Electromagnetic Induction in the Earth
Marine Geophysics and Oceanography
Ted Lilley grew up in Hobart, and was educated at Hutchins School. Upon completing secondary studies he was awarded a cadetship in geophysics by the Australian Atomic Energy Commission. He studied science at the University of Sydney (1957-1960) graduating BSc(hons). He was a resident of St Paul's College.
After experience in aeromagnetic surveying with the Bureau of Mineral Resources (now Geoscience Australia), he undertook graduate study in geophysics at the University of Western Ontario, Canada, where he graduated MSc and PhD.
Postdoctoral work on the dynamo theory for the cause of Earth's magnetic field followed at the University of Cambridge in England, before he returned to Australia in 1968, to the Australian National University in Canberra. Successively a Research Fellow, Fellow and Senior Fellow, he carried out research in geophysics, and retired at the end of 2003. He is now an Honorary Associate Professor in the Research School of Earth Sciences.
He has worked particularly in geomagnetism, and on measurements of natural electromagnetic induction in the Earth. These research projects have led to participation and leadership in the first magnetometer array studies in Australia and India, early magnetotelluric measurements on land and seafloor, and a variety of other measurements of natural electromagnetic induction, both terrestrial and marine. Observing new phenomena has often called for new theoretical understanding, which has been a stimulating part of the work. His publication list demonstrates the extent to which he has benefitted from interaction with colleagues, especially research students.
Regional studies of Australian electrical conductivity are on a larger scale than individual exploration projects. However, the methods employed may be adapted (using a higher frequency of signal) to the search for commercial bodies.
Magnetic mapping for geological and other purposes takes place while, in the background, part of Earth's magnetic field varies with time. Regional electromagnetic induction studies provide information which helps to understand and mitigate this limitation to the accuracy of magnetic mapping. For example the concept of a magnetic amphidrome, a region where natural magnetic fluctuations are subdued, and the existence of such a region across much of southern Australia is a matter of practical value.
Motional electromagnetic induction, a fundamental geophysical process, can be observed
in the oceans surrounding Australia. Ocean swells generate a magnetic signal, which
may contaminate aeromagnetic surveys over continental shelves. Marine electromagnetic
studies also have application to the measurement
of flow in ocean currents.
American Geophysical Union
Australian Society of Exploration Geophysicists
(awarded Honorary Membership 2004)
Geological Society of Australia
Australian Marine Sciences Association (past member)
Canadian Geophysical Union (past member)
Society of Exploration Geophysicists (past member)
Lilley, Ted, 2021. Geophysics student practicals around Canberra, half a century ago. Preview (Newsletter of the Australian Society of Exploration Geophysicists), 212, 15-16. https://doi.org/10.1080/14432471.2021.1935755. P132
Lilley, F.E.M., and Phillips, C.J.E., 2018. A property of the determinant of a 2x2 tensor relevant to magnetotellurics. Geophysics, 83(4), A59-A64. https://library.seg.org/doi/10.1190/GEO2017-0315.1. P130
Lilley, F.E.M., 2012. Magnetotelluric tensor decomposition: Insights from linear algebra and Mohr diagrams. Chapter 4 in: Lim, Hwee-San (Ed.) "New Achievements in Geoscience", ISBN 978-953-51-0263-2, InTech Open Science, 81-106. P125
Lilley, F.E.M., 2003. Summary and Reflections: Closing Review of 3DEMIII Workshop. In: Macnae, J. and Liu, G. (Eds) "Three-Dimensional Electromagnetics III", Australian Society of Exploration Geophysicists, Invited Paper, 1-5. P109
Weaver, J.T., Agarwal, A.K. and Lilley, F.E.M., 2003. The relationship between the magnetotelluric tensor invariants and the phase tensor of Caldwell, Bibby and Brown. In: Macnae, J. and Liu, G. (Eds) "Three-Dimensional Electromagnetics III", Australian Society of Exploration Geophysicists, Paper 43, 1-8. P108
Broxholme, K., Heinson, G., Busuttil, S. and Lilley, T., 2003. Two-dimensional magnetotelluric analysis of three-dimensional bodies: a case study from South Australia. In: Macnae, J. and Liu, G. (Eds) "Three-Dimensional Electromagnetics III", Australian Society of Exploration Geophysicists, Paper 15, 1-10. P107
Popkov, I., White, A., Heinson, G., Constable, S., Milligan, P. and Lilley, F.E.M., 2000. Electromagnetic investigation of the Eyre Peninsula conductivity anomaly. Exploration Geophysics, 31, 187-191. P102
Hitchman, A.P., Milligan, P.R., Lilley, F.E.M., White, A. and Heinson, G.S., 2000. The total-field geomagnetic coast effect: the CICADA97 line from deep Tasman Sea to inland New South Wales. Exploration Geophysics, 31, 52-57. P101
Hitchman, A., Lilley, F.E.M., Campbell, W., Chamalaun, F. and Barton, C., 1998. The magnetic daily variation in Australia: dependence of the total-field signal on latitude. Exploration Geophysics, 29, 428-432. P95
