The volcano famously experienced the largest caldera-forming eruption Europe has seen in the past 200,000 years.
Rescue workers are still battling to reach the hardest-hit areas of Saturday's disaster.
The eruption started in April and continued through August, as magma drained and the caldera collapsed.
Scientists analyzing volcanic samples in Italy find similar conditions preceded eruptions over the last 60,000 years.
Misinformation, one scientist said, "causes unnecessary and unfounded anxiety" about the iconic national park.
Forensic analysis of skeletons found in ash deposit reveal what happened to people in path of volcano.
It reportedly registered a magnitude of about 4.3.
"Trees are falling, visibility is very very poor, we cannot see far more than [six feet]," one humanitarian worker said.
A hydrovolcanic explosion could have caused the explosion that hit a tour boat in Hawaii.
Another small explosion occurred at Hawaii's Kilauea volcano Sunday morning, spewing ash plumes over Kau, the southernmost district of Big Island.
"The first thing that comes to my mind when I think back on it was just how loud it was, the roar of the eruption."
Ash from the eruption of the Fuego volcano rained down on the surrounding area, while rapid pyroclastic flows rushed through nearby towns.
Images captured from a helicopter show seaside homes engulfed in flames as clouds of white steam and hydrochloric acid fumes billow from the water.
Around two million people have been affected by the volcano, and an as yet unknown number of people are missing.
A lahar, which is essentially a mudflow filled with rock particles, can reach speeds as high as 120 miles per hour.
"There are injured, burned and dead people."
A tide of molten rock has turned residential streets in Hawaii into a volcanic wasteland as residents flee a surge of lava heading towards them.