The study helps explain why material from volcanoes can travel so far and so fast.
Researchers discovered vegetation and wildlife thriving on the newly formed island.
The tallest geyser in the world had 32 water eruptions in 2018.
Indonesia's Meteorology, Geophysics and Climatology Agency urged anybody near the coastline to keep a distance of at least 500 meters.
Rescue workers are still battling to reach the hardest-hit areas of Saturday's disaster.
The earthquake swarm at the western part of the national park lasted for three and a half months.
The eruption started in April and continued through August, as magma drained and the caldera collapsed.
Misinformation, one scientist said, "causes unnecessary and unfounded anxiety" about the iconic national park.
It reportedly registered a magnitude of about 4.3.
Helicopters search Mount Rinjani to find the climbers.
"Trees are falling, visibility is very very poor, we cannot see far more than [six feet]," one humanitarian worker said.
It's headed for the boat ramp in Isaac Hale Park.
See the coastline of Hawaii before and after the Kilauea volcano added acres and acres of lava land.