QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

96 km N of Hatillo, Puerto Rico

Yes. A magnitude 3.0 earthquake was recorded 96 km N of Hatillo, Puerto Rico, at 9:22 pm AST on 1 December 2017 (01:22 UTC), 57 km deep. 1 person has reported feeling it to USGS.

· 57 km deep · released about 1,100 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Isabela Municipio 98 kmQuebradillas Municipio 99 kmCamuy Municipio 101 kmHatillo Municipio 102 kmAguadilla Municipio 102 kmBarceloneta Municipio 103 kmArecibo Municipio 104 kmManatí Municipio 108 kmVega Baja Municipio 111 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
57 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Isabela Municipio, 98 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1557 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 it was probably too small to be felt, even directly above it. 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.

How big was it?

This earthquake released about 1,100 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 6.7 310,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 14,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 9,800× the energy of this one
  4. This earthquake M 3.0 about 1,100 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 since 2016 was M 4.7 on 2017-07-17 — about 270 times the energy of this one.

Before 2016, the USGS record lists 12 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.4 61 km N of Hatillo, Puerto Rico · 35 km S of this epicentre
  2. 6.0 93 km NNW of San Antonio, Puerto Rico · 46 km W of this epicentre
  3. 6.0 81 km N of Isabela, Puerto Rico · 16 km SSW of this epicentre
  4. 5.9 78 km N of Arecibo, Puerto Rico · 30 km SE of this epicentre
  5. 5.7 78 km N of Tierras Nuevas Poniente, Puerto Rico · 38 km SE 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 19.3561, -66.8528. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Isabela Municipio, PR 98 km (61 mi) S earthquakes near Isabela Municipio
Quebradillas Municipio, PR 99 km (62 mi) S earthquakes near Quebradillas Municipio
Camuy Municipio, PR 101 km (63 mi) S earthquakes near Camuy Municipio
Hatillo Municipio, PR 102 km (63 mi) S earthquakes near Hatillo Municipio
Aguadilla Municipio, PR 102 km (63 mi) SSW earthquakes near Aguadilla Municipio
Barceloneta Municipio, PR 103 km (64 mi) SSE earthquakes near Barceloneta Municipio

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

Aftershocks so far

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

  1. 2.7 54 km N of Isabela, Puerto Rico
  2. 3.0 54 km N of Carrizales, Puerto Rico
  3. 3.2 67 km NNE of Arecibo, Puerto Rico
  4. 2.9 67 km N of Hatillo, Puerto Rico
  5. 2.6 64 km N of Tierras Nuevas Poniente, Puerto Rico
  6. 3.1 100 km N of Isabela, Puerto Rico
  7. 3.2 93 km NNW of San Antonio, Puerto Rico
  8. 2.9 74 km N of Tierras Nuevas Poniente, Puerto Rico
  9. 2.8 49 km N of Isabela, Puerto Rico
  10. 2.5 66 km N of Tierras Nuevas Poniente, Puerto Rico
  11. 2.7 55 km N of Isabela, Puerto Rico
  12. 2.9 70 km N of Tierras Nuevas Poniente, Puerto Rico
  13. 3.0 77 km N of Tierras Nuevas Poniente, Puerto Rico
  14. 3.2 73 km N of Tierras Nuevas Poniente, Puerto Rico
  15. 3.1 86 km N of Isabela, 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.