In contrast, VanDeMark (2006) used few events, a double-difference methodology and a uniform velocity model for Rayleigh waves in calculating revised earthquake locations along the Eltanin transforms. In discriminating the signals of earthquakes from those of underground nuclear explosions low excitation of Rayleigh waves in the narrow period band used for determining Ms may result in a few earthquakes appearing to be explosions. The San Andreas fault is part of a fault zone known as a transform Eltanin fracture zone_Eltanin fracture zone_ His relocations are shown in Figs 4-6 in green. The San Andreas Fault zone of western North America. This transform migration was preceded by a process 2517 Ma during which the Miocene shallow-water platform mentioned above reached sea level as the transverse ridge was first uplifted, then deformed, and finally buried under the sea. We first examine an unusual case of repeatability of shocks of nearly the same Mw, 6.0. He found that interevent times for those pairs was tightly clustered around 5 yr with a COV ~ 0.2. Romanche Trench - Wikipedia In the basin on the eastern side of the MAR the Walvis Ridge blocks the northward passage. We note that our revised catalogue with its additions of more solutions, especially of Mw 5.5-6.0, is more complete than the existing CMT catalogue. They are the scars on the seafloor basalt that are created by offsets in the mid-ocean ridge. florida a jurassic transform plate boundary. If those segments are not fully coupled, our calculations of downdip width, of course, are minimum estimates. (1993) find that a 10 clockwise rotation of magnetic anomalies north of the Heezen transform occurred within the last 4 Ma, which would put it in extension. The solutions, additional methodology and other pertinent data are described more fully in Appendix A and the Supporting Information. We used a 97-km length of the Hollister that includes all large shocks (Fig. COV = 0 and 1.0 correspond to strict periodicity and random occurrence, respectively. It moves 4065 km S of Avarua, Cook Islands / pop: 13,373 / local time: 16:34:59.2 2016-05-02 Although 1988). That Ms was obtained using a single station. slip fault zone between the Caribbean and North American (2005). -Different segments of the mid-ocean ridge system spreading at different rates. Mw determined in this study compared with the surface wave magnitude Ms as computed by either ISC or PDE for periods between about 17 and 22 s. Mw is determined at longer periods. [2], The trench has a depth of 7,761m (25,463ft), is 300km (190mi) long and has an average width of 19km (12mi) and allows for a major circulation of deep ocean basin water from the west Atlantic to the east Atlantic basins. Ryan . E. W. F. (2010) that describes the relative motion of the Pacific and Antarctic plates. A.M. Fracture Zone. What kind of fault is represented by the eltanin and romanche fracture

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