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Learn More 🟪 Gabe also collected more information. These notes record details he learned from two other sources.
from “What is a supervolcano?” (USGS)
— has had eruption of magnitude 8 on the Volcano Explosivity Index (VEI)
— has ejected more than 240 cubic miles of material
— Toba had the biggest eruption, followed by two at Yellowstone. (Include public domain graphic.)
from “How dangerous are supervolcanoes?” (NatGeo)
— California’s Long Valley, Japan’s Aira Caldera, Indonesia’s Toba, and New Zealand’s Taupo
— some form on hotspots, some subduction zones
— 1815 explosion of Mount Tambora caused “Year Without a Summer” with crop failure and famine
Create a Focus 🟪 Next, Gabe wrote a sentence that focused on the central idea of his essay. (He knew his focus might change as he worked.)
Visitors to Yellowstone National Park stand inside a supervolcano.