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Person

Larry G Mastin

Research Hydrologist

Email: lgmastin@usgs.gov
Office Phone: 360-993-8925
Fax: 360-993-8980
ORCID: 0000-0002-4795-1992
Files in this folder include: phase1 and phase2: directories containing input and output for the two simulations that were combined (from phase 1 and phase 2 of the eruption) to generate the deposit file displayed in Fig. 6c. DepositFile_ESRI_ASCII.txt A gridded file in ESRI ASCII format, containing the mass load in kg/m2 throughout the model domain from the combined phase-1 and phase2 eruptions. Header lines in the file indicate the (1) number of rows, (2) number of columns, (3) longitude of the lower left corner (i.e. the cell center of the lower left cell), (4) latitude of the lower left corner, (5) the cell spacing in dx and dy respectively, and (6) the no-data value. Data are written in 10f10.3...
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This data release contains results of model simulations of a plume at Kilauea volcano that occurred on 20 December 2020. The ash-poor plume was produced when lava flowed into a water lake at the summit of Kilauea volcano. Simulations were conducted to constrain the conditions under which the plume rose to its observed height. The analysis and results are described in the accompanying paper: Cahalan RC, Mastin L, Van Eaton A, Hurwitz S, Smith AB, Dufek J, Solovitz SA, Patrick M, Schmith J, Parcheta C, Thelen W, Downs DT (2023 (in press)) Dynamics of the December 2020 ash-poor plume formed by lava-water interaction at the summit of Kīlauea Volcano, Hawaiʻi. Geochemistry, Geophysics, Geosystems.
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Files in this folder include: ash3d_input.inp The input file used in the Ash3d simulation that produced Figure 2c. Format of the input is as described in Mastin et al. (2013). CloudLoad_hhh.hhhrs.dat A series of files, in ESRI ASCII format, containing the cloud mass load at different times in the simulation, indicated by "hhh.hh" in the filename, where "hhh.hh" are the decimal number of hours since the eruption start. These are gridded data of cloud mass load in g/m2. Header lines in the file indicate the: (1) number of rows, (2) number of columns, (3) longitude of the lower left corner (i.e. the cell center of the lower left cell), (4) latitude of the lower left corner, (5) the cell spacing in dx...
Files in this folder include: ash3d_input.inp The input file used in the Ash3d simulation that produced Figure 2c. Format of the input is as described in Mastin et al. (2013). CloudLoad_hhh.hhhrs.dat A series of files, in ESRI ASCII format, containing the cloud mass load at different times in the simulation, indicated by "hhh.hh" in the filename, where "hhh.hh" are the decimal number of hours since the eruption start. These are gridded data of cloud mass load in g/m2. Header lines in the file indicate the: (1) number of rows, (2) number of columns, (3) longitude of the lower left corner (i.e. the cell center of the lower left cell), (4) latitude of the lower left corner, (5) the cell spacing in dx...
CONTENTS OF THIS DATA RELEASE This data release contains supplementary material to the Geochistry, Geophysics, Geosystems article: "Modeling ash dispersal from future eruptions of Taupo supervolcano", by S.J. Barker et al. This paper uses Ash3d model simulations to calculate the probability of tephra inundation from eruptions of the following sizes: 0.1 km3, 1 km3, 5 km3, 50 km3, and 500 km3. All volume cases were modeled with umbrella cloud formation, with additional Ash3d simulations also run for the case of a 0.1 km3 eruption assuming no development of an umbrella cloud. One thousand model simulations were run for each of these cases. Other source parameters used for these simulations are described in the...
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