Gigantic hot lava burst forth with flames from the crater and slid off the slope of the mountain, while rains of ash containing volcanic materials, such as gravel, sand and others, continued Friday, said Huda.
The ash spread to nearby provinces, including Yogyakarta, Central Java province and even West Java province, Umar Rosadi, head of the national volcanology agency, said.
The last volcanic eruption of Mount Kelud occurred in 2007 and its strongest eruption took place in 1919 claiming 55 lives.
Indonesia has endured volcanic eruption of Mount Sinabung in North Sumatra for months that killed 17 people.
Mount Kelud is among 129 active volcanoes in Indonesia.
