![]() Overall, there is a strong correspondence between the shape and location of low velocities in the Rayleigh wave velocity images, and geological and geophysical features. At longer periods, higher velocities creep in from the east and narrow the overall dimension defined by the lower velocities. There is a strong correspondence between a low in gravity near the Kirby Hills fault and low velocities from the ambient noise tomography. In the eastern part of the valley, the boundaries of the low-velocity zone and gravity anomaly are better aligned at longer periods (around 10.5 s) suggesting that the eastern edge of the gravity low is associated with deeper structure. At shorter periods around 5.5 s, the model's western boundary between low and high velocities closely follows regional fault geometry and the edge of a residual isostatic gravity low. In detail, the model shows several centers of low velocity that may be associated with gross geologic features such as faulting along the western margin of the Central Valley, oil and gas reservoirs, and large crosscutting features like the Stockton arch. Overall, low velocities in the middle of each image reflect the deeper sedimentary syncline in the Central Valley. Checkerboard tests of resolution, which are dependent on station density, suggest that the resolving ability of the array is reasonably good within the middle of the array with resolution between 0.2 and 0.4°. Cells of the model were about 5.6 km in either dimension. Smoothing using the first difference is applied. We calculated average group velocities for each period and inverted for deviations from the average for a matrix of cells that covered the study area. Dispersion curves were determined from 4 to about 18 s. Complex coherency between pairs of stations was stacked over 8 months to more than a year. Recordings from the vertical component of about 31 stations were processed to compute the spatial distribution of Rayleigh wave group velocities. As a prelude to a full shear-wave velocity model that can be used in computer simulations and further seismic hazard analysis, we report on the use of ambient noise tomography to build a fundamental mode, Rayleigh wave group velocity model for the region around the Sacramento/San Joaquin Delta in the western Central Valley, California. “Already, Leanne and Gary are having a great impact and impressing our consultants.If shaking from a local or regional earthquake in the San Francisco Bay region were to rupture levees in the Sacramento/San Joaquin Delta, then brackish water from San Francisco Bay would contaminate the water in the Delta: the source of freshwater for about half of California. An entire new training team will soon be unveiled. “We now have 23 support team members plus eight BDMs, and more roles to be announced shortly. He added: “In preparation for doubling sales this year, we are making our offer even better by doubling our BDM team. “It’s exciting times for our dynamic, growing brand and there are many more additional initiatives yet to be unveiled.” ![]() Not even when we were building our business from scratch were we employing people as fast as we are now. “We are growing at our fastest pace ever. “Following the success of our largest-ever conference, it is clear from our multiple initiatives that the new Not Just Travel is going to be making some big waves in travel this year. ![]() Paul Harrison, co-founder of Not Just Travel and its recruitment arm The Travel Franchise, said: “We firmly believe that Gary and Leanne’s appointment means Not Just Travel has the highest ratio of support team members to consultants in the industry. She was a regional engagement manager at P&O Cruises, having spent 24 years with Tui in various managerial roles, including creating one of the group’s most successful stores in Walsall. She has also worked as a regional sales manager for the Birmingham region of Hays Travel after the company acquired the Thomas Cook retail estate. Leanne Edwards was previously a BDM for the Hays Travel Independent Group consortium. Gary McIntyre has 20 years of experience gained from a career including as an account manager at Expedia, a BDM at Club Med, Wendy Wu and Funway and a store manager at Kuoni. Two new business development managers have joined Not Just Travel as part of a doubling in staff numbers over the past six months.
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