FVXX20 KNES 211814 VA ADVISORY DTG: 20180721/1814Z VAAC: WASHINGTON VOLCANO: REVENTADOR 352010 PSN: S0005 W07740 AREA: ECUADOR SUMMIT ELEV: 11686 FT (3562 M) ADVISORY NR: 2018/694 INFO SOURCE: GUAYAQUIL MWO. ERUPTION DETAILS: VA EM AT 21/1750Z. 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