of about one inc raveled over it, so t today it is directly under nort yoming. (t spot itselfstays in one place, like an acetylene torc a ceiling.) In its  leaves t ofric are ideal for groatoes, as Idas like to joke, Yelloone eppingaround geysers.

    t Yelloone eruption covered all or parts of nineteen ernstates (plus parts of Canada and Mexico)—nearly ted States  of t of America, an area t produces roug is  like a big sno  in ted to grooput all t took t monto clear 1.8 billion tons of debrisfrom teen acres of trade Center site in Ne ake to clear Kansas.

    And t’s not even to consider tic consequences. t supervolcano eruptionon Eart toba, in nortra, seventy-four te   it obablast  least six years of “volcanic er” and goodness kno. t, it is t, may  to tinction, reducing tion to no more t means t all modern ion base,y. At all events, tosuggest t for t ty total number of people on Eart any time. t is, needless to say, a long time to recover from asingle volcanic blast.

    All tically interesting until 1973, ous: er in Yelloone Lake, in t of to run overt t te end of ter mysteriously flos did a y survey and discovered t a largearea of ting up one end of ter to run out at ted one side of a cral region of t   formallysurveyed. tral part of t incnoo be swelling again.

    ts realized t only one tless magma chamber.

    Yelloone  te of an ancient supervolcano; it e of an active one. It  about time t to  t tone’seruptions averaged one massive blo one, interestingly en