Volcanic hazards and infrastructure
DEVORA: http://volcano.si.edu/
Cities and Volcanoes commission of IAVCEI: http://cav.volcano.info/
International Volcanic Health Hazard Network: http://www.ivhhn.org/
USGS volcanic ash impacts page: http://volcanoes.usgs.gov/ash/
USGS natural hazards gateway: http://www.usgs.gov/hazards/
Auckland Council Civil Defence hazards pages: http://www.aucklandcivildefence.org.nz/Get-Ready/Natural-Hazards/
Natural Hazards Research Platform: http://www.naturalhazards.org.nz/
GNS volcanoes page: http://www.gns.cri.nz/what/earthact/volcanoes/index.html
EQC: http://www.eqc.govt.nz/
GeoNet: http://www.geonet.org.nz/index.html
Global Volcanism Program: http://www.volcano.si.edu/