Example of an amplitude-normalized airgun seismic record section (full length of the profile) for station 204 (Reftek). Vertical component; bandpass filter 2/4/20/25; reduction velocity 8 km s⁻¹; distance from the station in km. Top—wiggle trace (WT) plot, every 5th trace is plotted; bottom—variable area (VA) plot. Pg—first arrivals of crustal P waves; P_Cr—later crustal refracted P waves; Pn—refracted P waves beneath the Moho; PmP—Moho P-wave reflections. Note that PmP waves are clearer in the WT plot, and Pg waves are clearer in the VA plot. Parts marked by rectangles are plotted in Fig. 3.