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Abstract
Travel time-distance curves are plotted using seismic events recorded by Q330 broadband seismic station in Baghdad. Three component STS-2 seismometers record 132, 97 events represented the first arrival of Pn, Sn, respectively for the period between 2010 to January 2015. The minimum and maximum hypocentral distance for these events are 129 and 650 Km, respectively, their magnitudes range between (3.5 – 6.4) on the Richter scale. The velocity of the upper mantle has been calculated using travel time-distance curve, the velocity values are 8.13,4.49 km/s for Pn, Sn, respectively. The standard deviation (SD) are 1.211, 1.556 and Correlation coefficient R2 = 0.9965, 0.9982 for Pn and Sn respectively, VP/VS-ratio beneath seismic Baghdad station is 1.807.
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