Volcano scientists issued an alert Wednesday, warning that a cloud of ash — from an eruption more than century ago — was headed toward Alaska's Kodiak Island. The ash is from the powerful 1912 eruption of Novarupta.
Real time measurement of air quality on a public map. Useful to citizen scientists or air quality professionals alike, PurpleAir sensors are easy to install, requiring only a power outlet and WiFi.
Observations From Members 
Novarupta
