Skip to main content

GSM Lecture: Monday, January 24, 2011, 7:30 PM

GSM LectureMonday, January 24, 2011, 7:30 PM

Note minor room change:

Room 3-230: This is the room right next to the room we have had for years at the University of Minnesota, East bank campus, Electrical Engineering/Computer Science Bldg, now called Keller Hall, 200 Union St SE, Mpls, 55455


Probing the Interior of the Earth:

A Geophysical Journey


Dr Ian Williams

University of Wisconsin, River Falls


Probing the Interior of the Earth: A Geophysical Journey

The investigation of the Earth’s interior is a classic example of the scientific method.  Since this region is so remote – more remote than the surfaces of the other planets – we have been forced to use geophysical techniques, primarily those based on the interpretation of earthquake records. These seismic records have enabled us to construct a model of the interior that has lead us to an understanding of the structure and composition of the interior.  The records have  become the basis for seismic tomography: which allows us to see the convection taking place in the mantle.  Although relatively crude, tomography has revealed aspects of the core that have helped us understand the origin of the earth’s magnetic field.


Professional Bio -Dr. Ian Williams, University of Wisconsin River Falls.

Ian Williams has been on the faculty of the University of Wisconsin River Falls since 1982.  He holds a PhD, with research on geomagnetic reversals, from the University of California, Santa Barbara. He also has a Masters in geophysics from the University of Newcastle upon Tyne (UK) and a B.Sc. in geology from Durham University (UK).  He teaches classes in geophysics, structural geology and planetary geology and is currently involved in an on-line class in sustainable energy. Working with undergraduates has given him the opportunity to indulge in numerous research projects ranging from the gravity studies of the St. Croix Valley to impact cratering, fold and fault simulation and weathering of the St. Peter Sandstone.  In addition he has traveled widely with UWRF’s international programs in Europe and developed an interest in the structure of the Pyrenees.