Attenuation relationships of peak ground motions in the Jazan Region

Abstract In this study, attenuation relationships are proposed to more accurately predict ground motions in the southernmost part of Arabian Shield Jazan Region Saudi Arabia. A data set composed 72 earthquakes, with normal strike-slip focal mechanisms over a local magnitude range 2.0–5.1 and distance 5–200 km, was used investigate predictive relationship peak motion as function hypocentral magnitude. To obtain space parameters empirical relationships, non-linear regression performed 4–200 km. The means 638 acceleration (PGA) velocity (PGV) values calculated from records horizontal components were derive earthquake motions. accounted for site-correlation coefficient but not source implications. derived PGV PGA $$ {\log}_{10}(PGV)=-1.05+0.65\cdotp {M}_L-0.66\cdotp {\log}_{10}(r)-0.04\cdotp r, log10PGV=?1.05+0.65·ML?0.66·log10r?0.04·r, {\log}_{10}(PGA)=-1.36+0.85\cdotp {M}_L-0.85\cdotp {\log}_{10}(r)-0.005\cdotp xmlns:mml="http://www.w3.org/1998/Math/MathML">log10PGA=?1.36+0.85·ML?0.85·log10r?0.005·r, respectively. These new compared grand-motion prediction equation published western Arabia indicate good agreement only observed available an M L 4.9 that occurred 2014 southwestern Arabia, implying developed can be generate shaking maps within few minutes event based on prior information magnitudes distances taking into considerations site characteristics.