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no low non-zero SA values in bedrock_SA_[return period] files #94

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
When doing National Hazard map runs Mark E. has noticed that there does not 
seem to be SA values between 0.0003 and 0.0.  He was looking at a return period 
of 500 years.

What steps will reproduce the problem?
Hard to reproduce the problem, since it is an absence of values.
I had a look in some SA return period files in the implementation tests and I 
didn't find any 0.0 or below 0.0003 values

What is the expected output? What do you see instead?

Original issue reported on code.google.com by duncan.g...@gmail.com on 4 Oct 2012 at 6:24

GoogleCodeExporter commented 9 years ago 
Try to reproduce by having a probabilistic scenario with small EQ's, looking at 
small return periods.

Original comment by duncan.g...@gmail.com on 4 Oct 2012 at 6:26

GoogleCodeExporter commented 9 years ago 
\trunk\eqrm_core\misc_scripts\issue_94 - is a simulation investigating the 
issue.  With this simulation SA's of 0.00014 are observed, bedrock, rp 3.984. 
Going to rp 3.983 gives SA's of 0.  So there is a sharp cut-off point.  I can't 
tell if this is an implementation or scientific problem.

Original comment by duncan.g...@gmail.com on 4 Oct 2012 at 7:08

GoogleCodeExporter commented 9 years ago 
\trunk\eqrm_core\misc_scripts\issue_94 revision 1285 produces low SA's - (e.g.  
2.494378295e-06), return period 7.  I dropped the minimum magnitudes to get low 
SA's.

Original comment by duncan.g...@gmail.com on 5 Oct 2012 at 12:16