Publication Date:
2020-02-12
Description:
Monthly variations in the ratio of Rayleigh‐to‐Love waves in the secondary microseism are obtained from a colocated ring laser and an STS‐2 seismograph at Wettzell, Germany. Two main conclusions are derived for the Rayleigh‐to‐Love wave kinetic energy ratios in the secondary microseism; first, the energy ratio is in the range 0.8–0.9 (〈1.0) throughout a year except for June and July. It means that Love wave energy is larger than Rayleigh wave energy most of the year by about 10–20%. Second, this ratio suddenly increases to 1.0–1.2 in June and July, indicating a larger fraction of Rayleigh wave energy. This change suggests that the locations and behaviors of excitation sources are different in these months.
Language:
English
Type:
info:eu-repo/semantics/article
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