Bulletin of the American Physical Society
2008 APS April Meeting and HEDP/HEDLA Meeting
Volume 53, Number 5
Friday–Tuesday, April 11–15, 2008; St. Louis, Missouri
Session S20: Undergraduate Session III
2:06 PM–3:18 PM,
Monday, April 14, 2008
Hyatt Regency St. Louis Riverfront (formerly Adam's Mark Hotel), Room: Director's Row 48
Sponsoring Unit: SPS
Chair: Kendra Rand, American Institute of Physics
Abstract ID: BAPS.2008.APR.S20.2
Abstract: S20.00002 : Using a Large Ring Laser Gyroscope (RLG) to Understand the Torsional Components of Near-Field Seismic Events*
2:18 PM–2:30 PM
Preview Abstract Abstract
(Hendrix SPS Chapter)
Seismographs are able to accurately measure translational components of seismic events, i.e. the North-South, East-West, and Up-Down (z) components. However, there has recently been a renewed interest in measuring the torsional components of such events. Preliminary results from a triangular, large ring laser (measuring 17 meters on a side) suggest that RLGs could be a vital tool in opening up this relatively unexplored aspect of seismology. The ring laser has produced data similar to that of seismographs in response to three near-field earthquakes in Tennessee, the Gulf of Mexico, and Mexico. In addition to this, Fourier analysis of voltage variations caused by perturbations of the ring laser during these near-field events has yielded several interesting results not given by traditional seismographs. These results include the increased effectiveness of RLGs for near-field measurements versus far-field, the torsional resonances excited by the detected earthquakes, and perhaps the mechanism which generates torsion in an earthquake. The ring laser's results, their implications, and a potential model will be presented.
*Gracious acknowledgement is due to the National Science Foundation and the Arkansas Space Grant Consortium.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2008.APR.S20.2
The American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics.
1 Physics Ellipse, College Park, MD 20740-3844
Editorial Office 1 Research Road, Ridge, NY 11961-2701 (631) 591-4000
Office of Public Affairs 529 14th St NW, Suite 1050, Washington, D.C. 20045-2001 (202) 662-8700