(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA) (2) Issued:20210111/0418Z (3) Volcano:Sarychev Peak (CAVW #290240) (4) Current aviation colour code:YELLOW (5) Previous aviation colour code:green (6) Source:KVERT (7) Notice Number:2021-07 (8) Volcano Location:N 48 deg 5 min E 153 deg 12 min (9) Area:Central Kuriles, Russia (10) Summit Elevation:4906.88 ft (1496 m)(11) Volcanic Activity Summary:Activity of Sarychev Peak volcano increased: according to the NPP(VIIRS, ch 4) satellite data from the VolSatView IS, at 15:17 UTC on 10 January, the difference between the temperatures of the anomaly and the background was 79.8 ° С. Perhaps a new lava has appeared in the crater of the volcano. Ash explosions could occur at any time. According to satellite data, ash explosions up to 4.5 km a.s.l. were noted last time on 12, 14, and 18 September, 2018. KVERT continues to monitor Sarychev Peak volcano.\n\nA moderate gas-steam activity of the volcano continues. Ash explosions up to 32,800-49,200 ft (10-15 km) a.s.l. could occur at any time. Ongoing activity could affect international and low-flying aircraft. (12) Volcanic cloud height:NO ASH CLOUD PRODUSED(13) Other volcanic cloud information:NO ASH CLOUD PRODUSED(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.