M4.8

USGS earthquake · M4.85 km SW of Guánica

🇵🇷 - Puerto Rico

· 33 days ago

Map centered on the earthquake at 5 km SW of Guánica, Puerto Rico, with a marker at its epicenterFuigGuanicaEl TumbaoMaria AntoniaBetancesYaucoOpen in Apple Maps ↗
Shaking intensity
  1. II
  2. III
  3. IV

Strongest contour: Light (IV). Modelled by USGS ShakeMap; contours show where shaking was expected to reach each level, not damage.

Depth7.0 km
Origin timeSep 18, 2026, 1:19 PM UTC
Coordinates17.939, -66.945
Tsunami flagNot reported
Estimated shakingLight (IV)Modelled by USGS ShakeMap
Reported shakingStrong (VI)From 85 public reports
Magnitude scaleLocal magnitude
SolutionReviewed by a seismologist
Who felt it

People in the shaking

In the modelled area2.5 million
At light shaking or above120,000
  1. IVLight120,000
  2. IIIWeak538,000
  3. IIWeak1.9 million
Nearby towns and the shaking modelled for each
PlacePopulationShaking
Fuig1,000IV
Guanica6,000IV
El Tumbao1,000IV
Maria Antonia2,000IV
Betances732IV
Yauco80,000IV
Palmarejo2,000IV
Palomas1,000IV

Past earthquakes here. A magnitude 6.7 earthquake 258 km s of this event struck UK on June 24, 1984 (UTC), with estimated population exposures of 2,981,000 at intensity VI and 326,000 at intensity VII, resulting in a reported 5 fatalities.

Local buildings. Overall, the population in this region resides in structures that are resistant to earthquake shaking, though vulnerable structures exist. The predominant vulnerable building types are mud wall and informal (metal, timber, GI etc.) construction.

Population and intensity modelled by USGS PAGER. Estimates, not a count of people affected.

Official source

U.S. Geological Survey

Terremoto preserves this event snapshot for a stable public link. USGS remains the authoritative source for revisions and scientific details. Shaking contours and population estimates come from USGS ShakeMap and PAGER, which revise them as more data arrives.

View the USGS record ↗