<A HREF="mailto:kg5qd@earthlink.net"> Dale Huguley</A> reports via APRS mailing list... "Popo" Volcano near Mexico City is acting up and may pose a threat the the 20 million or so people that live in the Valley of Mexico. I am now parsing Volcanic Ash Advisories and will plot the location of the offending volcano... The closest icon I could find is the "smoke" icon. Plotting the trajectory in APRS presents an interesting problem- as a vector it would cause the volcano to move with dead reckoning turned on (!). As a weather object it would show 180 out of phase- wind is shown by where it is coming from- ash is going somewhere. There is a great link at : <A HREF=" http://www.cenapred.unam.mx/popo/UltimaImagenVolcan2.html"> www.cenapred.unam.mx</A> live pictures of Popo during daylight (really nice sunsets!) Following is an Ash Advisory: FVXX21 KWBC 020652 VOLCANIC ASH ADVISORY ISSUED 0700 UTC 02 NOV 2000 BY THE WASHINGTON VAAC POPOCATEPETL 00-102 MEXICO 1901N 9837W BACKGROUND: POPOCATEPETL MEXICO (1401-09) SUMMIT HEIGHT 17930 FT (5465 M) SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. MEXICO CITY MWO. CENAPRED REPORT. ERUPTION DETAILS: SERIES OF ERUPTIONS BEGINNING APPROXIMATELY 01/2315 UTC THROUGH 02/0006 UTC DETAILS OF ASH CLOUD: ASH FROM THE PREVIOUS EMISSIONS WAS NOT DETECTED ON SATELLITE IMAGERY THROUGH 02/0615 UTC AND HAS DISSIPATED. THE MEXICO CITY MWO RELAYED THAT CENAPRED HAD REPORTED THAT THE VOLCANO HAS HAD NO ACTIVITY SINCE 02/0006 UTC. TRAJECTORY: N/A OUTLOOK: SEE SIGMETS. THIS WILL BE THE LAST ADVISORY FOR THIS EVENT. REAL TIME SATELLITE IMAGERY AND VOLCANIC ASH ADVISORIES OFTEN ACCOMPANIED BY A MAP DEPICTING ASH LOCATION ARE AVAILABLE AT INTERNET URL ADDRESS <A HREF="http://www.ssd.noaa.gov/VAAC/washington.html"> WWW.SSD.NOAA.GOV/VAAC</A> PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. CLARK 73 de kg5qd Dale
