stopped. It’s been silent ever since. Some volcanologists t it isrectle . But nobody knows.”

    “And  if Yelloone o go?”

    time it bleand possibly some cterns of beeam vents, butnobody really knows.”

    “So it could just blo warning?”

    fully. trouble,  nearly all t itute  in some measure at Yelloone. “Eartions, but ts of eart year. Most of too small to be felt, but theless.”

    A ctern of geyser eruptions migaken as a clue,  too vary unpredictably. Once t famous geyser in tused to erupt regularly and spectacularly to s of t, but in 1888 it juststopped. t erupted again, to a  of eig. SteamboatGeyser is t geyser in t bloer four  intot tervals bets eruptions tle as four days to almostfifty years. “If it bleoday and again next   tell us anyt all about miger or ty years from now,” Doss says.

    “tile t it’s essentially impossible to draanyt happens.”

    Evacuating Yelloone s some tors ayear, mostly in tively fe intentionally narroly to sloraffic, partly to preserve an air ofpicturesqueness, and partly because of topograpraints. At t of summer, itcan easily take o cross to get anyop, bison jams. e get wolf jams.”

    In tumn of 2000, representatives from tional ParkService, along  and formed sometoneVolcanic Observatory. Four sucence already—in on—but oddly none in t volcanic zone in t actually a t more an idea—an agreement to coordinate efforts at studying andanalyzing t tasks, Doss told me, o draion in t of a crisis.

    “t one already?” I sa