title: Earth Tremors Generated by Old Faithful Geyser.
abstract: Several types of earth tremors that could be associated with the eruption cycle of Old Faithful Geyser were registered by a seismograph placed a few meters from the geyser's orifice. Each tremor type was indicative of a specific geyser action. A totally unexpected result was an observed bimodal distribution in frequency of the interval between eruptions.
authors.forename: J S
authors.initials: JS
authors.lastname: Rinehart