Chris Newhall proposed a qualitative scale that assigns a value between "0" and "8" inclusive for these occurrences.
Chris Newhall proposed a qualitative scale that assigns a value between "0" and "8" inclusive for these occurrences. The largest of these events on that scale in the past tens of thousands of years is the "Oruanui" (OR-oo-uh-new-ee) one. Stephen Ambrose suggested that one of these events in Toba is linked with a genetic bottleneck. When one of these events occurs underneath a glacier, a dangerous flood called a jokulhlaup (YOH-kull-ayupp) may occur. The (*) "phreatic" type of these events can create formations called maars. Pliny the Elder gives his name to a type of these events, which can eject namesake "bombs." Lapilli and other tephra may be ejected during these events, which can create deadly pyroclastic flows. For 10 points, name these disasters in which a volcano spews lava.
Chris Newhall proposed a qualitative scale that assigns a value between "0" and "8" inclusive for these occurrences.
volcanic eruptions [accept phreatic eruption or Plinian eruption]