QuakeIndex

Earthquake · reviewed by a seismologist

M 3.6md

Earthquake near Hatillo, PR

No earthquake was likely felt in Hatillo in the 24 hours to 11:30 am AST (15:30 UTC). The last one was M 3.4, 40 km (25 mi) NW, at 9:00 pm AST on 27 October 2026, estimated intensity II (weak) in town. Every earthquake near Hatillo

This page: a magnitude 3.6 earthquake was recorded 11 km (7 mi) north-northeast of Hatillo, PR, at 2:46 am AST on 25 January 2023 (06:46 UTC), 13 km deep. 1 person has reported feeling it to USGS.

USGS: 11 km NNE of Hatillo, Puerto Rico

80 km (50 mi) WNW of San Juan, PR · 16 km (10 mi) NNW of Arecibo, PR

2:46 am AST, Jan 25, 2023 · · 13 km deep · released about 4.2 tons of TNT

Every earthquake near Hatillo Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Hatillo Municipio 16 kmCamuy Municipio 17 kmQuebradillas Municipio 19 kmArecibo Municipio 21 kmIsabela Municipio 25 kmBarceloneta Municipio 28 kmSan Sebastián Municipio 33 kmFlorida Municipio 35 kmLares Municipio 35 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
2:46 am AST on 25 January 2023 ()
Where
11 km (7 mi) north-northeast of Hatillo, PR · earthquakes near Hatillo
Magnitude
M 3.6 (md)
Depth
13 km below the surface
Felt
1 report · strongest reported intensity I
Nearest
Hatillo Municipio, 16 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1310 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 70 km (43 mi) from the epicentre. In Hatillo, 11 km away, the estimate is intensity III (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: Hatillo 11 km, intensity III · Arecibo 15 km, intensity III · Quebradillas 19 km, intensity III · Isabela 25 km, intensity III · Barceloneta 31 km, intensity II · Rafael Hernandez 32 km, intensity II · Lares 33 km, intensity II · San Sebastián 34 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 4.2 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.6 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 40,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,300× the energy of this one
  4. This earthquake M 3.6 about 4.2 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 8.8× 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 4.4 on 2018-12-09 — about 14 times the energy of this one.

Before 2016, the USGS record lists 10 earthquakes of M5 or more within 50 km; the five largest:

  1. 7.7 45 km N of San Antonio, Puerto Rico · 49 km NW of this epicentre
  2. 7.1 24 km NNW of San Antonio, Puerto Rico · 43 km WNW of this epicentre
  3. 6.3 6 km WNW of Aguadilla, Puerto Rico · 46 km WSW of this epicentre
  4. 6.1 15 km WNW of San Antonio, Puerto Rico · 46 km W of this epicentre
  5. 6.1 18 km NNW of San Antonio, Puerto Rico · 41 km W 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 18.5828, -66.7998. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Hatillo Municipio, PR 16 km (10 mi) S earthquakes near Hatillo Municipio
Camuy Municipio, PR 17 km (10 mi) SSW earthquakes near Camuy Municipio
Quebradillas Municipio, PR 19 km (12 mi) SW earthquakes near Quebradillas Municipio
Arecibo Municipio, PR 21 km (13 mi) SE earthquakes near Arecibo Municipio
Isabela Municipio, PR 25 km (16 mi) WSW earthquakes near Isabela Municipio
Barceloneta Municipio, PR 28 km (18 mi) ESE earthquakes near Barceloneta Municipio

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

Aftershocks so far

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

  1. 2.9 30 km N of Arecibo, Puerto Rico
  2. 3.1 36 km N of Carrizales, Puerto Rico
  3. 3.4 52 km N of Hatillo, Puerto Rico
  4. 3.1 Puerto Rico region
  5. 3.1 54 km N of Hatillo, Puerto Rico
  6. 3.2 3 km NNW of Jayuya, Puerto Rico
  7. 2.8 15 km NE of Arecibo, Puerto Rico
  8. 2.8 17 km N of Isabela, Puerto Rico
  9. 2.0 6 km WNW of Maricao, Puerto Rico
  10. 2.8 23 km N of Tierras Nuevas Poniente, Puerto Rico
  11. 2.6 6 km N of Cayuco, Puerto Rico
  12. 2.9 Puerto Rico region
  13. 2.6 11 km N of Carrizales, Puerto Rico
  14. 2.5 3 km ESE of Las Marías, Puerto Rico
  15. 3.0 25 km NNE 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.