TY - JOUR
T1 - Reply to Yao et al.'s comment on “Origin of temporal changes of inner-core seismic waves”
AU - Yang, Yi
AU - Song, Xiaodong
N1 - Funding Information:
We thank YAO20 for correctly pointing out the issue of the source depth, which helped us strengthen our original arguments. Discussions with John Vidale over the course of this work and reviews from two anonymous referees helped improve the paper. We also benefited from information from GSN and other network operators (esp. Pete Davies and Dave Wilson) and Sidao Ni and Jun Xie on station timing issues. This research was supported by the National Natural Science Foundation of China ( U1939204 ) and The National Science Foundation of the United States ( EAR 1620595 ).
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2021/1/1
Y1 - 2021/1/1
N2 - In this reply, we address the main issues raised by Yao et al. (2020) and conduct additional analyses, particularly on the seismic station clock problems and the influence of earthquake depth. We show that although the depth is an important issue to consider, the depth difference of our doublets is too small to be significant. Extensive analyses reaffirm our previous conclusions that (1) the inner core (IC) temporal changes come mostly from the interior (rather than its surface) and the proposal that the IC surface as the sole source of the temporal changes can be ruled out; (2) the most reasonable and simplest explanation so far for the temporal changes is an IC differential rotation; and (3) absolute-time based method in previous studies should be avoided for studies of temporal changes of less than 0.15 s unless the clock issue is resolved.
AB - In this reply, we address the main issues raised by Yao et al. (2020) and conduct additional analyses, particularly on the seismic station clock problems and the influence of earthquake depth. We show that although the depth is an important issue to consider, the depth difference of our doublets is too small to be significant. Extensive analyses reaffirm our previous conclusions that (1) the inner core (IC) temporal changes come mostly from the interior (rather than its surface) and the proposal that the IC surface as the sole source of the temporal changes can be ruled out; (2) the most reasonable and simplest explanation so far for the temporal changes is an IC differential rotation; and (3) absolute-time based method in previous studies should be avoided for studies of temporal changes of less than 0.15 s unless the clock issue is resolved.
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U2 - 10.1016/j.epsl.2020.116639
DO - 10.1016/j.epsl.2020.116639
M3 - Letter
AN - SCOPUS:85096174232
SN - 0012-821X
VL - 553
JO - Earth and Planetary Sciences Letters
JF - Earth and Planetary Sciences Letters
M1 - 116639
ER -