Ebeko – Volcanoes of the world
Ebeko − active complex stratovolcano type Somma-Vesuvius, located in Northern Paramushir island. Seven kilometers North-West from Severo-Kurilsk. A volcano is a mountain system of Great Kurile ridge, Vernadsky ridge.
Ebeko has founded 2400 years ago. The volcano is composed of ANDESITES and andesite-basalts. The height of the top Ebeko is 1156 meters. Its Somma, whose diameter is three to five kilometers, destroyed. It surrounds the crest of semi-annular elongated in Meridian direction of the Central cone of the volcano, with the top three adjoining crater with depths of from seventy to one hundred meters and diameters from two hundred fifty to three hundred and fifty meters. Craters filled with hot lakes, sulphur, thermal springs. Many lateral craters of the volcano − explosive craters and cirques are also the centers of hydrothermal and fumarole activity.
Until the mid-sixties of the 20th century, the lake in the Central crater of Ebeko volcano is heated by underground springs. However, after the eruption of 1965, the flow of warm water from the bowels of the volcano ceased. As a result, the water level in the lake fell by eleven meters. The water is gradually beginning to cool. Nowadays this lake feeds water melting snowfield, located near the volcano
Ebeko is characterized by high volcanic activity, it is one of the most active volcanoes in the Kuril Islands. The first recorded eruption of this volcano occurred in 1793. Then Ebeko has erupted eight times (in 1859, 1934-1935, 1963, 1967, 1987-1990, 1998, 2007, 2009 years). During the eruption of 1859 sulfuric cloud covered the neighbouring volcano island of Shumshu. As a result among the local population, there have been numerous cases of poisoning by sulfur dioxide.
In the late 50’s – early 60-ies of the employee of the Geological Institute of the Academy of Sciences of the USSR K. Selenuim analysis was conducted of the water flowing out of the crater of Ebeko. Studies in water revealed a large content of manganese, aluminum and iron. According to scientists, the river flowing down the slope of the volcano, takes in the sea of Okhotsk every day 35 tons of dissolved iron and 65 tons of aluminum. During periods of activity, this volcano emits into the air such toxic substances as chlorine, sulfur, arsenic compounds, and boron.