Publications
Filter Total Items: 3188
Dissolved volatile concentrations in an ore-forming magma Dissolved volatile concentrations in an ore-forming magma
Infrared spectroscopic measurements of glass inclusions within quartz phenocrysts from the Plinian fallout of the 22 Ma tuff of Pine Grove show that the trapped silicate melt contained high concentrations of H2O and CO2. Intrusive porphyries from the Pine Grove system are nearly identical in age, composition, and mineralogy to the tephra, and some contain high-grade Mo mineralization...
Authors
J. B. Lowenstern
Surface degassing and modifications to vesicle size distributions in active basalt flows Surface degassing and modifications to vesicle size distributions in active basalt flows
The character of the vesicle population in lava flows includes several measurable parameters that may provide important constraints on lava flow dynamics and rheology. Interpretation of vesicle size distributions (VSDs), however, requires an understanding of vesiculation processes in feeder conduits, and of post-eruption modifications to VSDs during transport and emplacement. To this end...
Authors
K. V. Cashman, M. T. Mangan, S. Newman
Stream-channel changes in response to volcanic detritus under natural and augmented discharge, South Coldwater Creek, Washington Stream-channel changes in response to volcanic detritus under natural and augmented discharge, South Coldwater Creek, Washington
No abstract available.
Authors
D. F. Meyer
Russian volcanic eruption disrupts north pacific air traffic: Alaska Volcano Observatory fact sheet Russian volcanic eruption disrupts north pacific air traffic: Alaska Volcano Observatory fact sheet
No abstract available.
Authors
Thomas P. Miller, Vladimir Yu. Kirianov, H. Lee Kelley
Volcanic gas emissions and their impact on ambient air character at Kilauea Volcano, Hawaii Volcanic gas emissions and their impact on ambient air character at Kilauea Volcano, Hawaii
Currently, gas emissions from Kilauea occur from the summit caldera, along the middle East Rift Zone (ERZ), and where lava enters the ocean. We estimate that the current ERZ eruption of Kilauea releases between 400 metric tonnes of SO2 per day, during eruptive pauses, to as much as 1850 metric tonnes per day during actively erupting periods, along with lesser amounts of other chemically...
Authors
A. J. Sutton, T. Elias, R. Navarrete
Hydrologic hazards at Alaska volcanoes?Chakachatna River Basin near Crater Peak, Spurr Volcano Hydrologic hazards at Alaska volcanoes?Chakachatna River Basin near Crater Peak, Spurr Volcano
No abstract available.
Authors
J.M. Dorava, C. F. Waythomas
Multiple flow processes accompanying a dam-break flood in a small upland watershed, Centralia, Washington Multiple flow processes accompanying a dam-break flood in a small upland watershed, Centralia, Washington
On October 5, 1991, following 35 consecutive days of dry weather, a 105-meter long, 37-meter wide, 5.2-meter deep concrete-lined watersupply reservoir on a hillside in the eastern edge of Centralia, Washington, suddenly failed, sending 13,250 cubic meters of water rushing down a small, steep tributary channel into the city. Two houses were destroyed, several others damaged, mud and...
Authors
John E. Costa
Measurements of heat and mass flow from thermal areas in Lassen Volcanic National Park, California, 1984-93 Measurements of heat and mass flow from thermal areas in Lassen Volcanic National Park, California, 1984-93
Rates of heat loss from eight steam-heated thermal areas and one conductively heated thermal area in Lassen Volcanic National Park have been determined from measurements made during the period 1984-93. Total heat discharge at the steam-heated areas is assumed proportional to the rate of steam upflow from underlying reservoirs. The dominant mode of heat loss differs among the areas...
Authors
Michael L. Sorey, Elizabeth M. Colvard
GPS measurements on the island of Hawaii in 1992 GPS measurements on the island of Hawaii in 1992
No abstract available.
Authors
Asta Miklius, E.Y. Iwatsubo, R.P. Denlinger, A.T. Okamura, M. K. Sako, K.M. Yamashita
Stability of submerged slopes on the flanks of the Hawaiian Islands, a simplified approach Stability of submerged slopes on the flanks of the Hawaiian Islands, a simplified approach
Undersea transmission lines and shoreline AC-DC conversion stations and near-shore transmission lines are being considered as part of a system for transporting energy between the Hawaiian Islands. These facilities will need to be designed so that they will not be damaged or destroyed by coastal or undersea landslides. Advanced site surveys and engineering design of these facilities will...
Authors
Homa J. Lee, Michael Torresan, William McArthur