An Analogue Model Study of Electromagnetic Induction in the Vancouver Island Region

The behaviour of the time-varying electromagnetic fields over the Vancouver Island region is investigated using a scaled analogue model. The results show that conductive channelling in the shallow seawater channel around the island is important for both E and H polarization of the inducing field and for all frequencies studied. It appears that channelled telluric currents flow along either side of Vancouver Island with some diffusion of current into the continent to the southeast of the island. For the H polarization case there is some evidence of current flow around the SE tip of Vancouver Island as well. The results also show the effects of local confinement of current whereby the direction of telluric flow is modified by the geometry of the seawater channel.

[1]  F. W. Jones,et al.  An analogue model study of electromagnetic induction for island-continent ocean channels for the H polarization , 1977 .

[2]  F. W. Jones,et al.  Comments on the “numerical and analogue model results for electromagnetic induction for an island situated near a coastline” , 1977 .

[3]  R. N. Edwards,et al.  The Effect of Source Field Polarization on Geomagnetic Variation Anomalies in the British Isles , 1976 .

[4]  F. W. Jones,et al.  An analogue model study of electromagnetic induction for island-continent ocean channels , 1976 .

[5]  F. W. Jones,et al.  Numerical and analogue model results for electromagnetic induction for an island situated near a coastline , 1975 .

[6]  J. E. Lokken,et al.  Irregular coastline and channeling effects in three-dimensional geomagnetic perturbation models , 1975 .

[7]  C. Brewitt-Taylor.  A model for the coast-effect , 1975 .

[8]  N. Cochrane,et al.  Magnetotelluric and Magnetovariational Studies in Atlantic Canada , 1974 .

[9]  F. W. Jones.  The Effect of an Island and Bay Structure on Alternating Geomagnetic Fields at Three Periods , 1974 .

[10]  R. N. Edwards,et al.  Electrical Conductivity Studies over a Tectonically Active Area in Eastern Canada , 1974 .

[11]  D. Gough.  The geophysical significance of geomagnetic variation anomalies , 1973 .

[12]  H. W. Dosso.  A review of analogue model studies of the coast effect , 1973 .

[13]  H. Dragert.  A Transfer Function Analysis of a Geomagnetic Depth Sounding-Profile across Central British Columbia , 1973 .

[14]  F. W. Jones,et al.  The Perturbation of Alternating Geomagnetic Fields by an Island Near a Coastline , 1973 .

[15]  W. Nienaber,et al.  Analysis of Anisotropic Magnetotelluric Measurements at Victoria, B.C. , 1973 .

[16]  H. Miller.  Analysis of geomagnetic variations in western British Columbia , 1973 .

[17]  N. Cochrane,et al.  Electrical Conductivity Structure by Geomagnetic Induction at the Continental Margin of Atlantic Canada , 1971 .

[18]  H. Dragert,et al.  Geomagnetic depth‐sounding and crustal structure in western Canada , 1971 .

[19]  R. N. Edwards,et al.  Geomagnetic variations in the British Isles and their relation to electrical currents in the ocean and shallow seas , 1971, Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences.

[20]  Y. Honkura.  Geomagnetic Variation Anomaly on Miyake-jima Island , 1971 .

[21]  N. Cochrane,et al.  A new analysis of geomagnetic depth-sounding data from western Canada , 1970 .

[22]  E. R. Niblett,et al.  A large-scale magnetotelluric survey in Western Canada , 1969 .

[23]  G. Garland,et al.  A conductivity model for certain features of the Alert anomaly in geomagnetic variations , 1969 .

[24]  D. Auld,et al.  Magneto-telluric determination of upper mantle conductivity structure at Victoria, British Columbia , 1968 .

[25]  H. W. Dosso.  ANALOGUE MODEL MEASUREMENTS FOR ELECTROMAGNETIC VARIATIONS NEAR A COASTLINE , 1966 .

[26]  H. W. Dosso.  ANALOGUE MODEL MEASUREMENTS FOR ELECTROMAGNETIC VARIATIONS NEAR VERTICAL FAULTS AND DYKES , 1966 .

[27]  T. Rikitake.  Electromagnetism and the earth's interior , 1966 .

[28]  H. W. Dosso.  A PLANE-WAVE ANALOGUE MODEL FOR STUDYING ELECTROMAGNETIC VARIATIONS , 1966 .

[29]  力武 常次.  Electromagnetism and the earth's interior , 1966 .

[30]  K. Whitham,et al.  Magneto-Telluric Experiments in Northern Ellesmere Island , 1965 .

[31]  A. Lambert,et al.  GEOMAGNETIC "DEPTH-SOUNDING" AND THE COAST EFFECT IN WESTERN CANADA , 1965 .

[32]  B. Caner,et al.  Geomagnetic Depth-Sounding and Correlation with other Geophysical Data in Western North America , 1965, Nature.