Revision History for U.S. Geological Survey Open-File Report 2013–7412
By Larry Mastin, Michael J. Randall, Hans F. Schwaiger, and Roger P. Denlinger

User’s Guide and Reference to the Web Interface of Ash3d—A Three-Dimensional Model for Atmospheric Tephra Transport and Deposition
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Posted online August 23, 2013

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Revised and reposted April 2021

Cover image has been updated.
The "Introduction" has been rewritten.
Figure 1, page 2. Figure has been replaced.
Figure 2, page 3. Figure has been replaced.
"The Web Interface" section has been rewritten.
Figure 3, page 4. Figure has been replaced.
Figure 4, page 5. Figure has been replaced.
Figure 5, page 6. Figure has been added.
Figure 6, page 6. Figure has been added.
Figure 7, page 7. Figure has been added.
Figure 8, page 8. Figure has been added.
Figure 9, page 9. Figure has been replaced.
Figure 10, page 10. Figure has been replaced.
Table 1, page 11. Simulation Type column has been updated.
Table 1, page 11, row "deposit_thickness_mm.txt." The text "The rows are ordered from south to north." was added.
The "Model Output Files" section has been rewritten.
Figure 11, page 12. Figure has been replaced.
Figure 12, page 13. Figure has been replaced.
Figure 13, page 14. Labels have been changed from numbers to letters.
Figure 14, page 15. Figure has been replaced.
Figure 15, page 16. Figure has been replaced.
Figure 16, page 16. Labels have been changed from numbers to letters.
Figure 18, page 18. Figures label has been made upper case.
The "Modeling from the Command Line" section has been removed.
References were updated.
Appendix: Example Ash3d input file, page 25. The "shape factor f" was added to the number of settling velocity groups.
Appendix: Example Ash3d input file, page 25. The values in the fourth column of the Block 7 text was revised.