Usgs.gov Travel

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Travel - USGS

Details: Aug 28, 2020  · Travel Expense Acceptance Pursuant to 31 U.S.C. § 1353. This law allows Executive Branch agencies to accept reimbursement or in-kind donations from non-Federal sources for an employee’s transportation expenses (including food, lodging, incidental expenses, and registration costs) to certain functions related to the employee’s official ...

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Travel, Transportation, and Relocation Expenses

Details: Aug 20, 1999  · Travel, Transportation, and Relocation Expenses. August 20, 1999. The Department of the Interior recently issued Personnel Bulletin No. 99-6 (500), which establishes Departmental policy regarding payment of travel, transportation, and relocation expenses for new appointees and for employees transferred in the interest of the government or ...

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340.1 – Temporary Duty Travel

Details: Dec 23, 2014  · Travel authorizations (TA) must be issued in advance of travel and approved at least one supervisory level above the traveler. The TA constitutes the legal basis for performing the travel. The TA includes the purpose, place, dates, conditions, limitations, allowances, and estimated costs of the travel, as well as accounting information.

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370-572.2 - Travel and Transportation Expenses - New ...

Details: May 07, 1993  · A. Travel Expenses. Travel and transportation expenses for new appointees will be authorized and travel will be undertaken in accordance with travel regulations issued by the General Services Administration (41 CFR Chapters 301-304 and SM 340.7). B. Management Consideration of Approval Requests.

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Compensatory Time Off for Travel - USGS

Details: If travel during regularly scheduled work hours is not possible, supervisors may authorize compensatory time off in accordance with the guidance issued by the Office of Human Resources Management (OPM). For information about what qualifies as time in travel status and the restrictions of this new provision, see OPM’s interim regulations.

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Earthquake Travel Times - USGS

Details: P and S-P travel times as a function of source distance for an earthquake 33 km deep. The Time of the first arriving P phase is given, along with the time difference between the S and P phases. The latter time is known as the S minus P time. This table is based on the iasp91 model of Kennett and Engdahl (1991) and was generated with the program ...

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How far do salmon travel? - USGS

Details: Salmon first travel from their home stream to the ocean, which can be a distance of hundreds of miles. Once they reach the ocean, they might travel an additional 1,000 miles to reach their feeding grounds.Learn more: Questions and Answers about Salmon

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How far did the ash from Mount St. Helens travel?

Details: How far did the ash from Mount St. Helens travel? The May 18, 1980 eruptive column at Mount St. Helens fluctuated in height through the day, but the eruption subsided by late afternoon. By early May 19, the eruption had stopped. By that time, the …

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Federal Employees Health Benefits (FEHB) Program

Details: All nationwide FEHB plans offer international coverage. The government pays about 70% of the premium cost. You’re saving money on premiums since they are pre-tax (premium conversion) You are automatically under premium conversion unless you elect to waive it. Open Season is an annual event that allows changes to FEHB.

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Pyroclastic flows move fast and destroy everything in ...

Details: Pyroclastic flows destroy nearly everything in their path. With rock fragments ranging in size from ash to boulders that travel across the ground at speeds typically greater than 80 km per hour (50 mph), pyroclastic flowsknock down, shatter, bury or …

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How far would ash travel if Yellowstone had a large ...

Details: How far did the ash from Mount St. Helens travel? The May 18, 1980 eruptive column at Mount St. Helens fluctuated in height through the day, but the eruption subsided by late afternoon. By early May 19, the eruption had stopped. By that time, the ash cloud had spread to the central United States. Two days later, even though the ash cloud had ...

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Volcano Watch — The Canary Islands “mega-tsunami ...

Details: Oct 21, 2021  · Studies of landslide-induced waves show that they travel at different speeds and interact more across long distances, leading to smaller wave height far from their sources. Better knowledge of ocean bathymetry, island and coastal topography, and the transfer of energy between slide blocks and water also contributed to more accurate modeling.

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Delineation of areas contributing groundwater and travel ...

Details: Oct 01, 2021  · Using a uniform porosity of 25 percent, simulated recent condition travel times ranged from less than 2 years to greater than 10,000 years and were visualized in 11 travel time intervals. About 85 percent of particle travel times from the water table to points of discharge are less than 100 years.

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Simulation of groundwater budgets and travel times for ...

Details: Median travel times for the HUC12 watersheds ranged from 0.9 to 53.5 years, with a median of 1.8 years. Among HUC12 watersheds that include coastal areas, travel times for groundwater discharging to coastal waters ranged from less than 1 to 61.6 years, with a median of 2.8 years.

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Estimating the Variation of Travel Time in Rivers by Use ...

