The travel-time averaged shear-wave velocity to a depth of 30m (Vs30) below the Earth’s surface is widely used to classify sites in many building codes. Vs30 is also used to estimate site classification in recent ground-motion prediction equations (GMPEs). and the distribution of Vs30 has been mapped in a region or country. An alternative method has recently been proposed for evaluati... https://foldlyers.shop/product-category/tweezers/