Table 1
Comparison between observed and model oscillation periods for the four detected locations in SG13.
| Location of observation | Observed periods [min] | MHD period [min] | BMHD (G) | BCS (G) |
|
|
||||
| Flare Blast (L1) | 8.9 | 9.2 | 2.2 | 8.4 |
| Apex Inside (L2) | 13.3 | 13.5* | 3.1 | 4.3 |
| Apex Surface (L3) | 14.9 | 14.8 | 2.9 | 4.3 |
| Southward Surface (L4) | 12.7 | 11.7 | 3.4 | 4.9 |
Notes. The values of the MHD periods were obtained using periodogram analysis (Scargle 1982) and the period with the highest intensity was chosen as the proxy for the normal mode. The penultimate column shows the magnetic field strength obtained from the 3D MHD model, and the last column is from simplified coronal seismology (CS).
At point L2 the average of two periods near the peak are given since they have close high confidence level (see Fig. 6).
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