The boiling spring Sosed (Neighbour) was located at the base of the geyserite shield of the spring Sakharny (Sugary). It had an opening measuring 1 x 0.5 m and erupted to a height of 5–6 m. It was first described by T. I. Ustinova (1955). The geyser cycle was irregular — from 3 minutes to 1 hour 40 minutes, the eruption lasted 1–3 minutes. Observers noted a connection between the activity of Sosed and Troinoy (Tripple). “After the eruption of Troinoy, Sosed usually does not erupt for about 1 hour. The first eruptions are quite weak and have relatively large intervals, but then the intensity of Sosed increases as the eruption of Troinoy approaches. Intervals can be reduced to 5 minutes” (Bryan, 1991). On June 3, 2007, it was buried under the thick landslide deposits (Leonov, 2017).
References
Bryan S.T., Hobart J., Warnock B., Rinehart J.S., Fenimore M., Colvin B. The Geysers of 'The Valley of Geysers'. A special report of GOSA Transactions. USA, California: B&J Printing. 1991. 60 p.  Леонов А.В. Каталог гейзеров Кроноцкого заповедника. Долина гейзеров и кальдера вулкана Узон: история и современность. М.: Изд-во ООО «Реарт». 2017. 384 с. Сугробов В.М., Сугробова Н.Г., Дрознин В.А., Карпов Г.А., Леонов В.Л. Жемчужина Камчатки – Долина Гейзеров, научно-популярный очерк, путеводитель / Отв. ред. Поляк Б.Г. Петропавловск-Камчатский: Изд-во «Камчатпресс». 2009. 108 с. Устинова Т.И. Камчатские гейзеры / Отв. ред. Рихтер Г.Д., Никольская В.В. М.: Географгиз. 1955. 119 с.  |
