Earth Sciences

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Ground Velocity Prediction Based on Shot Distance, Shot Size and Shot Site Environment Across the Main Ethiopian Rift
(Addis Ababa Universty, 2005-06) Abebe, Demisachew; Alemu, Abera (PhD)
Accurate Prediction of grand velocity is essential in determining seismic shot size which minimizes risk to nearby manmade structures yet still ensures acceptable signal-noise ratio at large distances. In our study ground velocity data from the 2003 EAGLE conducted across the Main Ethiopian Rift were compared with the semi-empirical ORIARD formula on either rare of the MER. The ORIARD formula predicts velocities for scaled distance greater than 1.85 km per kgl/2, but over predicts for velocities less than 1.85 km per kgl/2. However, within MER, the ORIARD formula predicts velocities between 2 and 8 scaled distances, but over predicts velocities of a scaled distance less than 2 km per kgl/2 while under predicts for a scaled distance greater than 8 km per kgl/2.