n t l maximum frequency (uHz) difference Q difference degree from PREM from PREM estimated 1 S 2 2 680.23 +/- 0.11 0.38 368 +/- 20 57 1 S 3 2 940.14 +/- 0.02 0.31 329 +/- 13 46 1 S 4 4 1172.99 +/- 0.03 0.14 309 +/- 11 38 1 S 5 6 1370.16 +/- 0.05 -0.12 341 +/- 9 49 1 S 6 6 1521.47 +/- 0.03 -0.57 411 +/- 11 66 1 S 7 8 1654.57 +/- 0.04 -0.94 438 +/- 12 66 1 S 8 10 1797.93 +/- 0.03 -1.38 432 +/- 14 53 1 S 9 8 1961.78 +/- 0.06 -1.96 436 +/- 12 56 1 S 10 4 2145.98 +/- 0.16 -2.44 431 +/- 11 53 1 S 14 2 2973.97 +/- 0.92 -1.82 306 +/- 13 13