4 links
CO2 from Mammoth Mt., California
quake.usgs.gov
Observations and interpretations of the carbon dioxide gas emissions at Mammoth Mountain Volcano, Long Valley, California.
Granular Volcano Group
granular-volcano-group.org
Site for understanding granular flows (pyroclastic flows), fluid dynamic, supercomputer modeling, grain features and behaviors in Volcanology, Physics and Geophysics.
Igneous Geochemistry
geokem.com
Compositions of volcanic and other igneous rocks in a world wide data base.
Merapi volcano, Java
ipgp.jussieu.fr
Bibliography, monitoring techniques and photos about one of the most dangerous volcano in the world.