QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

Earthquake near Luis M. Cintron, PR

No earthquake was likely felt in Luis M. Cintron in the 24 hours to 12:35 am AST (04:35 UTC). The last one was M 4.1, 50 km (31 mi) SE, at 5:44 am AST on 28 October 2026, estimated intensity II (weak) in town; 5 felt reports to USGS. Every earthquake near Luis M. Cintron

This page: a magnitude 1.7 earthquake was recorded 16 km (10 mi) east of Luis M. Cintron, PR, at 1:03 am AST on 27 September 2019 (05:03 UTC), 16 km deep. 2 people have reported feeling it to USGS.

USGS: 15 km E of Luis M. Cintron, Puerto Rico

62 km (38 mi) ESE of San Juan, PR · 53 km (33 mi) ESE of Carolina, PR

1:03 am AST, Sep 27, 2019 · · 16 km deep · released about 12 lb of TNT

Every earthquake near Luis M. Cintron Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Ceiba Municipio 14 kmFajardo Municipio 15 kmVieques Municipio 20 kmCulebra Municipio 20 kmLuquillo Municipio 25 kmNaguabo Municipio 27 kmRío Grande Municipio 34 kmHumacao Municipio 36 kmLas Piedras Municipio 42 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
1:03 am AST on 27 September 2019 ()
Where
16 km (10 mi) east of Luis M. Cintron, PR · earthquakes near Luis M. Cintron
Magnitude
M 1.7 (md)
Depth
16 km below the surface
Felt
2 reports · strongest reported intensity IV
Nearest
Ceiba Municipio, 14 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2602 days ago

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

At this magnitude and depth it was probably too small to be felt, even directly above it. In Luis M. Cintron, 16 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.

Earthquakes near other towns within 30 km: Isabel Segunda, Fajardo, Aguas Claras, Culebra, Daguao, Esperanza.

How big was it?

This earthquake released about 12 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 870,000× the energy of this one
  3. Around the size people start to feel M 3.0 78× the energy of this one
  4. This earthquake M 1.7 about 12 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 4.3 on 2016-09-02 — about 6,900 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 18.2931, -65.4913. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Ceiba Municipio, PR 14 km (9 mi) WSW earthquakes near Ceiba Municipio
Fajardo Municipio, PR 15 km (9 mi) NW earthquakes near Fajardo Municipio
Vieques Municipio, PR 20 km (12 mi) SSE earthquakes near Vieques Municipio
Culebra Municipio, PR 20 km (12 mi) E earthquakes near Culebra Municipio
Luquillo Municipio, PR 25 km (15 mi) WNW earthquakes near Luquillo Municipio
Naguabo Municipio, PR 27 km (17 mi) WSW earthquakes near Naguabo Municipio

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

Aftershocks so far

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

  1. 3.4 26 km SSW of Esperanza, Puerto Rico
  2. 3.4 19 km NNE of Luquillo, Puerto Rico
  3. 3.4 25 km NNE of Culebra, Puerto Rico
  4. 3.4 3 km E of Esperanza, Puerto Rico
  5. 2.8 19 km SSE of Esperanza, Puerto Rico
  6. 2.3 2 km W of Humacao, Puerto Rico
  7. 3.3 19 km W of Charlotte Amalie, U.S. Virgin Islands
  8. 2.7 18 km SSW of Esperanza, Puerto Rico
  9. 2.1 13 km WSW of Esperanza, Puerto Rico
  10. 2.8 7 km SW of Esperanza, Puerto Rico
  11. 2.7 7 km W of Isabel Segunda, Puerto Rico
  12. 2.3 5 km SSE of El Negro, Puerto Rico
  13. 2.8 40 km NNE of Luquillo, Puerto Rico
  14. 2.2 8 km SSW of Esperanza, Puerto Rico
  15. 2.7 9 km ENE of Culebra, 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.