QuakeIndex

Earthquake · reviewed by a seismologist

M 2.0ml

79 km NW of San Antonio, Puerto Rico

Yes. A magnitude 2.0 earthquake was recorded 79 km NW of San Antonio, Puerto Rico, at 8:34 pm AST on 16 April 2020 (00:34 UTC), 3.0 km deep.

· 3.0 km deep · released about 36 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Aguadilla Municipio 77 kmRincón Municipio 82 kmAguada Municipio 83 kmIsabela Municipio 87 kmMoca Municipio 90 kmAñasco Municipio 94 kmQuebradillas Municipio 96 kmMayagüez Municipio 101 kmSan Sebastián Municipio 102 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 2.0 (ml)
Depth
3.0 km below the surface
Felt
no reports yet
Nearest
Aguadilla Municipio, 77 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2316 days ago

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

At this magnitude and depth, people at rest would likely notice it out to about 16 km (10 mi) from the epicentre. 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 36 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 420,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 300,000× the energy of this one
  3. Around the size people start to feel M 3.0 27× the energy of this one
  4. This earthquake M 2.0 about 36 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 6.0 on 2019-09-24 — about 840,000 times the energy of this one.

Before 2016, the USGS record lists 16 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.8 94 km NE of Punta Cana, Dominican Republic · 19 km NNW of this epicentre
  2. 6.4 32 km NW of Aguadilla, Puerto Rico · 49 km SE of this epicentre
  3. 6.1 80 km NE of Punta Cana, Dominican Republic · 30 km NW of this epicentre
  4. 6.0 67 km NNW of San Antonio, Puerto Rico · 45 km ENE of this epicentre
  5. 5.8 33 km NW of San Antonio, Puerto Rico · 46 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 18.9673, -67.6655. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Aguadilla Municipio, PR 77 km (48 mi) SE earthquakes near Aguadilla Municipio
Rincón Municipio, PR 82 km (51 mi) SSE earthquakes near Rincón Municipio
Aguada Municipio, PR 83 km (52 mi) SE earthquakes near Aguada Municipio
Isabela Municipio, PR 87 km (54 mi) SE earthquakes near Isabela Municipio
Moca Municipio, PR 90 km (56 mi) SE earthquakes near Moca Municipio
Añasco Municipio, PR 94 km (59 mi) SE earthquakes near Añasco Municipio

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

Aftershocks so far

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

  1. 3.1 92 km NW of San Antonio, Puerto Rico
  2. 3.2 90 km NNW of San Antonio, Puerto Rico
  3. 3.6 106 km NNW of San Antonio, Puerto Rico
  4. 3.5 105 km NE of Punta Cana, Dominican Republic
  5. 2.5 101 km NE of Punta Cana, Dominican Republic
  6. 3.3 88 km NE of Punta Cana, Dominican Republic
  7. 3.4 87 km NNW of San Antonio, Puerto Rico
  8. 3.4 81 km NW of San Antonio, Puerto Rico
  9. 3.6 74 km NW of San Antonio, Puerto Rico
  10. 3.3 81 km NW of San Antonio, Puerto Rico
  11. 3.4 98 km NW of San Antonio, Puerto Rico
  12. 1.9 65 km N of San Antonio, Puerto Rico
  13. 3.5 78 km NNW of San Antonio, Puerto Rico
  14. 3.3 72 km NW of Aguadilla, Puerto Rico
  15. 3.5 82 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.

On USGS

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