Review of Magnetospheric Boundary Layer Pheomena and Relations to Current Theories

Walter J. Heikkila and Lars P. Block

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Study of Latitudinal, Diurnal and Seasonal Variation of Ionospheric Absorption According to Observations of the Riometer Network in Finland

Hilkka Ranta and Aarne Ranta

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DCF 77 Giving Automatic Time Mark

Aarne Ranta

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The Interaction of the Monthly Mean Flow and Large-Scale Transient Eddies in two Different Circulation Types. Part II.

Hannu Savijärvi

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Simultaneous Measurements of Earth Tides in Oslo and Bergen

Reidar Kanestrøm, Kåre Horpestad and Torstein Navrestad

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Magnification of WWSS Long-Period Seismographs

Vladimír Tobyáš, Pekka Teikari and Eijo Vesanen

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