QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2md

Earthquake near Humacao, PR

No earthquake was likely felt in Humacao in the 24 hours to 9:02 am AST (13:02 UTC). The last one was M 4.1, 56 km (35 mi) ESE, at 5:44 am AST on 28 October 2026, estimated intensity II (weak) in town; 5 felt reports to USGS. Every earthquake near Humacao

This page: a magnitude 2.2 earthquake was recorded 11 km (7 mi) south-southeast of Humacao, PR, at 12:25 am AST on 16 March 2023 (04:25 UTC), 15 km deep. 1 person has reported feeling it to USGS.

USGS: Puerto Rico region

48 km (30 mi) SE of San Juan, PR · 32 km (20 mi) SE of Caguas, PR

12:25 am AST, Mar 16, 2023 · · 15 km deep · released about 67 lb of TNT

Every earthquake near Humacao Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Yabucoa Municipio 7 kmHumacao Municipio 9 kmMaunabo Municipio 12 kmLas Piedras Municipio 17 kmNaguabo Municipio 19 kmPatillas Municipio 21 kmSan Lorenzo Municipio 22 kmJuncos Municipio 22 kmArroyo Municipio 27 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
12:25 am AST on 16 March 2023 ()
Where
11 km (7 mi) south-southeast of Humacao, PR · earthquakes near Humacao
Magnitude
M 2.2 (md)
Depth
15 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Yabucoa Municipio, 7 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1336 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 12 km (7 mi) from the epicentre. In Humacao, 11 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 11 km, intensity II · Humacao 11 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 67 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 230,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 160,000× the energy of this one
  3. Around the size people start to feel M 3.0 14× the energy of this one
  4. This earthquake M 2.2 about 67 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 in our catalogue was M 4.8 on 2021-10-08 — about 7,200 times the energy of this one.

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 18.0525, -65.7965. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Yabucoa Municipio, PR 7 km (4 mi) W earthquakes near Yabucoa Municipio
Humacao Municipio, PR 9 km (6 mi) N earthquakes near Humacao Municipio
Maunabo Municipio, PR 12 km (8 mi) WSW earthquakes near Maunabo Municipio
Las Piedras Municipio, PR 17 km (11 mi) NNW earthquakes near Las Piedras Municipio
Naguabo Municipio, PR 19 km (12 mi) NNE earthquakes near Naguabo Municipio
Patillas Municipio, PR 21 km (13 mi) WSW earthquakes near Patillas Municipio

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

Aftershocks so far

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

  1. 2.9 1 km WSW of Coquí, Puerto Rico
  2. 2.6 Puerto Rico region
  3. 2.6 2 km WNW of Bayamon, Puerto Rico
  4. 2.9 2 km NNE of Parcelas La Milagrosa, Puerto Rico
  5. 2.7 1 km W of Juncos, Puerto Rico
  6. 3.0 Puerto Rico region
  7. 3.0 Puerto Rico region
  8. 2.6 6 km S of Emajagua, Puerto Rico
  9. 2.7 5 km SSE of Esperanza, Puerto Rico
  10. 3.0 1 km E of Jagual, Puerto Rico
  11. 2.4 23 km SSE of Arroyo, Puerto Rico
  12. 2.7 2 km E of Santa Clara, Puerto Rico
  13. 3.0 1 km ENE of Bayamon, Puerto Rico
  14. 2.2 12 km SSE of Arroyo, Puerto Rico
  15. 2.8 24 km ESE of El Negro, 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.