QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

Earthquake near El Negro, PR

Yes: an earthquake was likely felt in El Negro in the last 24 hours. M 2.9, 24 km (15 mi) SSE of El Negro, at 5:20 pm AST on 11 November 2026 (21:20 UTC); the estimated shaking in El Negro was intensity II (weak). 1 person has reported feeling it to USGS. Every earthquake near El Negro

This page: a magnitude 3.1 earthquake was recorded 25 km (15 mi) southeast of El Negro, PR, at 11:50 pm AST on 19 January 2022 (03:50 UTC), 4.0 km deep. 1 person has reported feeling it to USGS.

USGS: 24 km SE of El Negro, Puerto Rico

70 km (44 mi) SE of San Juan, PR · 54 km (33 mi) SE of Caguas, PR

11:50 pm AST, Jan 19, 2022 · · 4.0 km deep · released about 1,400 lb of TNT

Every earthquake near El Negro Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Maunabo Municipio 26 kmYabucoa Municipio 27 kmHumacao Municipio 29 kmPatillas Municipio 35 kmNaguabo Municipio 36 kmVieques Municipio 36 kmLas Piedras Municipio 39 kmArroyo Municipio 40 kmCeiba Municipio 40 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
11:50 pm AST on 19 January 2022 ()
Where
25 km (15 mi) southeast of El Negro, PR · earthquakes near El Negro
Magnitude
M 3.1 (md)
Depth
4.0 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Maunabo Municipio, 26 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1559 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 42 km (26 mi) from the epicentre. In El Negro, 25 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: Emajagua 25 km, intensity II · Esperanza 31 km, intensity II · Humacao 33 km, intensity II · Isabel Segunda 38 km, intensity II · Aguas Claras 40 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 1,400 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 230,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 10,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,400× the energy of this one
  4. This earthquake M 3.1 about 1,400 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.5× 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 4.8 on 2021-10-08 — about 330 times the energy of this one.

Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.

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 17.8935, -65.6743. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Maunabo Municipio, PR 26 km (16 mi) WNW earthquakes near Maunabo Municipio
Yabucoa Municipio, PR 27 km (17 mi) NW earthquakes near Yabucoa Municipio
Humacao Municipio, PR 29 km (18 mi) NNW earthquakes near Humacao Municipio
Patillas Municipio, PR 35 km (22 mi) WNW earthquakes near Patillas Municipio
Naguabo Municipio, PR 36 km (22 mi) N earthquakes near Naguabo Municipio
Vieques Municipio, PR 36 km (23 mi) NE earthquakes near Vieques Municipio

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

Aftershocks so far

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

  1. 2.9 25 km SE of Emajagua, Puerto Rico
  2. 3.5 14 km SSE of Lamboglia, Puerto Rico
  3. 2.8 17 km S of Lamboglia, Puerto Rico
  4. 3.0 28 km SE of El Negro, Puerto Rico
  5. 3.7 4 km E of Punta Santiago, Puerto Rico
  6. 3.1 5 km ESE of Punta Santiago, Puerto Rico
  7. 2.9 18 km SW of Esperanza, Puerto Rico
  8. 2.9 13 km SE of Esperanza, Puerto Rico
  9. 2.8 17 km SSE of Esperanza, Puerto Rico
  10. 2.5 23 km S of Arroyo, Puerto Rico
  11. 2.4 7 km SSE of Jobos, Puerto Rico
  12. 2.0 5 km ESE of Jobos, Puerto Rico
  13. 2.8 3 km ESE of Jobos, Puerto Rico
  14. 3.0 54 km S of Emajagua, Puerto Rico
  15. 2.3 1 km WNW of Esperanza, 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.