QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

Earthquake near Emajagua, PR

No earthquake was likely felt in Emajagua in the 24 hours to 10:17 am AST (14:17 UTC). The last one was M 2.2, 7 km (5 mi) ESE, at 2:59 pm AST on 4 November 2026, estimated intensity II (weak) in town. Every earthquake near Emajagua

This page: a magnitude 2.7 earthquake was recorded 11 km (7 mi) southeast of Emajagua, PR, at 12:26 am AST on 24 July 2024 (04:26 UTC), 7.9 km deep.

USGS: 11 km SE of Emajagua, Puerto Rico

59 km (37 mi) SSE of San Juan, PR · 41 km (26 mi) SE of Caguas, PR

12:26 am AST, Jul 24, 2024 · · 7.9 km deep · released about 310 lb of TNT

Every earthquake near Emajagua Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Maunabo Municipio 13 kmYabucoa Municipio 15 kmPatillas Municipio 21 kmHumacao Municipio 22 kmArroyo Municipio 26 kmLas Piedras Municipio 29 kmSan Lorenzo Municipio 30 kmNaguabo Municipio 31 kmJuncos Municipio 34 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
12:26 am AST on 24 July 2024 ()
Where
11 km (7 mi) southeast of Emajagua, PR · earthquakes near Emajagua
Magnitude
M 2.7 (md)
Depth
7.9 km below the surface
Felt
no reports yet
Nearest
Maunabo Municipio, 13 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 840 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, people at rest would likely notice it out to about 23 km (14 mi) from the epicentre. In Emajagua, 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 23 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 310 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 50,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 35,000× the energy of this one
  3. Around the size people start to feel M 3.0 3.1× the energy of this one
  4. This earthquake M 2.7 about 310 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 1,600 times the energy of this one.

Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.

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 17.9412, -65.7943. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Maunabo Municipio, PR 13 km (8 mi) WNW earthquakes near Maunabo Municipio
Yabucoa Municipio, PR 15 km (9 mi) NNW earthquakes near Yabucoa Municipio
Patillas Municipio, PR 21 km (13 mi) WNW earthquakes near Patillas Municipio
Humacao Municipio, PR 22 km (13 mi) N earthquakes near Humacao Municipio
Arroyo Municipio, PR 26 km (16 mi) W earthquakes near Arroyo Municipio
Las Piedras Municipio, PR 29 km (18 mi) NNW earthquakes near Las Piedras Municipio

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

Aftershocks so far

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

  1. 1.9 3 km WNW of Jobos, Puerto Rico
  2. 2.2 20 km SE of El Negro, Puerto Rico
  3. 2.1 8 km S of Lamboglia, Puerto Rico
  4. 2.1 1 km ESE of Parcelas La Milagrosa, Puerto Rico
  5. 3.5 4 km ESE of G. L. Garcia, Puerto Rico
  6. 2.2 1 km SSW of G. L. Garcia, Puerto Rico
  7. 2.1 1 km NW of Humacao, Puerto Rico
  8. 3.4 4 km SE of G. L. Garcia, Puerto Rico
  9. 2.8 4 km WNW of Candelero Arriba, Puerto Rico
  10. 3.0 6 km E of Esperanza, Puerto Rico
  11. 2.0 3 km E of Santa Clara, Puerto Rico
  12. 2.5 18 km S of Lamboglia, Puerto Rico
  13. 3.0 18 km S of Lamboglia, Puerto Rico
  14. 2.7 29 km SSW of Esperanza, Puerto Rico
  15. 2.1 24 km S of Lamboglia, 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.