“It is a pure surprise for us. We continue the monitoring and will analyze possible threats as data come in,” Olga Girina, the head of the special Kamchatka Volcanic Eruption Response Team (KVERT), told TASS news agency.
The volcano started spewing ash on Friday evening, and the ash could potentially cover the city of Severo-Kurilsk, located on the island of Paramushir.
Experts believe that the threat has already passed, though the orange code for aviation danger was assigned.
The Kambalny volcano is 2,156 meter high and is located in southern Kamchatka. The last time it erupted was during the reign of the Russian empress Catherine the Great, in 1769.
The Kamchatka Peninsula has around 300 volcanoes on its territory, with 29 of them active. In December, the Shiveluch volcano – in the northern part of Kamchatka – erupted and spewed ash to a height of 11,000 meters above sea level.