# Integrated Earthquake Catalog II: The Western Sector of the Russian Arctic
## 3 Results
### Integrated Catalog of the Western Sector of the AZRF
#### 3.1.2 Stage 2. Merging the ISC and RUS Catalogs
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \multirow{2}{*}{**Stage**} & \multirow{2}{*}{\begin{tabular}{c} **Main** \\ **Catalog** \\ \end{tabular} } & \multirow{2}{*}{\begin{tabular}{c} **Additional** \\ **Catalog** \\ \end{tabular} } & \multirow{2}{*}{\begin{tabular}{c} **Metric** \\ **Parameters** \\ **Catalog** \\ \end{tabular} } & \multirow{2}{*}{\begin{tabular}{c} **Threshold** \\ **Value** \\ **forn** \(\sigma_{Y}\) **km** \\ \end{tabular} } & \multirow{2}{*}{\begin{tabular}{c} **Estimation of** \\ **Value** \\ **of the Metric** \\ \end{tabular} } & \multirow{2}{*}{\begin{tabular}{c} **Number of** \\ **of Errors** \\ \end{tabular} } & \multirow{2}{*}{\begin{tabular}{c} **Merged** \\ **Catalog** \\ \end{tabular} } \\ \hline \multirow{2}{*}{\(1\)} & ARC & VEP & 0.05; & \multirow{2}{*}{\(10\)*} & \multirow{2}{*}{-} & \multirow{2}{*}{\(3\)*} & \multirow{2}{*}{\
\begin{tabular}{c} **RUS** \\ **920 events** \\ \end{tabular} } \\  & **175 events** & **748 events** & & 15.0 & & & & \\ \hline \multirow{2}{*}{\(2\)} & ISC & RUS & 0.035; & \multirow{2}{*}{\(13\)} & \multirow{2}{*}{\(0.2\%\)} & \multirow{2}{*}{\(282\)} & ISC\_RUS \\  & **4418 events** & **920 events** & & 16.6 & & & & \\ \hline \multirow{2}{*}{\(3\)} & Morozov & ISC\_RUS & 0.05; & \multirow{2}{*}{\(20\)} & \multirow{2}{*}{\(108\)} & \multirow{2}{*}{\(
\begin{tabular}{c} **W\_ARCTIC0** \\ **5066** \\ \end{tabular} } \\  & **118 events** & **5056 events** & & 15.0 & & & \\ \hline \multirow{2}{*}{\(4.1\)} & W\_ARCTIC0 & ER\_EXP & 0.05; & \multirow{2}{*}{\(10\)} & \multirow{2}{*}{-} & \multirow{2}{*}{\(284\)} & W\_ARCTIC1 \\  & **5066** & **14,490 events** & & 15.0 & & & \\ \hline \multirow{2}{*}{\(4.2\)} & W\_ARCTIC1** & VEP\_EXP & 0.05; & \multirow{2}{*}{\(10\)} & \multirow{2}{*}{-} & \multirow{2}{*}{\(4\)} & W\_ARCTIC2 \\  & **4782 events** & **170 events** & & 15.0 & & & \\ \hline \multirow{2}{*}{\(4.3\)} & W\_ARCTIC2 & ISC\_EXP & 0.05; & \multirow{2}{*}{\(10\)} & \multirow{2}{*}{-} & \multirow{2}{*}{\(92\)} & W\_ARCTIC \\  & **4778 events** & **100,112 events** & & & & & \\ \hline \end{tabular}  
* The number of duplicates is not enough to optimize the metric parameters.  
\end{table} 
Table 3: Scheme and compilation parameters of the integrated catalog. Figure 5: Distributions of metric parameters \(DT\), \(DX\), and \(DY\), and the dependence of dispersion and mean values on time and magnitude of events for merging the ISC and RUS catalogs. Figure 6: (a) Comparison of the metric distribution ISC/RUS pairs (transparent blue histogram) and the same metric for RUS/RUS earthquakes (transparent red histogram); the intersection of histograms appears purple; (b) Threshold optimization: the red line shows the probability of missing a duplicate in the model with metric (1), the blue line shows the probability of a false duplicate, and the black line shows the total probability of first and second type errors. The gray band shows the range metric values \(Ro=8\div 35\), which minimize the total number of errors, approximately 0.2%. The threshold value \(Ro=20\) is shown by a dashed line.