QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

24 km NNW of Loíza, Puerto Rico

· 50 km deep · released about 1,000 lb of TNT

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10 km30 km60 km120 km N Loíza Municipio 22 kmCarolina Municipio 28 kmSan Juan Municipio 28 kmCataño Municipio 31 kmRío Grande Municipio 33 kmToa Baja Municipio 34 kmTrujillo Alto Municipio 35 kmCanóvanas Municipio 35 kmGuaynabo Municipio 38 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 3.0 (md)
Depth
50 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Loíza Municipio, 22 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1081 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 1,000 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 330,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 15,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 10,000× the energy of this one
  4. This earthquake M 3.0 about 1,000 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 18.6443, -65.9390. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Loíza Municipio, PR 22 km (14 mi) N of here earthquakes near Loíza Municipio
Carolina Municipio, PR 28 km (17 mi) N of here earthquakes near Carolina Municipio
San Juan Municipio, PR 28 km (18 mi) NNE of here earthquakes near San Juan Municipio
Cataño Municipio, PR 31 km (19 mi) NE of here earthquakes near Cataño Municipio
Río Grande Municipio, PR 33 km (21 mi) NNW of here earthquakes near Río Grande Municipio
Toa Baja Municipio, PR 34 km (21 mi) NE of here earthquakes near Toa Baja 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. 3.7 4 km SW of Ramos, Puerto Rico
  2. 3.3 6 km NNW of Trujillo Alto, Puerto Rico
  3. 3.1 21 km N of Brenas, Puerto Rico
  4. 3.3 29 km NNE of Suárez, Puerto Rico
  5. 3.2 55 km N of Loíza, Puerto Rico
  6. 3.2 64 km N of San Juan, Puerto Rico
  7. 3.2 50 km N of Suárez, Puerto Rico
  8. 2.7 3 km SE of Pájaros, Puerto Rico
  9. 2.4 5 km WNW of Aguas Buenas, Puerto Rico
  10. 3.0 27 km NNW of Brenas, Puerto Rico
  11. 3.1 65 km N of San Juan, Puerto Rico
  12. 3.9 52 km N of Suárez, Puerto Rico
  13. 2.9 4 km NNW of Santa Barbara, Puerto Rico
  14. 2.9 42 km N of San Juan, Puerto Rico
  15. 3.1 37 km N of San Juan, 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 4.4 on 2018-12-09 — it released about 120 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.