A moderate Vulcanian type explosive eruption of Chikurachki volcano lasted from 28 till 31 March, 2016. Explosions sent ash up to 4 km above sea level, ash plumes drifted for about 600 km mainly to the southeast from the volcano, but also to the northeast, south and southwest from it. The largest area of the ash plume – up to 13 676 km2 – was detected on 30 March. During the eruption of Chikurachki volcano, the eruptive activity of Alaid volcano, which has been in the state of weak explosive eruption from 01 October 2015 till present, increased,. Ash plumes of Alaid volcano extended for about 60 km from 29 March till 01 April. To observe the eruptions we used mainly satellite images of medium resolution of the information system "Monitoring of volcanic activity in Kamchatka and the Kurile Islands" (VolSatView).

Вулкан Ключевской — один из наиболее активных вулканов мира. В 2019–2021 гг. произошло два вершинных эксплозивно-эффузивных извержений вулкана с перерывом в 88 дней. 17 февраля 2021 г., спустя 9 дней после окончания вершинного извержения, на высоте 2,8 км н. у. м. на северо-западном склоне вулкана появился боковой прорыв. Его обнаружение произошло благодаря непрерывному мониторингу вулкана с помощью спутниковых данных низкого, среднего и высокого разрешения, доступных в информационной системе «Дистанционный мониторинг активности вулканов Камчатки и Курил» (VolSatView, http://kamchatka.volcanoes.smislab.ru). Термальная аномалия в районе прорыва была обнаружена по спутниковым снимкам среднего разрешения, подтверждение извержения выполнено по снимкам высокого разрешения, динамика развития прорыва — по снимкам низкого разрешения (Himawari-8). В районе прорыва образовались две трещины, из которых вытекали лавовые потоки. К 21–22 февраля лавовые потоки начали внедряться в ледник Эрмана. Грязевые потоки от фронтов лавовых потоков по р. Крутенькой прошли в 7 км от пос. Ключи в направлении к р. Камчатке. К 28 февраля нижняя трещина прекратила работу, но извержение бокового прорыва активно продолжается: растёт шлаковый конус, увеличивается площадь лавового поля. Прорыв 2021 г. назван именем чл.-корр. АН СССР Г. С. Горшкова.

There are 36 active volcanoes in Kamchatka and Northern Kuriles, from 3 to 8 volcano eruptions occur here every year. Daily satellite monitoring of volcanoes has been performed by the Kamchatka Volcanic Eruption Response Team (KVERT) since 1997 in cooperation with colleagues from the Alaska Volcano Observatory (USA). Since 2002, KVERT scientists have processing and analyzing primary images of satellite systems NOAA (AVHRR), TERRA and AQUA (MODIS), etc. in close–to–real time to detect ash plumes and thermal anomalies on active volcanoes. The multiparameter analysis of the available published information about volcanoes, as well as visual and satellite data obtained by KVERT scientists during 24 years of daily monitoring of volcanic activity, made it possible to identify the main features of the activity at each of the active volcanoes and assess their degree of danger for air transportation and population of the peninsula. With the creation in 2011 of the information system “Remote monitoring activity of volcanoes of Kamchatka and the Kuriles (VolSatView)”, volcanologists opportunity have the opportunities that have no analogues in the world to conduct satellite observations of active volcanoes. VolSatView combines a wide range of data from various satellite systems coming from different sources and allows us to process operational and retrospective satellite information directly in the web–interface by means of specially created tools, to compare it with video information, to simulate ash plumes propagation, to classify various volcanogenic objects and etc. VolSatView enables to solve problems at different levels — from on–line monitoring of volcanoes activity to the fundamental problems in volcanology. The character of volcanic activity changes and the actuality of solving the problem of “how the volcano works” remain. To accomplish this task and for searching precursors of explosive volcanic eruptions, it is necessary to continue long–term remote observations of the volcanoes in the region; to study changes in their activity with time; to compare behavior of volcanoes supplying the eruptive products of similar and contrast compositions to the earth surface.