- Ground-motion model is:
where a

_{max}is in gal, a_{1}= 2.8, a_{2}= 0.9, a_{3}= -0.025 and a_{4}= 1 (σ is not given). - Most records from r
_{hypo}> 20km. - Note that data from Turkey is limited and hence equation may be refined as amount of data increases.
- Also give equation to estimate ratio of vertical PGA (a
_{v}) to horizontal PGA (a_{h}): a_{v}∕a_{h}= 0.217+0.046M_{s}(σ is not given).