Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2019, Vol. 16, No. 3, pp. 303-307
Raikoke volcano eruption on 21 June 2019
O.A. Girina
1 , E.A. Loupian
2 , I.A. Uvarov
2 , L.S. Kramareva
3 1 Institute of Volcanology and Seismology FEB RAS, Petropavlovsk-Kamchatsky, Russia
2 Space Research Institute RAS, Moscow, Russia
3 Far-Eastern Center of State Research Center for Space Hydrometeorology “Planeta”, Khabarovsk, Russia
Accepted: 03.07.2019
DOI: 10.21046/2070-7401-2019-16-3-303-307
Raikoke stratovolcano is located in the Central Kuril Islands, with a height of 551 m (or 2500 m from the bottom of the sea), it has a crater on its peak with a diameter of 700 m and a depth of 200 m, the composition of its rocks is andesites. The island-volcano Raikoke together with the underwater volcano 3.18 is a single volcanic massif of 19×8 km in size, the distance between their peaks is about 7 km. The relative height of the underwater volcano from the bottom of the sea is about 900 m, its top is at a depth of about 250 m, the composition of the rocks of the underwater volcano is andesibasalts and andesites. There were only two known strong eruptions of Raikoke: in 1778 and on 15 February 1924. The current explosive eruption of Raikoke volcano began at 18:05 GMT on 21 June 2019. The first message about the eruption was transmitted by Tokyo VAAC; the information about the development of the eruption based on various satellites was obtained by us using the information system “Remote monitoring of the activity of volcanoes of Kamchatka and the Kuriles (VolSatView)”. According to the Himawari-8 satellite data (http://volcanoes.smislab.ru/animation/1561927182.webm), the main phase of the eruption began with a series of large explosions that raised ash to 10–13 km above sea level, and lasted about 15 hours, forming a powerful eruptive cloud moving over 2500 km North-East from the volcano. On 30 June, the aerosol clouds from Raikoke were observed at distances from the volcano: 3100 km (Novosibirsk Islands), 3500 km (Lake Baikal), about 5500–6000 km (Northwest Canada). A detailed analysis of satellite information suggested that on 24–25 June a lava flow began to pour out on the western slope of Raikoke. It is also possible that during the eruption of Raikoke, the underwater volcano 3.18 also erupted.
Keywords: volcano, eruption, Kuril Islands, satellite monitoring, VolSatView, information system, Earth remote sensing
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