Cidra Municipio 3 kmCayey Municipio 5 kmComerío Municipio 11 kmAguas Buenas Municipio 12 kmAibonito Municipio 12 kmCaguas Municipio 12 kmBarranquitas Municipio 18 kmSan Lorenzo Municipio 18 kmNaranjito Municipio 19 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
Magnitude
M 2.8 (md)
Depth
15 km below the surface
Felt
2 reports · strongest reported intensity IV
Nearest
Cidra Municipio, 3 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 400 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 530 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 29,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 20,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.8× the energy of this one
  4. This earthquake M 2.8 about 530 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.

Where

Epicentre 18.1490, -66.1495. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cidra Municipio, PR 3 km (2 mi) SSE of here earthquakes near Cidra Municipio
Cayey Municipio, PR 5 km (3 mi) N of here earthquakes near Cayey Municipio
Comerío Municipio, PR 11 km (7 mi) SE of here earthquakes near Comerío Municipio
Aguas Buenas Municipio, PR 12 km (8 mi) S of here earthquakes near Aguas Buenas Municipio
Aibonito Municipio, PR 12 km (8 mi) E of here earthquakes near Aibonito Municipio
Caguas Municipio, PR 12 km (8 mi) WSW of here earthquakes near Caguas Municipio

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

Aftershocks so far

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

  1. 1.8 2 km NNW of La Plena, Puerto Rico
  2. 2.8 4 km SSE of Cayey, Puerto Rico
  3. 2.3 6 km ENE of Naranjito, Puerto Rico
  4. 1.8 1 km WSW of G. L. Garcia, Puerto Rico
  5. 2.7 1 km E of Palmas, Puerto Rico
  6. 3.2 2 km SW of G. L. Garcia, Puerto Rico
  7. 2.9 4 km NW of Coamo, Puerto Rico
  8. 2.5 5 km N of Coamo, Puerto Rico
  9. 2.8 1 km SE of Jauca, Puerto Rico
  10. 2.1 8 km ESE of Comunas, Puerto Rico
  11. 3.3 4 km WNW of Trujillo Alto, Puerto Rico
  12. 2.8 13 km SSE of Emajagua, Puerto Rico
  13. 3.3 3 km SE of Naranjito, Puerto Rico
  14. 2.3 2 km S of Humacao, Puerto Rico
  15. 2.1 6 km SW of Capitanejo, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.6 on 2016-12-05 — it released about 450 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.