The eruption of Mount Agung on Indonesia's resort island Bali prompts cancellations of flights both to and from the island.
Scientists say the story may not be quite that simple, and that massive volcanic eruptions over hundreds of thousands of years may have contributed to the dinosaurs' demise at the end of the Cretaceous period.
The height of Anak Krakatoa has reduced to 110 meters from 338 meters.
Authorities raised the crater's status to high alert, the 2nd-highest warning on the country's 4-point danger scale, while aviation officials ordered flights to be redirected away from the area.
The likelihood of further tsunamis in the Sunda Strait is said to remain high as the volcano has been destabilised.
With the exact cause of the disaster still unknown, authorities are wary of the risk of a recurrence.
As the volcano's activity fell back to normal parameters, evacuees were asked for the sake of cautiousness to return home on Tuesday by bus.
Japan's Meteorological Agency said that volcanic earthquakes and sulfur emissions had increased at a peak on Kuchinoerabujima island.
543 hikers have been evacuated, only six people left to be rescued.
The national park authority said that a key route to the peak of the 3,726-metre (12,224-foot) volcano had been cleared, and a helicopter was dropping supplies to others still picking their way to safety.
A change in lava flow direction would destroy more residential areas after at least 712 homes were torched and thousands of residents forced to evacuate since Kilauea began erupting on May 3.
Anak Krakatau -- a small volcanic island that emerged from the ocean a half-century after Krakatoa's deadly 1883 eruption -- has rumbled back to life in recent weeks, spitting flaming rocks and ash from its crater.
Apart from the deaths, the eruption of Volcán de Fuego caused an estimated US$219 million worth of damage.
The boat was able to return to its port in Hilo less than an hour later, and three of the injured were taken to a local hospital by ambulance
The sacrifices at Mount Bromo were part of the Yadnya Kasada festival.
Ngurah Rai airport began operating around 2:30 pm local time (0730 GMT), about 12 hours after it closed in response to Mt. Agung belching smoke and ash.
Mount Agung, in northeastern Bali, has erupted with various intensities since late last year and in December the airport was also closed for a period and thousands were evacuated closer to the volcano.
The president's action is due to the aftermath of a series of recent volcanic eruptions, said Marta Larra, a spokesperson for Guatemala's Foreign Ministry.
Shinmoedake, in a mainly rural area about 985 km (616 miles) from Tokyo had quietened down since the earlier eruption, although admission to the 1,421-metre- (4,662-ft-) high peak remained restricted.
Officials have confirmed the deaths of 110 people as a result of the volcanic eruption on June 3, but another 197 people remain unaccounted for.
US President Donald Trump approved federal emergency housing aid and other relief for victims of the six-week-old Kilauea Volcano eruption on Hawaii's Big Island, where homes have been destroyed.
Authorities admitted they were late in warning locals to flee.
The death toll from Fuego's most violent eruption in four decades has been gradually rising and now stands at 109, the Central American country's disaster and forensic agency Inacif said.
Fears of a new blowup of the 3,763-meter (12,346-foot) volcano have stalked rescue workers since Sunday's eruption buried entire villages on its southern flank.