A Least Square Fit Analysis on the Earth’s Polar Motion Time Series: Implication against Smylie’s Conjec
A Least Square Fit Analysis on the Earth’s Polar Motion Time Series: Implication against Smylie’s Conjec
정태웅(세종대학교); 나성호(우주측지관측센터)
19권 2호, 91~96쪽
초록
From the Earth’s polar motion time series (IERS 08 C04, since 1981), after removal of seasonal variation by band-pass filtering, we acquired Earth’s free Eulerian motion (Chandler wobble) time series. By successive least square error fittings on it, we analyzed amplitude and phase variation of Chandler wobble. We attempted to identify any precursory behavior of the pole before large earthquakes but only to fail. Unlike Smylie’s conjecture there was no appreciable motion of the Earth’s pole detected at around the each times of recent six largest earthquakes of magnitude over 8.5.
Abstract
From the Earth’s polar motion time series (IERS 08 C04, since 1981), after removal of seasonal variation by band-pass filtering, we acquired Earth’s free Eulerian motion (Chandler wobble) time series. By successive least square error fittings on it, we analyzed amplitude and phase variation of Chandler wobble. We attempted to identify any precursory behavior of the pole before large earthquakes but only to fail. Unlike Smylie’s conjecture there was no appreciable motion of the Earth’s pole detected at around the each times of recent six largest earthquakes of magnitude over 8.5.
- 발행기관:
- 한국지구물리.물리탐사학회
- 분류:
- 물리탐사