... a single point source, precisely known in time and place. Composite P-wave travel times are presented in a graphical form and, in the distance range from 3 to 102 degrees, are represented as eight near straight-line segments. P-wave speeds in the top of the mantle average about 8.2 km/sec to distances...

..., in general, be subject to out of phase motion. The response of such inflow, outflow or connection piping to wave propagation is a function of the connection between the pipe and the tank. Three simplified end con- ditions or connection types will be considered herein; a free end, a pinned end and a spring...

..., Lsd. 4, Sec. 10, T. 50, R. 23, W. 4 M. Fig. 2. —Typical Upper Devonian of Edmonton area. As shown in Figure 2 , the Beaverhill Lake is the lowermost formation of the Upper Devonian sequence in the Edmonton area. It overlies the Middle Devonian Elk Point group ( McGehee, 1954...

.... This phenomenon is known as the flux pinning effect. The pinned magnetic field stays where it is trapped and generates an attractive force that suspends the permanent magnet in the proof mass. The proof mass levitates at the equilibrium point as a result of this attractive force and other external forces due...

... EARTHQUAKE GROUND MOTIONS:ANALYSIS USING ISOCHRONETHEORY 2972601 points at a spacing of 4 km. These calculations were done for a period of 5 sec. For the vertical strike-slip fault (the geometry of event SD, Table 1), the isochrone di- rectivity in general resembles the predictions of SSGA but predicts much...

... Figure6. NW SE 1615 14 13 12 II I0 9 8 "7 54 3 2, AA A A A AA A A A AA A 4.60 4.6° 31 5.68 A GEOPHONE 0 I @ SHOT i. I K~ ometer FIG. 6. Layered crustal velocity model for Stone Canyon. P-wave velocities in km/sec. No vertical exaggeration. km/sec refractor was plotted at the takeoff point...

...-point Vibroseis signal in 50 sec. This low cost field portable system allows real time data quality control, easy uphole/downhole communications, and compact mass storage. SONDE PERFORMANCE Two key elements in satisfactory sonde performance are the force with which the sonde is pinned to the borehole...

... associated with Sverdrup Basin evo South BEVERLEY INLET MECHAM RIVER ROBERTSON POINT CONSETT HEAD REA POINT . . . . . . . . . . . . l~ ~ North ANTICLINE ANTICLINE ANT CL NE ANTICLINE ANTICLINE Ml~rl/~t, u ol~M ~ "" . . . . SPENCER RANGE ~ui tin u - -" - P'n 4 ~ ~ Pin 5 ~ ~ Pin 6 Pin 7 ~ l~/ l~ l , I . Pm S...