QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

Earthquake near Suárez, PR

No earthquake was likely felt in Suárez in the 24 hours to 10:47 am AST (14:47 UTC). The last one was M 4.1, 76 km (47 mi) SE, at 5:44 am AST on 28 October 2026, estimated intensity II (weak) in town; 5 felt reports to USGS. Every earthquake near Suárez

This page: a magnitude 3.3 earthquake was recorded 30 km (18 mi) north-northeast of Suárez, PR, at 12:47 pm AST on 7 March 2024 (16:47 UTC), 34 km deep.

USGS: 29 km NNE of Suárez, Puerto Rico

43 km (27 mi) NE of San Juan, PR · 37 km (23 mi) NNE of Carolina, PR

12:47 pm AST, Mar 7, 2024 · · 34 km deep · released about 1.3 tons of TNT

Every earthquake near Suárez Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Loíza Municipio 32 kmRío Grande Municipio 35 kmLuquillo Municipio 37 kmCarolina Municipio 38 kmFajardo Municipio 40 kmCanóvanas Municipio 41 kmSan Juan Municipio 42 kmTrujillo Alto Municipio 46 kmCataño Municipio 47 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
12:47 pm AST on 7 March 2024 ()
Where
30 km (18 mi) north-northeast of Suárez, PR · earthquakes near Suárez
Magnitude
M 3.3 (md)
Depth
34 km below the surface
Felt
no reports yet
Nearest
Loíza Municipio, 32 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 979 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 39 km (24 mi) from the epicentre. In Suárez, 30 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.

Likely felt in: Loíza 30 km, intensity II · Río Grande 35 km, intensity II · Luquillo 36 km, intensity II · Carolina 39 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 1.3 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 6.7 130,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 5,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,100× the energy of this one
  4. This earthquake M 3.3 about 1.3 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.7× 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 4.2 on 2023-12-25 — about 21 times the energy of this one.

Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:

  1. 5.0 73 km NNE of Vieques, Puerto Rico · 46 km NE of this epicentre

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 18.6897, -65.7848. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Loíza Municipio, PR 32 km (20 mi) SSW earthquakes near Loíza Municipio
Río Grande Municipio, PR 35 km (22 mi) S earthquakes near Río Grande Municipio
Luquillo Municipio, PR 37 km (23 mi) SSE earthquakes near Luquillo Municipio
Carolina Municipio, PR 38 km (24 mi) SSW earthquakes near Carolina Municipio
Fajardo Municipio, PR 40 km (25 mi) SSE earthquakes near Fajardo Municipio
Canóvanas Municipio, PR 41 km (26 mi) SSW earthquakes near Canóvanas Municipio

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

Aftershocks so far

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

  1. 3.1 39 km N of San Juan, Puerto Rico
  2. 3.3 48 km N of Suárez, Puerto Rico
  3. 3.2 41 km N of San Juan, Puerto Rico
  4. 3.4 9 km NNE of San Juan, Puerto Rico
  5. 3.4 56 km N of Suárez, Puerto Rico
  6. 3.3 59 km NNE of Luquillo, Puerto Rico
  7. 3.4 1 km S of Canovanas, Puerto Rico
  8. 3.1 73 km NNE of San Juan, Puerto Rico
  9. 3.4 69 km N of San Juan, Puerto Rico
  10. 2.8 43 km NNE of Vieques, Puerto Rico
  11. 3.0 37 km N of Dorado, Puerto Rico
  12. 3.1 49 km NNE of Vieques, Puerto Rico
  13. 3.3 51 km NNE of Suárez, Puerto Rico
  14. 3.0 73 km NNE of Vieques, Puerto Rico
  15. 3.0 31 km NE of Vieques, 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.