MICROTREMOR STUDIES ............

It is known that momentum value earthquake forms is the main reason of damages occuring in our buildings and that it increases and decreases according to ground characteristics. These increases and decreases result from geological structure of urban centre and changes in dynamic parameters of ground, which change depending on this structure.

Although microtremor studies conducted don’t demonstrate increase in momentum value faithfully , they present an important approach to damage distrubition as it will demonstrate that momentum value to form in ground will also increase in points, where magnification of ground is much. With its microtremor measures calculated with its 2004 model tool Vaytaş determines

• Natural tremor period of ground • Coefficeint of amortizing or magnifying earthquake • Granule tremor velocity • Effective ground momentum coefficient • Spectrum coefficient and Spectral momentum coefficient