. Collected reprints, Essa Institute for Oceanography. Oceanography 180 azimuth (9) 360 Fig. 6. Graph of least-squares solution versus 6 as 6 varies from 0° to 360° for assumed emergence angle <p = 0°. Arrival times to the net stations from various earthquake sources were computed from the Jeffreys-Bullen normal depth travel-time curve. The various time delays were then computed by (2) for various distances from each of the station pairs: Cm — ) DK COS (0 — aK) K = 1. ,6 (2) where: CK is the expected J-B time delay for Kth station pair for any azimuth m, and dA/dt is the recip
. Collected reprints, Essa Institute for Oceanography. Oceanography 180 azimuth (9) 360 Fig. 6. Graph of least-squares solution versus 6 as 6 varies from 0° to 360° for assumed emergence angle <p = 0°. Arrival times to the net stations from various earthquake sources were computed from the Jeffreys-Bullen normal depth travel-time curve. The various time delays were then computed by (2) for various distances from each of the station pairs: Cm — ) DK COS (0 — aK) K = 1. ,6 (2) where: CK is the expected J-B time delay for Kth station pair for any azimuth m, and dA/dt is the reciprocal of slope obtained from J-B travel-time curve (Jeffreys, 1962). These CK values, for distances from 30° to 95°, substituted into (1) relate various <p's for this distance range. Figure 7 shows a graph of <p versus distance. The curve is. 60 distance (degrees) Fig. 7. Graph of <p for various distances from Oahu array. Arrival times, computed from the Jeffreys-Bullen travel-time curve, were used in the least-squares method to obtain the angles. Assumed velocity of km/sec. Point <p = 57° was obtained for the LONGSHOT Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Institute for Oceanography; Atlantic Oceanographic Laboratories (U. S. ); Pacific Oceanographic Laboratories; United States. Environmental Science Services Administration. Research Laboratories. Washington, D. C. : U. S. Dept. of Commerce, Environmental Science Services Administration, Research Laboratories : For sale by the Supt. of Docs. , U. S. G. P. O.
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