FVXX21 KNES 281854 VA ADVISORY DTG: 20120728/1854Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 PSN: S0128 W07826 AREA: ECUADOR SUMMIT ELEV: 16480 FT (5023 M) ADVISORY NR: 2012/296 INFO SOURCE: PILOT REPORT. ERUPTION DETAILS: PILOT REPORTS INDICATES EMISSION TO FL220 MOV W AT 1800Z RMK: WE HAVE RECEIVED INFORMATION SUGGESTING A POSSIBLE VA EMISSION. WE WILL GATHER FURTHER INFORMATION AND ISSUE A FULL ADVISORY AS SOON AS POSSIBLE. NXT ADVISORY: AS SOON AS POSSIBLE NNNN