zmap a tool for analyses of seismicity patterns typical applications ...

Table of Content
INTRODUCTION.............................................................................................................. 3
CHAPTER I .......................................................................................................................4
What’s going on with this earthquake catalog? Which parts are useful? What
scientific problems can be tackled?............................................................................. 4
CHAPTER II.................................................................................................................... 14
Are there serious problems with heterogeneous reporting in a catalog? What is
the starting time of the high-quality data? ............................................................... 14
CHAPTER III .................................................................................................................. 22
Measuring Changes of Seismicity Rate..................................................................... 22
Comparing two periods for rate changes .................................................................. 28
Articles in which tools discussed in this chapter were used:.................................... 33
CHAPTER IV................................................................................................................... 34
Measuring Variations in b-value ............................................................................... 34
CHAPTER V .................................................................................................................... 41
Stress Tensor Inversions............................................................................................. 41
Introduction............................................................................................................... 41
Data Format .............................................................................................................. 41
Plotting focal mechanism data on a map .................................................................. 42
Inverting for the best fitting stress tensor. ................................................................ 43
Inverting on a grid..................................................................................................... 44
Plotting stress results on top of topography.............................................................. 46
Using Gephart’s code................................................................................................ 47
The cumulative misfit method .................................................................................. 49
References................................................................................................................. 52
CHAPTER VI................................................................................................................... 54
Importing data into ZMAP........................................................................................ 54
ASCII columns – the most simple way..................................................................... 54
Other options to import your data: Writing your own import filters ........................ 55
CHAPTER VII ................................................................................................................. 57
Tips an tricks for making nice figures ...................................................................... 57
Editing ZMAP graphs............................................................................................... 57
Exporting figures from ZMAP.................................................................................. 60
Working with interpolated color maps ..................................................................... 63
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