ISSN:
1420-9136
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
,
Physics
Notes:
Summary Experiments have been made to determine whether a significant amount of microseism energy in the open ocean can be carried in organ-pipe π waveguide modes. A three-component seismometer in a spherical aluminum container was balanced to float freely at midwater depth; a similar instrument was dropped on the ocean bottom. Simultaneous records from the two instruments were analyzed for peaks in coherence of their power spectra. Results indicate a substantial energy in π modes in the ocean area of the observation, though the peak power appears in an unidentified mode with large horizontal motion of the water. Measurements at the same area, but widely separated in time, indicate that the frequencies of microseism peaks and the general shape of the microseism spectrum are characteristic of the geographicallocation, in agreement with the conclusion of Monakhov. The microseisms are characterized as motion in a wave guide that is excited by a non-white forcing function.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00876402
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