Fig. 1
From: Can we explain the post-2015 absence of the Chandler wobble?
The polar motion time-series. (a) The X-component of the polar motion data, EOP 14 C04, since 1976 (red) and the polar motion model (blue) by fitting the data from 2015 to 2021 with only the AW and long-term polar drift period and extending back to 1971. (b) Estimated CW since 1971 by taking a difference between the two time-series in (a). Note that we do not assume any Chandler period (P) and Q of the CW. c Similar to b but extended time-series back to 1890, using the polar motion data, EOP C01 IAU1980. The Y-components are shown in Additional file 1: Figure S1.