RELATING DEEP AND SHALLOW EARTH THROUGH REFLECTION SEISMOLOGY: AN EDUCATIONAL OUTREACH PROJECT

As part of a National Science Foundation-funded project on deep seismic reflection profiling, we have created a media presentation that relates seismological results from the deep and “remote” (e.g., 60 km depth) upper mantle with more “familiar” (e.g., 60 m depth) near-surface geology by using high-resolution shallow seismic reflection profiles. The “familiar” targets include structure and stratigraphic detail that is correlated directly to outcrop, a hydrological problem within a subsiding basin, and a landslide in an area of new housing development. Using results from seismic profiles thus acquired at vastly different scales, we organized a DVD/video presentation for K-12 school application. This project communicates the excitement of “seeing” into the earth's lower crust and upper mantle using sound waves, as one might use ultra-sound to image an unborn child. The DVD/video will be publicly available for incorporation into general science programs. Using a light and captivating approach, the DVD/video gives an introduction to the field of geophysics and emphasizes career possibilities and applications in geophysics. The DVD/video includes shots filmed on location from seismic reflection surveys in different environments and from geology labs and field trips organized by Brigham Young University. We take good advantage of Utah's spectacular geology by including scenic clips and panoramic pictures from areas such as the Wasatch Front and Southern Utah's canyon lands to help portray the “layers” of rocks we can see around us, and how this relates to the deep geology beneath us. Following a preface using digital graphics and animations that describe the earth's structure, tectonic movement, earthquakes, followed by the use of sound waves in imaging, we narrate critical data acquisition and processing steps involved in seismic interpretation. Critical data steps addressed are: how scientists create energy waves, seismograph and geophone data recording, frequency filtering, migration, and deep seismic interpretation. All are presented visually using 3D and digital graphics and are described for the layperson. This project is unique in that is was made by students for students and also includes an outline of how it was completed, so as to encourage more students to participate in educational outreach projects.