# Integrated Earthquake Catalog III: Gakkel Ridge, Knipovich Ridge, and Svalbard Archipelago
## 3 Results
### Magnitude Unification in the Integrated Earthquake Catalog
#### 3.2.2 Knipovich and Gakkel Ridges
\begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline \multirow{2}{*}{**Agency**} & \multirow{2}{*}{\begin{tabular}{c} **Type of** \\ **Magnitude** \\ \end{tabular} } & \multirow{2}{*}{**Priority**} & \multirow{2}{*}{\begin{tabular}{c} **Number** \\ **of Events** \\ \end{tabular} } & \multirow{2}{*}{\
\begin{tabular}{c} **Magnitude** \\ **in the Integrated Catalog** \\ \end{tabular} } & \multirow{2}{*}{**Correlation**} & \multirow{2}{*}{**Figure**} & \multicolumn{2}{c}{
\begin{tabular}{c} **Mmin—** \\ **Mmax. Initial** \\ **Magnitude Scale** \\ \end{tabular} } & \multirow{2}{*}{**Note**} \\ \hline GCMT & \(MW\) & 1 & 112 & \(M=MW^{\text{CCMT}}\) & & – & 4.6-6.7 & \\ \hline ISC & \(mb\) & 2 & 805 & \(M=mb^{\text{BC}}+0.2\) & 0.67 & 15a & 2.9-6.3 & [PERSON] and \\  & & & & & & & [PERSON] \\ \hline NEEC, & \(mb\) & 2 & 80 & \(M=mb^{\text{NEC}}+0.1\) & 0.66 & 15b & 3.3-4.9 & [PERSON] and \\  & & & & & & [PERSON] \\ \hline BER & ML & 3 & 2974 & \(M=ML^{\text{BER}}+1.2\) & 0.54 & 15c & 0.3-3.7 & [PERSON] \\ \hline BER & \(Mw\) & 4 & 1892 & \(M=Mw^{\text{BER}}-0.1\) & 0.72 & 16a & 1.3-5.0 & [PERSON] and \\  & & & & & & [PERSON] \\ \hline BER & \(mb(Pu)\) & 4 & 1521 & \(M=mb(Pu)^{\text{BER}}-0.1\) & 0.82 & 16b & 1.7-4.6 & [PERSON] and \\  & & & & & & [PERSON] \\ \hline DNK & ML & 4 & 83 & \(M=ML^{\text{DNK}}+0.6\) & 0.79 & 16c & 0.9-3.1 & 2008-2015.2 \\  & & & & & [PERSON] \\ \hline DNK & ML & 4 & 753 & \(M=ML^{\text{DNK}}+1.3\) & 0.57 & 16d & 0.1-3.1 & Knipovich \\ \hline KOLA & ML & 4 & 82 & \(M=ML^{\text{KOLA}}+0.5\) & 0.65 & 16e & 1.3-3.4 & Knipovich \\ \hline NAO & ML & 4 & 265 & \(M=ML^{\text{NAO}}+1.1\) & 0.53 & 16f & 0.2-3.4 & 1990-2008 Gakkel and Knipovich \\ \hline NAO & ML & 4 & 32 & \(M=ML^{\text{NAO}}+0.4\) & 0.69 & 16g & 1.7-4.2 & 2009-202 Gakkel and Knipovich \\ \hline FCIAR & ML & 4 & 102 & \(M=ML^{\text{FCIAR}}\) & 0.42 & 16h & 2.3-4.1 & Knipovich \\ \hline BER & MD & 5 & 96 & \(M=MD^{\text{BER}}+1.1\) & 0.62 & 17a & 1.5-4.4 & 1990-2009 \\  & & & & & [PERSON] \\ \hline BER & MD & 5 & 20 & \(M=MD^{\text{BER}}+0.81 MD<2.7\) & 0.23 & 17b & 1.5-2.5 & 2010-2011 [PERSON], \\  & & & & & & & unreliable \\ \hline IDC & \(mb\) & 4 & 21 & \(M=ml^{\text{IDC}}+0.2\) & 0.85 & 17c & 3.0-3.6 & [PERSON] and \\  & & & & & & [PERSON] \\ \hline EIDC & \(mb\) & 4 & 11 & \(M=mb^{\text{BLOCK}}+0.3\) & 0.76 & 17d & 2.9-3.7 & [PERSON] and \\  & & & & & & [PERSON] \\ \hline USCGS & \(mb\) & 4 & 4 & \(M=mb^{\text{USCS}}+0.2\) & 0.83 & 18a & 4.2-4.6 & [PERSON] and \\  & & & & & & [PERSON] \\ \hline MOS & MS & 4 & 1 & \(M=0.515\text{MS}^{\text{SC}}+2.88\) & 0.71 & 18d & 4.7 & [PERSON] and \\  & & & & & & [PERSON] \\ \hline NAO & \(mb\) & 4 & 3 & \(M=mb^{\text{NAO}}+0.5\) & 0.62 & 18b & 3.6-4.1 & [PERSON] \\ \hline HFS & \(mb\) & 4 & 1 & \(M=mb^{\text{NAO}}+0.5\) & 0.50 & 18c & 3.9 & [PERSON] \\ \hline OTT & ML & 4 & 27 & \(M=ML^{\text{OTT}}+0.1\) & 0.23 & 18e & 3.2-5.0 & [PERSON] and \\  & & & & & & [PERSON] \\ \hline EIDC & ML & 5 & 7 & \(M=ML^{\text{EDC}}+0.2\) & 0.05 & 18h & 3.4-4.2 & Poorly \\  & & & & & & determined \\ \hline BER & Mc & 5 & 3 & \(M=Mc^{\text{BER}}+0.4\) & 0.03 & 18f & 1.7-3.2 & Poorly \\  & & & & & & determined \\ \hline DNK & Mc & 5 & 6 & \(M=Mc^{\text{BER}}-0.5\) & 0 & 18g & 2.1-3.7 & Poorly \\  & & & & & & & determined \\ \hline CCS & \(M\) & 5 & 5 & \(M=Mc^{\text{CGS}}\) & & 4.2-4.7 & Not Determined \\ \hline DNK & MD & 5 & 1 & \(M=MD^{\text{BER}}\) & & 2.4 & Not Determined \\ \hline PAL & \(M\) & 5 & 2 & \(M=M^{\text{PAAL}}\) & & 4.3 & Not Determined \\ \hline STU & \(M\) & 5 & 1 & \(M=M^{\text{ETU}}\) & & 5.2 & Not Determined \\ \hline OTT & \(Mn\) & 5 & 1 & \(M=Mn^{\text{OTT}}\) & & 3.1 & Not Determined \\ \hline WAR & \(M\) & 5 & 1 & \(M=M^{\text{WAR}}\) & 2.6 & Not Determined \\ \hline Total & & & & & & & & \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Magnitude in the integrated catalog: Knipovich Ridge. Figure 16: _Cont._  
Figure 15: Basic shift-type correlation ratios for magnitudes \(MW^{\rm GCMT}\), \(mb^{\rm ISC}\), \(\rm NEIC\), and \(ML^{\rm BER}\) in the sub-region of Knipovich Ridge.