Ionospheric Anomalies Related to the (M = 7.3), August 27, 2012, Puerto Earthquake, (M = 6.8), August 30, 2012 Jan Mayen Island Earthquake, and (M = 7.6), August 31, 2012, Philippines Earthquake: Two-Dimensional Principal Component Analysis
Figure 1
(a) The figures show the GIMs during the time period from 04:20 to 04:45 on 28 August 2012 (UT). (b) The figures give a color-coded scale of the magnitudes of principal eigenvalues of 2DPCA corresponding to Figure 1(a). The color within a grid denotes the magnitude of a principal eigenvalue corresponding to Figure 1(a), so that there are 600 principal eigenvalues assigned for 600 grids in each small map, respectively. (c) The figures give a color-coded scale of the magnitudes of principal eigenvalues of PCA corresponding to Figure 1(a).
