Data qualification



In DISS, at each parameter of a seismogenic source a qualifier is added to communicate to users the source of information used to estimate the parameter's value. To this end, we use five qualifiers:

  1. LD for Literature Data;
  2. OD for Original Data;
  3. ER for Empirical Relationship;
  4. AR for Analytical Relationship;
  5. EJ for Expert Judgment.

LD is used for information that has been published in the scientific literature and, supposedly, has already gone trough a peer-review process. Conversely, OD is used for scientific data collected by compilers or contributors that was not, or has not yet, been published in a scientific journal. This may occur in many instances, because a single fault parameter, e.g. the fault lenght, cannot become a subject worth of publication by itself. Still such information may be crucial to be added in the identificaiton of a seismogenic source. ER applies in all those cases in which the information cannot be directly measured but can be inferred from an existing empirical relationships. This is most often the case for earthquake magnitude. AR applies to simple cases, such as for example, the width of a fault derived from its depths and dip angle. EJ applies in all other cases and often referes to estimates given by compilers and contributors to a parameters based on general considerations from regional data. 


The histograms above illustrate the distribution of qualifiers for the various parameters in a recent database version.   

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