Hvsr Technique for Burried Monuments Delineation at Saqqara (zoser) Pyramid

Saqqara pyramid lies to the south west of Cairo near the epicenter of Cairo earthquake that took place on 12 October 1992. The Pyramid is severely damaged by the earthquake with epicenter at about 14 km away. As a result numerous efforts are exerted to restore the pyramid and to prevent it from total collapse. The current work is motivated by such efforts with focus on the potential of using the spectral ratio method (HVSR) to define subsurface monuments. HVSR method is based on the spectral analyses of recorded ambient method. The ambient noise in front of the southern side of the pyramid is recorded at 15 sites. The sites selected are 9 m apart with a time window of 5 minutes on average. Array shape and dimensions is chosen based on the prior information about the location and extension of the tunnel underneath. The tunnel extended about 20 m underneath the area adjacent to the southern gate of the pyramid. The estimated fundamental frequencies and peak amplitudes are contoured showing some low value trends at the area adjacent to the southern gate. This may lead to the possibilities of the HVSR method to explore the subsurface monuments. However, this statement is still in the early stage and further theoretical investigation is required. [Amin E. Khalil. HVSR TECHNIQUE FOR BURRIED MONUMENTS DELINEATION AT SAQQARA (ZOSER) PYRAMID. J Am Sci 2012; 8(8):8-15]. (ISSN: 1545-1003). http://www.jofamericanscience.org. 2