FVXX20 KNES 010341 VA ADVISORY DTG: 20110201/0341Z VAAC: WASHINGTON VOLCANO: POPOCATEPETL 1401-09 PSN: N1901 W09837 AREA: MEXICO SUMMIT ELEV: 17802 FT (5426 M) ADVISORY NR: 2011/001 INFO SOURCE: MEXICO CITY MWO. GOES-13. ERUPTION DETAILS: BRIEF ERUPTION AT 0255Z TO FL260 MOVG NE 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