Brad Jackson
Dear Brad,
http://www.geo.mtu.edu/volcanoes/mexico/popocatepetl/updates/update.010.html
However, it doesn't mention access to the volcano. There is an e-mail address for Dr. Hugo Delgado-Granados, who wrote the report. It is:
hugo@tonatiuh.igeofcu.unam.mx
I would imagine that since Popocateptl is in the northern hemisphere that during the northern-hemisphere winter is the best time to find lots of snow. I guess it's possible that there is sometimes too much snow and the road is closed.
Scott Rowland, University of Hawaii
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