(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA) (2) Issued:20230131/2140Z (3) Volcano:Chikurachki (CAVW #290360) (4) Current aviation colour code:ORANGE (5) Previous aviation colour code:orange (6) Source:KVERT (7) Notice Number:2023-18 (8) Volcano Location:N 50 deg 19 min E 155 deg 27 min (9) Area:Northern Kuriles, Russia (10) Summit Elevation:1816 m (5956.48 ft)(11) Volcanic Activity Summary:An eruptive activity of the volcano continues. Satellite data showed an ash plume extended about 35 km to the north-east of the volcano.\n\nAn activity of the volcano continues. Ash explosions up to 6 km (19,700 ft) a.s.l. could occur at any time. Ongoing activity could affect low-flying aircraft. (12) Volcanic cloud height:3500 m (11480 ft) AMSL Time and method of ash plume/cloud height determination: 20230131/2050Z – Himawari-9 14m15(13) Other volcanic cloud information:Distance of ash plume/cloud of the volcano: 35 km (22 mi)\nDirection of drift of ash plume/cloud of the volcano: ENE / azimuth 76 deg \nTime and method of ash plume/cloud determination: 20230131/2050Z – Himawari-9 14m15(14) Remarks:(15) Contacts: Dmitry V. Melnikov, IVS FEB RAS\ndvm@kscnet.ru \n\nDuty scientist: +79622825253 (16) Next Notice:A new VONA will be issued if conditions change significantly or the colour code is changed. VONAs are posted at http://www.kscnet.ru/ivs/kvert/.\n\nIn Russia, KVERT, on behalf of the Institute of Volcanology and Seismology (IVS) FEB RAS, is responsible for providing information on volcanic activity to international air navigation services for the airspace users.