Chikurachki volcano is located in the northern part of the Karpinsky Ridge on Paramushir Island of the Northern Kuriles. Its eruptive activity is represented by explosive (vulcanian type) and explosive-effusive moderate eruptions; its rock composition is basaltic andesites. Information about fifteen historical eruptions of the volcano is known. The paper describes the eruption in January-February 2022 based on the study of various satellite data in the information system “Remote monitoring activity of Kamchatka and the Kuriles volcanoes” (VolSatView, http://kamchatka.volcanoes.smislab.ru). The explosive eruption continued for three days, the explosions raised ash to 5.5 km above sea level, and ash plumes moved for 260 km mainly to the west, southwest, and southeast of the volcano. The total area of ash falls during the eruption exceeded 28 thousand km2, including 640 km2 on land. Volcanic activity was dangerous for low-flying aircraft.

Krasheninnikov is an active volcano in the Eastern Volcanic Belt of Kamchatka. According to tephrochronological data, the last explosive eruption of the volcano was 1100 years ago, and the effusing of lava flows and the formation of a cinder-lava cone in the crater of the Northern Cone of the volcano occurred 400–600 years ago. According to satellite data from the information system “Remote monitoring of the activity of volcanoes in Kamchatka and the Kuril Islands” (VolSatView, http://volcanoes.smislab.ru), the first historical eruption of the volcano began at 16:38 UTC on August 2, 2025. The paper presents the first results of the study of the eruption during August 2–16, 2025. During this time, in the satellite images, there were constantly observed in the area of the volcano a large thermal anomaly and ash plumes that stretched for hundreds of kilometers in different directions from the volcano. As of August 12, the length of each of the three lava flows that effused from August 2 to 12 on the northwestern and eastern slopes of the Northern Cone was about 3 km, the total area of the lava flows reaching 2.7 km2. The eruption of Krasheninnikov Volcano continues.

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.

Close cooperation between researchers at the Alaska Volcano Observatory, USA, the Institute of Volcanic Ge-ology and Geochemistry, Far East Division, Russian Academy of Sciences, and the Kamchatkan Experimental and Methodical Seismological Department, Geophysical Service, Russian Academy of Sciences within the framework of the aviation flight safety program carried out by KVERT (the Kamchatkan Volcanic Eruption Response Team) resulted in a successful forecast of the Bezymianny eruption, all organizations concerned be-ing warned before the event. We describe the precursory phase and evolution of this explosive eruption, as well as its products. The explosive phase lasted one day, the effusive one during about a month. The eruption pro-duced a block and ash pyroclastic flow of merapi type on the volcano's slope and a viscous lava flow on the slope of its dome. The Volcanic Explosivity Index (VEI) is about 2.

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.