Witnesses described hearing a sound like thunder when the eruption began . TV : ` ` Please help us , '' cries a father seeking information on his missing son . At least 31 people are found on the mountain in a state of ` ` cardiac arrest , '' police say . Seismologists predict that another big eruption will take place in the coming days . Mount Ontake is erupting Saturday , unleashing a cloud of ash that attracts hikers .
TV : ` ` Please help us , '' cries a father seeking information on his missing son . At least 31 people are found on the mountain in a state of ` ` cardiac arrest , '' police say . Seismologists predict that another big eruption will take place in the coming days . Mount Ontake is erupting Saturday , unleashing a cloud of ash that attracts hikers .