Table 6 Correlations among the first three PCs and the variables shown in Biplot of Fig. 9.
PC | z-trend | z- oscillation | Shallow earthquakes | Deep earthquakes | Est. Temp. CO | Est. Press CO2 | Est. Press H2O | GF1 | GF2 | GF3 |
|---|---|---|---|---|---|---|---|---|---|---|
PC1 | 0.96 | 0.01 | 0.84 | 0.36 | 0.99 | 0.88 | 0.98 | 0.94 | − 0.21 | − 0.19 |
PC2 | − 0.03 | − 0.40 | − 0.38 | 0.37 | 0.00 | 0.36 | − 0.08 | 0.24 | 0.47 | 0.75 |
PC3 | 0.04 | − 0.55 | 0.17 | 0.16 | − 0.05 | − 0.09 | − 0.00 | − 0.14 | − 0.79 | 0.33 |
