QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4md

Earthquake near Tierras Nuevas Poniente, PR

No earthquake was likely felt in Tierras Nuevas Poniente in the 24 hours to 2:03 am AST (06:03 UTC). The last one was M 2.9, 17 km (11 mi) WNW, at 2:05 am AST on 13 October 2026, estimated intensity II (weak) in town. Every earthquake near Tierras Nuevas Poniente

This page: a magnitude 3.4 earthquake was recorded 13 km (8 mi) north-northeast of Tierras Nuevas Poniente, PR, at 1:41 am AST on 29 March 2022 (05:41 UTC), 79 km deep. 1 person has reported feeling it to USGS.

USGS: 13 km NNE of Tierras Nuevas Poniente, Puerto Rico

42 km (26 mi) WNW of San Juan, PR · 34 km (21 mi) NW of Bayamón, PR

1:41 am AST, Mar 29, 2022 · · 79 km deep · released about 1.9 tons of TNT

Every earthquake near Tierras Nuevas Poniente Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Vega Baja Municipio 12 kmManatí Municipio 15 kmVega Alta Municipio 17 kmBarceloneta Municipio 18 kmDorado Municipio 20 kmFlorida Municipio 26 kmToa Baja Municipio 27 kmMorovis Municipio 27 kmToa Alta Municipio 29 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
1:41 am AST on 29 March 2022 ()
Where
13 km (8 mi) north-northeast of Tierras Nuevas Poniente, PR · earthquakes near Tierras Nuevas Poniente
Magnitude
M 3.4 (md)
Depth
79 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Vega Baja Municipio, 12 km SSE
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 it was probably too small to be felt, even directly above it. In Tierras Nuevas Poniente, 13 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.

Earthquakes near other towns within 30 km: Sabana, Vega Baja, Brenas, Coto Norte, Ceiba, Monserrate.

How big was it?

This earthquake released about 1.9 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.4 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 89,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 4,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,800× the energy of this one
  4. This earthquake M 3.4 about 1.9 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 4× 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 2017-08-18 — about 130 times the energy of this one.

Before 2016, the USGS record lists 3 earthquakes of M5 or more within 50 km:

  1. 5.8 12 km N of Garrochales, Puerto Rico · 15 km W of this epicentre
  2. 5.1 3 km W of Aguas Buenas, Puerto Rico · 45 km SE of this epicentre
  3. 5.0 3 km N of Brenas, Puerto Rico · 11 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 18.5620, -66.4228. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Vega Baja Municipio, PR 12 km (8 mi) SSE earthquakes near Vega Baja Municipio
Manatí Municipio, PR 15 km (9 mi) SSW earthquakes near Manatí Municipio
Vega Alta Municipio, PR 17 km (10 mi) SSE earthquakes near Vega Alta Municipio
Barceloneta Municipio, PR 18 km (11 mi) SW earthquakes near Barceloneta Municipio
Dorado Municipio, PR 20 km (12 mi) ESE earthquakes near Dorado Municipio
Florida Municipio, PR 26 km (16 mi) SW earthquakes near Florida Municipio

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

Aftershocks so far

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

  1. 3.3 1 km SE of Toa Baja, Puerto Rico
  2. 3.0 23 km NNE of Arecibo, Puerto Rico
  3. 3.0 18 km N of Arecibo, Puerto Rico
  4. 2.7 4 km ENE of Tierras Nuevas Poniente, Puerto Rico
  5. 2.1 8 km N of Arecibo, Puerto Rico
  6. 3.1 32 km N of San Juan, Puerto Rico
  7. 3.1 5 km SSE of Pájaros, Puerto Rico
  8. 2.8 7 km NNW of San Juan, Puerto Rico
  9. 2.9 11 km N of Camuy, Puerto Rico
  10. 2.9 18 km N of Arecibo, Puerto Rico
  11. 2.9 1 km WNW of Río Lajas, Puerto Rico
  12. 3.0 5 km N of Levittown, Puerto Rico
  13. 2.0 Puerto Rico region
  14. 2.3 Puerto Rico region
  15. 2.8 20 km N of Tierras Nuevas Poniente, 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.