The terrifying photographs were taken at Mount Sinabung in North Sumatra, just under 2,000 miles from Mount Agung in Bali.
Alex Bogár shared an image with the comment: “Part of the dome gone down at Sinabung today after spending several weeks with Vulcanian activity and smaller collapses.”
Other images show farmers tending their crops as great clouds of ash loom overhead.
Mount Sinabung has erupted regularly since 2010 and was pictured spewing streams of molten lava at the tail end of last week.
Located in Indonesia’s Karo regency, Sinabung is about 1,865 miles about away from Bali’s largest volcano Mount Agung, which has been on the brink of eruption for more than a month.
Both volcanoes sit on the ominously named Pacific Ring of Fire, which is the most active earthquake belt in the world and home to about 450 volcanoes.
Locals living close to Sinabung have been told to stay at least 7 km (4.3 miles) away from the volcano at all times, after 10 people were killed by an eruption earlier this year.
Meanwhile over in Bali, Mount Agung was rocked by a huge magnitude 6.7 earthquake today. It was the most powerful earthquake to hit the volcano since the alert was raised to level four last month.
Shocking seismograph data shows dramatic spikes in movement underneath the Bali volcano, reigniting fears that an eruption is imminent.
Mark G Spychala, an atmospheric scientist at St Edward’s University in Texas, tweeted: “Some serious readouts on the seismogram in the last hour from Bali volcano Mt Agung and nearby sites.
“Unsure about status.”
But he later added: “Mt Agung has not yet erupted.”
The earthquake was recorded at a depth of 341 miles (549km) in the Flores Sea near Bali, according to the United States Geological Survey (USGS).
The USGS has since confirmed that quake is not expected to cause a tsunami.
About 180,000 Balinese locals have abandoned their homes to escape the threat of eruption, according official estimates.
Of these about 150,000 are staying in the many evacuation camps that have been set up around the island.
Read more – BALI VOLCANO UPDATE LIVE