FVXX20 KNES 302237 VA ADVISORY DTG: 20180130/2237Z VAAC: WASHINGTON VOLCANO: POPOCATEPETL 341090 PSN: N1901 W09837 AREA: MEXICO SUMMIT ELEV: 17802 FT (5426 M) ADVISORY NR: 2018/068 INFO SOURCE: 557TH WW. MEXICO CITY MWO. SOCIAL MEDIA ERUPTION DETAILS: ERUPTION AT 30/2220Z. 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