(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA) (2) Issued:20230205/2244Z (3) Volcano:Chikurachki (CAVW #290360) (4) Current aviation colour code:ORANGE (5) Previous aviation colour code:orange (6) Source:KVERT (7) Notice Number:2023-21 (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:The explosive activity of the volcano continues. According to satellite data by KVERT, the explosive events of Chicurachki volcano began probably on 15:30 UTC on 05 February, 2023. The explosions send ash up to 4-4.5 km a.s.l., and ash plumes are extending for 90 km to the north and northeast of the volcano. Aerosolic clouds are observing during these eruptive events. KVERT continues to monitor Chikurachki volcano.\n\nThe explosive 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:4000-4500 m (13120-14760 ft) AMSL Time and method of ash plume/cloud height determination: 20230205/2131Z – NOAA-19 4m5(13) Other volcanic cloud information:Distance of ash plume/cloud of the volcano: 72 km (45 mi)\nDirection of drift of ash plume/cloud of the volcano: ENE / azimuth 70 deg \nTime and method of ash plume/cloud determination: 20230205/2150Z – Himawari-9 14m15(14) Remarks:(15) Contacts:Dr. Olga A. Girina, Head of KVERT, IVS FEB RAS\ngirina@kscnet.ru +74152202044\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.