QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4md

Earthquake near Punta Santiago, PR

No earthquake was likely felt in Punta Santiago in the 24 hours to 10:48 am AST (14:48 UTC). The last one was M 4.1, 49 km (31 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 Punta Santiago

This page: a magnitude 2.4 earthquake was recorded 11 km (7 mi) south-southeast of Punta Santiago, PR, at 4:35 am AST on 31 October 2024 (08:35 UTC), 13 km deep.

USGS: 11 km SSE of Punta Santiago, Puerto Rico

52 km (32 mi) SE of San Juan, PR · 39 km (24 mi) ESE of Caguas, PR

4:35 am AST, Oct 31, 2024 · · 13 km deep · released about 110 lb of TNT

Every earthquake near Punta Santiago Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Humacao Municipio 10 kmYabucoa Municipio 15 kmNaguabo Municipio 16 kmMaunabo Municipio 21 kmLas Piedras Municipio 21 kmCeiba Municipio 22 kmJuncos Municipio 27 kmSan Lorenzo Municipio 29 kmPatillas Municipio 30 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
4:35 am AST on 31 October 2024 ()
Where
11 km (7 mi) south-southeast of Punta Santiago, PR · earthquakes near Punta Santiago
Magnitude
M 2.4 (md)
Depth
13 km below the surface
Felt
no reports yet
Nearest
Humacao Municipio, 10 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 741 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. In Punta Santiago, 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: Humacao 15 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 110 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 140,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 99,000× the energy of this one
  3. Around the size people start to feel M 3.0 8.8× the energy of this one
  4. This earthquake M 2.4 about 110 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 4.8 on 2021-10-08 — about 4,400 times the energy of this one.

Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:

  1. 5.1 3 km W of Aguas Buenas, Puerto Rico · 49 km WNW 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 18.0717, -65.7140. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Humacao Municipio, PR 10 km (6 mi) NW earthquakes near Humacao Municipio
Yabucoa Municipio, PR 15 km (10 mi) W earthquakes near Yabucoa Municipio
Naguabo Municipio, PR 16 km (10 mi) N earthquakes near Naguabo Municipio
Maunabo Municipio, PR 21 km (13 mi) WSW earthquakes near Maunabo Municipio
Las Piedras Municipio, PR 21 km (13 mi) NW earthquakes near Las Piedras Municipio
Ceiba Municipio, PR 22 km (14 mi) NNE earthquakes near Ceiba Municipio

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

Aftershocks so far

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

  1. 2.4 4 km SW of Las Piedras, Puerto Rico
  2. 2.0 8 km SE of Jobos, Puerto Rico
  3. 2.3 8 km SSE of Jobos, Puerto Rico
  4. 3.1 2 km NW of Hato Candal, Puerto Rico
  5. 3.4 2 km N of Pueblito del Rio, Puerto Rico
  6. 1.6 2 km S of G. L. Garcia, Puerto Rico
  7. 2.2 3 km ESE of G. L. Garcia, Puerto Rico
  8. 2.4 4 km SW of Las Piedras, Puerto Rico
  9. 2.5 2 km SE of Esperanza, Puerto Rico
  10. 2.2 4 km SSW of Las Piedras, Puerto Rico
  11. 2.1 4 km SSW of Las Piedras, Puerto Rico
  12. 2.6 3 km SSW of Las Piedras, Puerto Rico
  13. 2.1 4 km SSE of Juncos, Puerto Rico
  14. 2.5 9 km SE of Emajagua, Puerto Rico
  15. 2.4 5 km SSW of Las Piedras, 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.