Randy Baldwin, a geophysicist at the U.S. Geological Survey, said the 6.0-magnitude quake is just one of many aftershocks that occurred with several 5.0-magnitude aftershocks overnight.
The latest natural disaster took place around 9:00 a.m. local time and has caused damage by the island's southern coast, where hundreds of schools and homes collapsed from the 6.4-magnitude quake Tuesday. Some 250,000 customers were hit by electric power outages after the quake, which struck at 6:32 am local time (1032GMT).
"Here in California, we have some of the most talented and experienced emergency management staff in the world", Cal OES Director Mark Ghilarducci said in a statement.
Hundreds of quakes have shaken the island since the new year, though most were too slight to be felt.
Rodriguez and her husband have been living in a tent in Guanica, one of the hardest hit areas.
More than 4,000 people are in shelters, many fearful of returning to their homes, and others unable to because of extensive damage.
Met Éireann issues Status Orange wind warnings for Monday
Weather warnings have been issued by the Met Office for the region, advising people of potential disruption. The forecaster is predicting gusts of up to 130 kilometres per hour.
Vazquez is seeking a U.S. government disaster statement to release more federal funds.
It was the strongest since last week's 6.4 quake.
NASA reported Friday that the quakes had moved the land in parts of southern Puerto Rico as much as 5.5 inches (14 centimetres), based on satellite images before and after the temblors. A newspaper on the island put the figure at $460 million.
The earthquakes have brought renewed attention to squabbling over the $18 billion in federal funds that Congress designated after Hurricane Maria devastated the island in 2017.
Trump himself has also been criticized for not making any public comments about the earthquakes.
"The real motivation for withholding these dollars is Donald Trump's disdain for the people of Puerto Rico and heartless disregard for their suffering", Velazquez told Daily News.