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Author Thread

Pia Wellgren
Posts: 1

Infrasound/solar activity

Are there any connections between solar activity and infrasound?

12-11-2003 4:27 AM

Charles Wilson
Posts: 1

Auroral substorms, that are a result of solar activity, have been known for 30 years to produce auroral infrasonic waves in both the Arctic and Antarctic auroral zones. The results of our research on auroral infrasound are given in the bibliography that I have listed below. Within the past year at the I53US CTBT/IMS infrasonic station in Alaska as well as at I55US in Antarctica at Windless Bight on the Ross Ice Shelf, we have observed a newly identified auroral infrasonic wave type that is related to pulsating auroras that occur in the morning hours of a typical auroral substorm. Solar activity causes the particle precipitation into the earth's upper atmosphere that in turn produces the pulsating aurora the resulting infrasound.

Sincerely yours,
Professor Charles R. Wilson
Geophysical Institute,
University of Alaska, Fairbanks, Alaska


Wilson, C. R. , Auroral infrasonic and ionospheric absorption substorms, J. Atinos.and Terr. Phys., vol. 74, 4511-4522, 1970

Wilson, C. R. , Auroral infrasonic substorms, The Radiating Atmosphere, McCorrnac (ed.), Reidel Publishing Co., Dordrecht-Holland, 1971

Wilson, C. R., Auroral infrasonic wave generation mechanism, J. Geophys. Res., vol. 77, 1820- 1843,1972

Wilson, C. R. , Auroral infrasonic waves and poleward expansions of auroral substorrns at Inuvik, N.W.T., Canada, Geophysical Journal of R.A.S., vol. 26, 179-181, 1971

Wilson, C. R., Auroral infrasonic waves, J. Geophys. Res., vol. 74, 1812-1836, 1969a

Wilson, C. R. , infrasonic pressure waves from the aurora, a shock wave model, Nature, vol. 214, No. 511, 131-13 3, 1967

Wilson, C. R., Infrasonic wave generation by aurora, J. Atmos. Terr Physics, vol. 3 7, 973 - 988,1975

Wilson, C. R. , Infrasonic waves from moving auroral electrojets, J. of Planet. and Space Physics , vol. 17, 1107, 1969b

Wilson, C. R. , R. D. Hmsucker and J. G. Romick, An auroral infrasonic substorm investigation using Chatanika radar and other geophysical sensors, Planet. Space Sci., vol. 24, 1155- 1175,1976

Wilson, C. R. , Seasonal variations in auroral infrasonic wave activity, J. Geophys. Res., vol. 78, 4801,1973

Wilson, C. R. , Trans-auroral zone aurorae infrasonic wave observations, Planet. Space Sci., vol. 22,151-173,1974

Wilson, C.R. , Two-station auroral infrasonic wave observations, Planet. and Space Sci., vol. 17, 1817, 1969c

Wilson, C. R. and J. D. Hargreaves, The motion of peaks in ionospheric auroral absorption and auroral infrasonic waves, J. of Atmos. Terr. Physics, vol 36, 1555-1560, 1974

12-22-2003 9:42 AM

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