An explosive eruption of Young Shiveluch Volcano occurred on September 22, 2005, discharging a pyroclastic flow about 20 km long in the Baidarnaya River valley and an ashfall in the area of the Northern cluster of volcanoes.

Volcano Young Sheveluch is one of the most active volcanoes in Kamchatka. Since August 1980 to the present time, an extrusive dome has been growing in the crater of the volcano. Plastic lavas in the form of large ribbons were noted on the dome already in 1980–1981, the first lava flow was observed after a paroxysmal eruption on May 9, 2004. The next large block of lava started to extrude in the end of April – beginning of May 2020. By June, 11th, it rose above the dome on 50–80 m, and up to 120 m by the end of October. On September 28, it was noted that the lava block acquired smooth surfaces. Portions of lava squeezed out from inside of the volcano in August – September were plastic. By December 8, the block had collapsed. In February 2021, a new block of plastic lava began to rise from the destroyed block. In March its height above the dome exceeded 50–60 m, and 200 m in June.

В 2006 г. в рамках проекта KVERT, главной задачей которого является снижение вулканической опасности для авиации в северной части Тихого океана, проводились наблюдения за действующими вулканами Камчатки и островов Атласова и Парамушир Северных Курил. В 2006 г. три вулкана Камчатки представляли опасность для авиаперевозок. На вулкане Карымский в течение года продолжалось умеренное эксплозивное извержение, начавшееся 1 января 1996 г. На вулкане Безымянный 9 мая и 24 декабря произошли сильные пароксизмальные извержения с подъемом эруптивных колонн до 15 км над уровнем моря. На вулкане Шивелуч с 4 декабря начали происходить отдельные пепловые выбросы на высоту до 10 км над уровнем моря, а 27 декабря в течение суток непрерывно наблюдалась эксплозивная активность вулкана с подъемом пепловых облаков до 4-6 км над уровнем моря. На вулкане Ключевской в декабре отмечались некоторое повышение сейсмической активности и слабая термальная аномалия. На вулканах Авачинский, Мутновский (Камчатка) и Эбеко (о. Парамушир, Северные Курилы) наблюдалась повышенная фумарольная деятельность.

Resuspended ash is common in the areas of active volcanism and can be dangerous for ecosystems, human being and animals, different means of transport including local aviation. According to KVERT scientists data, a formation of resuspended ash plumes on Kamchatka occurs in the area of Sheveluch volcano annually, mainly from August to mid-October within two days. For example, these plumes observed on August, 3, 2011, September, 15–16 and October, 3–4, 2015, September, 28–29 and October, 2–4, 2016. Dense ash plumes rising 3 km above the surface to a.s.l. and 16–22 km in width drifted 600 km to the south-east from the volcano. Analysis of various satellite data in the VolSatView information system revealed typical features of Sheveluch resuspended ash plumes. The largest concentration of ash particles is observed in ash plumes at a distance of 60–70 km from the volcano; its width on the land for over 100 km reaches 16–22 km and is 1–2 km thick from the earth’s surface; a wide ash-rich plume is retained in the atmosphere from 3–5 hours to several days.