The Troynoy (Triple) geyser was one of the largest geysers in the Valley before the 2007 landslide (Leonov, 2017). It was located on the left bank of a warm creek flowing into the Geysernaya River, 10 m above the level of this creek. On the right bank of this creek, opposite the Troynoy Geyser, were located geysers Sakharny and Sosed. It was first described and named by T.I. Ustinova, who considered this geyser as "the second largest geyser in Kamchatka" (Ustinova, 1955). The geyser received its name for the number of griffins located in the upper part of its geyserite shield. The Troynoy Geyser had the most beautiful and largest geyserite edifice (its area was more than 100 sq.m) in the Valley of Geysers. Description of the eruptions of the Troynoy geyser by Ustinova: “The geyser’s griffins, having one common channel at depth, boiled simultaneously. But each griffin had its own outlet channel. The stream of water from the middle griffin hit at an angle of about 60° for a distance of 20 m.” (Ustinova, 1955). “Eruptions occur simultaneously from 3 griffins, but at different angles, and stops after 7-8 minutes” (Raik, 1963). In the period 1997–2003, when continuous automatic registration of the geyser’s activity took place for several months, 2 levels in its periodicity were recorded: 120–160 minutes and 180–230 minutes. In 2007, a powerful landslide occurred, which completely buried Troynoy and all other geysers on the bank of the Vodopadny creek. The thickness of the landslide deposits above the Troynoy geyser is more than 40 m (Dvigalo et al., 2009). A lake formed above the place where Troynoy and other geysers located (Droznin, 2007).
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.  Двигало В.Н., Мелекесцев И.В. Геолого-геоморфологические последствия катастрофических обвальных и обвально-оползневых процессов в Камчатской Долине Гейзеров (по данным аэрофотограмметрии) // Вулканология и сейсмология. 2009. № 5. С. 24-37. Дрознин В.А., Селиверстов Н.И. Долина Гейзеров после геологической катастрофы // Вестник КРАУНЦ. Серия: Науки о Земле. 2007. № 2. С. 7-8. Райк А.А. О режиме гейзеров Камчатки / Исследование природы Дальнего Востока. Таллин: Академия наук Эстонской ССР. 1963. С. 39-90. Устинова Т.И. Камчатские гейзеры / Отв. ред. Рихтер Г.Д., Никольская В.В. М.: Географгиз. 1955. 119 с.  |
