QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

2 km NNE of Las Marias, Puerto Rico

· 16 km deep · released about 24 lb of TNT

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10 km30 km60 km120 km N Añasco Municipio 3 kmAguada Municipio 8 kmMoca Municipio 9 kmRincón Municipio 12 kmSan Sebastián Municipio 18 kmAguadilla Municipio 18 kmLas Marías Municipio 19 kmHormigueros Municipio 20 kmIsabela Municipio 22 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 1.9 (md)
Depth
16 km below the surface
Felt
no reports yet
Nearest
Añasco Municipio, 3 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2470 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 24 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 640,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 450,000× the energy of this one
  3. Around the size people start to feel M 3.0 40× the energy of this one
  4. This earthquake M 1.9 about 24 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.

Where

Epicentre 18.3176, -67.1351. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Añasco Municipio, PR 3 km (2 mi) N of here earthquakes near Añasco Municipio
Aguada Municipio, PR 8 km (5 mi) SE of here earthquakes near Aguada Municipio
Moca Municipio, PR 9 km (6 mi) SW of here earthquakes near Moca Municipio
Rincón Municipio, PR 12 km (8 mi) E of here earthquakes near Rincón Municipio
San Sebastián Municipio, PR 18 km (11 mi) W of here earthquakes near San Sebastián Municipio
Aguadilla Municipio, PR 18 km (11 mi) S of here earthquakes near Aguadilla Municipio

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

Aftershocks so far

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

  1. 1.6 1 km WNW of Indios, Puerto Rico
  2. 2.6 4 km SSE of Maria Antonia, Puerto Rico
  3. 1.6 4 km N of San Germán, Puerto Rico
  4. 2.2 2 km WNW of Palmarejo, Puerto Rico
  5. 2.3 2 km NNW of Guayanilla, Puerto Rico
  6. 2.8 5 km NNE of Carrizales, Puerto Rico
  7. 3.3 23 km WSW of Stella, Puerto Rico
  8. 2.4 1 km ESE of Espino, Puerto Rico
  9. 2.4 2 km N of Cabo Rojo, Puerto Rico
  10. 2.8 9 km N of Quebradillas, Puerto Rico
  11. 2.2 14 km NNW of San Antonio, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.3 on 2019-09-05 — it released about 3,600 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.