The last eruption of Klyuchevskaya Sopka began on September 27, 2022 and continues as of today (October 27, 2023).
It is important to note that volcanic activity is constantly monitored and can change rapidly. For the most up-to-date information, you should consult reliable sources such as the Smithsonian Institution's Global Volcanism Program or the Kamchatka Volcanic Eruption Response Team (KVERT).
