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According to the Kamchatka observatory, the country’s most active and largest volcano registered a volcanic ash cloud rising to a height of approximately 3,962.4 meters on Saturday.

The lava dome continues to grow as it glows, accompanied by explosions and hot avalanches, the observatory said on Sunday.

Ash explosions of 10-15 kilometers can occur at any time.

Continued activity may affect international and low-flying aircraft, the Russian volcano monitoring organization warns Independent according to

The dome of the volcano has become very hot and glows at night, said Alexei Ozerov, director of the Institute of Volcanology and Seismology of the Far Eastern Branch of the Russian Academy of Sciences.

At night, almost the entire surface of the dome glows. Hot, 1000-degree avalanches roll down the slopes, pyroclastic flows rush down.

The condition of the dome is usually observed before a strong paroxysmal eruption. It last erupted in October 2010, spewing ash 10 kilometers above sea level. The ash clouds of the volcano covered the settlement of Ust-Kamchatsky, located about 90 kilometers away. The strongest outbreakwhich last happened in Sivelucs, but according to NASA it was recorded in 2009.

Sivelucs is one of the largest volcanoes in Kamchatka, whose peak reaches 3,283 meters. It is also one of the most active volcanoes on the peninsula, with an estimated 60 major eruptions in the past 10,000 years.

Catastrophic eruptions occurred in 1854 and 1956, when a large portion of the lava dome collapsed, creating a devastating debris avalanche.