The flat-topped summit of the central cone of Ebeko volcano, one of the most active in the
Kurile Islands, occupies the northern end of Paramushir Island. Three summit craters located
along a SSW-NNE line form Ebeko volcano proper, at the northern end of a complex of five
volcanic cones. Blocky lava flows extend west from Ebeko and SE from the neighboring
Nezametnyi cone. The eastern part of the southern crater of Ebeko contains strong solfataras
and a large boiling spring. The central crater of Ebeko is filled by a lake about 20 m deep
whose shores are lined with steaming solfataras; the northern crater lies across a narrow, low
barrier from the central crater and contains a small, cold crescentic lake.
Historical activity, recorded since the late-18th century, has been restricted to small-to-
moderate explosive eruptions from the summit craters. Intense fumarolic activity occurs in
the summit craters of Ebeko, on the outer flanks of the cone, and in lateral explosion craters.
Wednesday, April 6th, 2005
The Ebeko volcano that increases its activity in January at the North Kurile island of
Paramushir in the Russian Far East is threatening the city of Severo-Kurilsk situated
just 7 km away, scientists said Wednesday.
A relevant warning has been sent to local authorities
According to the scientist hydrogen sulphide and sulphurous
gas exhaled by the volcano
Beginning 14 October, two vents on a sheer wall of the N crater began ejecting fine ash and
steam to 300 m above the summit. Pulsations of activity occurred 3 or 4 times a day.
Ejections reached 1 km height, with a plume that extended horizontally 10-15 km NE.
Fissures that formed on the outer E flank of the crater emitted steam. No seismicity preceded
or accompanied the ash-steam ejections. The press reported that ash and gas began to be
emitted from the main crater before 2100 on 19 October, and the crater lake was emptied of
water. A 1-km-high ash column formed on 27 October and the next day a small amount of
ash fell on the town of Severo-Kurilsk (a few kilometers away).
No casualties resulted from the eruptions. Additional equipment was installed to monitor the
volcano. Variations in gas composition of near-crater fumaroles were observed 4 years ago,
and an increase in the temperatures of fumarole emissions has been noted since the October
eruption. The press reported that scientists did not rule out the possiblilty of a lahar which
could pose a danger to the S part of Severo-Kurilsk.