Fig. 2: The 6-year and 8.6-year signals in time domain recovered by this work.
From: Intradecadal variations in length of day and their correspondence with geomagnetic jerks
a Confirms that the 6-year oscillation is a decaying oscillation13 with an observed quality factor ~51 (i.e., the currently observed decaying rate is about 8.4 × 10−4/month); b shows that the 8.6-year signal presents an increasing phenomenon. Here, the phase information of these two signals is recovered accurately from the simulation analysis (Supplementary Figs. 2, 3, 9, 14 and 15). In this work, according to requirement of the BEPME strategy (see “Methods” section), the 6-year oscillation recovered is ended at 2016.4, while the 8.6-year signal is ended at 2016.0.
