We have proposed a static model, a dynamical model and a modified dynamical model of a geyser induced by inflow of gas based on observation and model experiments of it and have also proposed a combined model combining above two models. And numerical simulations of the modified dynamical model or the combined model reappear spouting dynamics of a geyser induced by inflow of gas and it becomes po...

We monitored geyser activity in the Lower Geyser Basin (LGB) of Yellowstone National Park with dual four-element microphone arrays separated by ~600 m. The arrays were independently used to identify incident coherent plane wave energy, then conjoint cross beam back-azimuths from the two arrays were used to precisely locate signal sources. During a week in August 2011 we located repeating infras...

[1] In order to probe the subsurface dynamics associated with geyser eruptions, we measured ground deformation at Old Faithful Geyser of Calistoga, CA. We present a physical model in which recharge during the period preceding an eruption is driven by pressure differences relative to the aquifer supplying the geyser. The model predicts that pressure and ground deformation are characterized by an...

The mechanism behind the intensity oscillations accompanying the flow of solid helium through a micron-sized orifice into vacuum, called the geyser effect, is investigated by measuring the pressure pulses at various locations in the entire flow system. The new results reveal that the source chamber pressure pulses have the same shape as the external detector pulses monitored in the previous exp...

During the period 1973 to 1991 the interval between eruptions from a periodic geyser in Northern California exhibited precursory variations 1 to 3 days before the three largest earthquakes within a 250-kilometer radius of the geyser. These include the magnitude 7.1 Loma Prieta earthquake of 18 October 1989 for which a similar preseismic signal was recorded by a strainmeter located halfway betwe...

Following the 2002 M 7.9 Denali fault earthquake, clear changes in geyser activity and a series of local earthquake swarms were observed in the Yellowstone National Park area, despite the large distance of 3100 km from the epicenter. Several geysers altered their eruption frequency within hours after the arrival of large-amplitude surface waves from the Denali fault earthquake. In addition, ear...

Events that are referred to as geysers have been observed in stormwater or combined sewer systems and are associated with jets of water rising through manholes to a considerable distance above the ground surface. Visual observations suggest that air may be a significant component of the jet. The mechanisms of geyser occurrence have been previously assumed to originate in inertial oscillations t...

The physical model of geyser oscillations presents a challenge to experts, even under relatively simple and clear laboratory circumstances. Despite complex dynamics a qualitative analysis can be made based on video recording and real-time temperature and pressure measurements. The simple experiment with Geyser model is rich with several phenomena from the field of thermodynamics that are includ...

We modified further our extended dynamic model of a geyser induced by an inflow of gas, by taking into consideration the effects during spouting of an elbow shape, pairs of sudden expansions and contractions, and repeats of this shape in an underground watercourse. Through numerical simulations of this extended dynamic model, we see that a large number of sudden expansions and contractions or a...

Dr. Vincent Schaefer Heads New Language Expedition to Yellowstone To Enter State; NoExaminations A scientific expedition to Yellowstone Park, consisting of eight scientists interested in experimental meteorology will be led by Dr. Vincent J. Schaefer of the Science Department at SUCEA. The atmospheric scientists will assemble at Idaho Falls, February 13, and the next day will travel by auto to ...