Acoustic, electromagnetic and ionospheric disturbances during the vibroseismic sounding

Details Acoustic, electromagnetic and ionospheric disturbances during the vibroseismic sounding Acoustic, electromagnetic and ionospheric disturbances during the vibroseismic sounding

Jul 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26.2017k&link_type=abstract

Geophysical Research Letters, Volume 26, Issue 13, p. 2017-2020

Computer Science

Sound

1

Seismology, Ionosphere: Ionospheric Disturbances, Meteorology And Atmospheric Dynamics: Atmospheric Electricity, General Or Miscellaneous: Techniques Applicable In Three Or More Fields

Scientific paper

The electromagnetic and acoustic phenomena during the powerful seismovibrator operation in frequency range from 5 to 10 Hz on horizontal distances up to 50 km were studied. The electromagnetic wave radiated on frequency of the seismovibrator and synchronous seismic and acoustic modes were detected. Ionospheric disturbances exhibited as a phase modulation of the sounding radiowave were registered. This effect is observed only in the daily sessions when the stable E-layer exists in ionosphere. The delay between seismic and ionospheric signals is estimated to be about 7 minutes and it agrees with the time of the acoustic wave propagation to ionosphere.

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