Mutual Coupling Between Meteorological Parameters and Secondary Microseisms

• Main Authors: Holub, K. (Karel), Kalenda, P. (Pavel), Rušajová, J. (Jana)
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2013
• Subjects: secondary microseisms; meteorological elements; statistics; North Atlantic
• Online Access: https://doi.org/10.3319/TAO.2013.07.04.01(T; http://hdl.handle.net/11104/0227386

The basic scientific question of this study was: do other mechanisms exist for excitation of secondary microseisms aside from the widely accepted mechanism by non-linear interactions of respective ocean waves. Here we use continuous broad- band data from secondary microseisms recorded at the Ostrava-Krásné Pole, Czech Republic (OKC) seismic station to create a massive seismological database. Except for seismological data, various meteorological features and their mutual relations were analysed: temperature, the so called “shifted” temperature, air density, changes of atmospheric pressure, and synoptic situations. These analyses prove that maximum amplitudes of microseisms were observed during winter, while minimum amplitudes occured in summer months. The annual variations of microseisms amplitudes could not be explained by annual variations of storm activity above the North Atlantic. In addition, current analyses also aim at quantitative and quantitative evaluation of synoptic situations for triggering individual microseismic anomalies.