Revision History for Scientific Investigations Report 2007-5276

Julia P. Griswold and Richard M. Iverson

Mobility Statistics and Automated Hazard Mapping for Debris Flows and Rock Avalanches

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Posted online May 1, 2008

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Revised and reposted April 24, 2014, version 1.1 


Errors in three records for rock avalanches have been corrected.  One error was a simple 
typo--one too many zeros. For Mount Adams 1921 rock avalanche, the planimetric area 
should have been recorded as 400,000 and not 4 million. The other errors come from 
unpublished data that are now published in the scientific literature. The two events 
concern Jonas Creek in the Canadian Rocky Mountains. It has been communicated to us that 
the previously published estimates of flow volume and inundated area were miscalculated 
and corrected values were provided. In all three cases, the corrected values represent 
an order of magnitude shift and affect the appearance of figure 3. The shift in values 
will affect the statistics of the group in some minor way. The correction to those data 
are manifest on figure 3 (page 8), appendix A entries RA 134, RA 139, and RA 140 (page 47), 
and appendix B (page 59).  At this time (April 2014), these revisions are not carried 
through the statistical tables (tables 3, 4, 5, 7, 9, 10, 11, 13, 14, 16) and data plots 
(figures 6, 7, 8, 10, 13).  This statistical work, along with the addition of new data 
published in the literature since 2007, will be added to make the dataset more robust as 
time permits in the future. The authors judge that these data corrections (April, 2014) 
should not significantly change the outcome of the findings in the original SIR or to 
the set of calibrated mobility equations established for rock avalanches.