Lilley, F.E.M.(Ted), 1995. Strike direction: obtained from basic models for 3D magnetotelluric data. In: Three-Dimensional Electromagnetics (M. Oristaglio and B. Spies, Eds), Schlumberger-Doll Research, Ridgefield, Conn. USA, 358-369. P91
Lilley, F.E.M., McQueen, H.W.S., Collins, C.D.N., Denham, D., Barton, C.E., Finlayson, D.M., Dooley, J.C. and Drummond, B.J., 1994. Solid-Earth Geophysics Specialist Group. In Rock Me Hard, Rock Me Soft; a History of the Geological Society of Australia Incorporated (B.J. Cooper and D.F. Branagan, Eds), Geol. Soc. Aust., 139-141. P90Corkery, R.W. and Lilley, F.E.M., 1994. Towards an electrical conductivity model for Australia. Australian Journal of Earth Sciences, 41, 475-482. P89
Lilley F.E.M.(Ted), 1993. The Global Geomagnetic Field. Exploration Geophysics, 24, 127-128. P88
Lilley, F.E.M.(Ted), and Corkery, Robert W., 1993. The Australian Continent: a numerical model of its electrical conductivity structure, and electromagnetic response. Exploration Geophysics, 24, 637-644. P87
Lilley, F.E.M. and Heinson, G.S., 1992. Examples in the inversion of seafloor magnetotelluric data. Proc. Centre Mathematical Analysis (Australian National University) 31, 121-142. P79
Lilley, F.E.M.(Ted), 1992.. The D'Entrecasteaux Bicentenary Meeting, Tasmania, 9-11 May 1992. Geophysics Down Under (Newsletter of the Specialist Group on Solid-Earth Geophysics, Geological Society of Australia), No 15/16 of June/December 1992, 21-24. P78a
Lilley, F.E.M., 1991. D'Entrecasteaux in Van Diemen's Land, 1792: a bicentenary in Geomagnetism. Geophysics Down Under (Newsletter of the Specialist Group on Solid-Earth Geophysics, Geological Society of Australia), No 14 of December 1991, 5-6. P78
Lilley, F.E.M., 1991. The state of knowledge of the asthenosphere from electromagnetic soundings: Australia and surrounding oceans. In The Australian Lithosphere (B.J. Drummond, Ed.), Geol. Soc. Aust. Spec. Publ. 17, 141-146. P77
Kellett, R.L., Lilley, F.E.M. and White, A., 1991. A two-dimensional interpretation of the geomagnetic coast effect of southeast Australia, observed on land and seafloor. Tectonophysics, 192, 367-382. P75
Ferguson, I.J., Lilley, F.E.M. and Filloux, J.H., 1990. Geomagnetic induction in the Tasman Sea and electrical conductivity structure beneath the Tasman Seafloor. Geophysical Journal International, 102, 299-312. P73
Lilley, F.E.M., Filloux, J.H., Ferguson, I.J., Bindoff, N.L. and Mulhearn, P.J., 1989. The Tasman Project of Seafloor Magnetotelluric Exploration: experiment and observations. Physics Earth Planetary Interiors, 53, 405-421. P70
Mulhearn, P.J., Filloux, J.H., Lilley, F.E.M., Bindoff, N.L. and Ferguson, I.J., 1988. Comparisons between surface, barotropic and abyssal flows during the passage of a warm-core ring. Australian Journal Marine Freshwater Research, 39, 697-707. P68
Lilley, F.E.M., 1987. Contribution on ELAS in Australia and surrounding oceans. In: The Composition, Structure and Dynamics of the Lithosphere-Asthenosphere, pp. 229-231, eds K. Fuchs and C. Froidevaux, American Geophysical Union Geodynamics Series volume 16. P65
Chamalaun, F.H., Prasad, S.N., Lilley, F.E.M., Srivastava, B.J., Singh, B.P. and Arora, B.R., 1987. On the interpretation of the distinctive pattern of geomagnetic induction observed in northwest India. Tectonophysics, 140, 247-255. P64
Lilley, F.E.M., Filloux, J.H., Bindoff, N.L., Ferguson, I.J. and Mulhearn, P.J., 1986. Barotropic flow of a warm-core ring from seafloor electric measurements. Journal Geophysical Research, 91, 12979-12984 and (colour plate) 13109. P62
Mulhearn, P.J., Filloux, J.H., Lilley, F.E.M., Bindoff, N.L. and Ferguson, I.J., 1986. Abyssal currents during the formation and passage of a warm-core ring in the East Australian Current. Deep-Sea Research, 33, 1563-1576. P60
Bindoff, N.L., Filloux, J.H., Mulhearn, P.J., Lilley, F.E.M. and Ferguson, I.J., 1986. Vertical electric field fluctuations at the floor of the Tasman Abyssal Plain. Deep-Sea Research, 33, 587-600. P56
Lilley, F.E.M., Mulhearn, P.J., Filloux, J.H., Bindoff, N.L. and Ferguson, I.J., 1986. Pressure fluctuations on the open-ocean floor: mid-Tasman Sea at (38 30'S, 162 38'E) near Lord Howe Rise. Australian Journal Marine Freshwater Research, 37, 27-37. P55
Arora, B.R., Lilley, F.E.M., Sloane, M.N., Singh, B.P., Srivastava, B.J. and Prasad, S.N., 1982. Geomagnetic induction and conductive structures in north-west India. Geophysical Journal Royal Astronomical Society, 69, 459-475. P47
Lilley, F.E.M. and Sloane, M.N., 1981. Ideal phase in estimating the spatial gradient of magnetic daily variations recorded by magnetometer arrays. Journal Geomagnetism Geoelectricity, 33, 517-525. P46
Lilley, F.E.M., Woods, D.V. and Sloane, M.N., 1981. Electrical conductivity profiles and implications for the absence or presence of partial melting beneath central and south-east Australia. Physics Earth Planetary Interiors, 25, 419-428. P45
Woods, D.V. and Lilley, F.E.M., 1980. Anomalous geomagnetic variations and the concentration of telluric currents in southwest Queensland, Australia. Geophysical Journal Royal Astronomical Society, 62, 675-689. P42
Woods, D.V. and Lilley, F.E.M., 1979. Concentrations of natural telluric currents and their relation to the basement structure of the Eromanga Basin, southwest Queensland. Bulletin Australian Society of Exploration Geophysicists, 10, 212-213. P39
Last modified: 2009