Details: 16. Predicted and observed total travel time of each time-of-travel study listed in table A-2 23 TABLES 1. Celerity and flow for waves in the New River between Hinton and Thurmond, West Virginia 9 2. Time-of-travel data for the New River between Sandstone and …

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Seismographs - Keeping Track of Earthquakes

Details: This method, however, requires that travel-time tables be available for various depths of focus. For locating a deep shock, one 700 kilometers deep, for example, travel-time tables and travel-time curves for that depth have to be used to calculate the origin time and distances.

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Contributing recharge areas, groundwater travel time, and ...

Details: The U.S Geological Survey, in a cooperative study with the City of Independence, Missouri, simulated steady-state groundwater flow for 2007 well pumpage, average annual river stage, and average annual recharge. Particle-tracking analysis was used to determine the CRA for supply wells and monitoring wells, and the travel time from recharge areas ...

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Measurement of Time Of Travel In Streams By Dye Tracing

Details: U.S. Geological Survey, Techniques of Water-Resources Investigations 3-A9 [version 2] by F.A. Kilpatrick, and J.F. Wilson, Jr. This report is available as a pdf below. This manual is a revision of "Measurement of Time of Travel and Dispersion in Streams by Dye Tracing," by E.F .

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Basic Seismology: Some Theory and Observations

Details: more information than travel-times alone (amplitudes are very sensitive to velocity gradients) and are now readily available in digital form. The current state of the art involves synthetic seismogram modeling of the entire waveform, and seismic tomography, 3-D inversions of large datasets of travel-time residuals

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Volunteer For Science Handbook - USGS.gov | Science for a ...

Details: Proper travel procedures must be followed and approvals obtained in accordance with SM 340.1, Authority for Travel, and SM 205.2, Travel Delegations. Supervisors should consult the administrative staff or the Office of Accounting and Financial Management for …

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Effects of land use and travel time on the distribution of ...

Details: Effects of Land Use and Travel Time on the Distribution of Nitrate in the Kirkwood-Cohansey Aquifer System in Southern New Jersey. U.S. Geological Survey Water-Resources Investigations Report 01-4117 . National Water-Quality Assessment Program . By Leon J. Kauffman, Arthur L. Baehr, Mark A. Ayers, and Paul E. Stackelberg

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Application of hydrogeology and groundwater-age estimates ...

Details: The U.S. Geological Survey used interpretations of hydrogeologic conditions and tritium-based groundwater age estimates to assess the travel time of groundwater at a landfill site near Clinton, Illinois (the “Clinton site”) where a chemical waste unit (CWU) was proposed to be within the Clinton landfill unit #3 (CLU#3). Glacial deposits beneath the CWU consist predominantly of …

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Scientific Investigations Report 2010–5232: Contributing ...

Details: Monitoring wells 14a and 14b have the shortest groundwater travel time from their contributing recharge area of 0.30 years and monitoring well 29a has the longest maximum groundwater travel time from its contributing recharge area of 1,701 years. Monitoring well 22a has the shortest groundwater travel time of 0.5 day to supply well 44 and ...

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M 7.1 - South Sandwich Islands region

Details: Aug 22, 2021  · Tectonic Summary. The August 22, 2021 M 7.1 earthquake in the South Sandwich Islands occurred as the result of normal faulting at approximately 14 km depth in the Scotia subduction zone. The focal mechanism solution indicates slip occurred on either a shallowly dipping fault striking north-northeast and dipping to the southeast, or on a steeply ...

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Accounting for temporal variability of streamflow in ...

Details: Retention, processing, and transport of solutes and particulates in stream corridors are influenced by the travel time of streamflow through stream channels, which varies dynamically with discharge. The effects of streamflow variability across sites and over time cannot be addressed by time-averaged models if parameters are based solely on the characteristics of mean streamflow.

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Tsunami Generation from the 2004 M=9.1 Sumatra-Andaman ...

Details: Dec 26, 2004  · Tectonics of Sumatra-Andaman Islands. The December 26, 2004 M=9.1 Sumatra-Andaman earthquake occurred along a tectonic subduction zone in which the India Plate, an oceanic plate, is being subducted beneath the Burma micro-plate, part of the larger Sunda plate.. The interface between the two plates results in a large fault, termed an interplate thrust or …

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Nonlinear refraction and reflection travel time tomography

Details: We develop a rapid nonlinear travel time tomography method that simultaneously inverts refraction and reflection travel times on a regular velocity grid. For travel time and ray path calculations, we apply a wave front method employing graph theory. The first-arrival refraction travel times are calculated on the basis of cell velocities, and the later refraction and reflection …

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