Manual del McVCO 1999
P.J. McChesney
1999, Open-File Report 99-361-S
El McVCO es un generador de frecuencias basado en un microcontrolador que reemplaza al oscilador controlado por voltaje (VCO) utilizado en telemetría analógica de datos sísmicas. Acepta señales de baja potencia desde un sismómetro y produce una señal subportadora modulada en frecuencia adecuada para enlaces telefónicos o vía radio a...
Measurements of Taku River, Alaska during Tulsequah Lake outburst floods
Randy H. Host, Joseph M. Dorava
1999, Fact Sheet 131-99
U.S. Geological Survey Activities Related to American Indians and Alaska Natives Fiscal Year 1998
Water Resources Division, U.S. Geological Survey
1998, Report
IntroductionThe U.S. Geological Survey (USGS) is an impartial scientific organization that strives to produce scientific results that are relevant to the people of the United States and their land and resource managers. In cooperation with American Indian and Alaska Native governments, the USGS conducts research on water and mineral resources,...
Geobotanical aspects of Simeonof Island, Shumagin Islands, southwestern Alaska
F.J.A. Daniels, Stephen S. Talbot, Sandra L. Talbot, W.B. Schofield
1998, Berichte der Reinhold-Tuexen-Gesellschaft (10) 125-138
First breeding records of whooping swan and brambling in North America at Attu Island, Alaska
P.W. Sykes Jr., D.W. Sonneborn
1998, Condor (100) 162-164
We document the first breeding records of Whooper Swan (Cygnus cygnus) and Brambling (Fringilla montifringilla) in Alaska and North America on Attu Island in the Western Aleutians in the spring of 1996. Five cygnets were seen with adults and the nest located, and a territorial pair of Bramblings was...
Blood changes in mallards exposed to white phosphorus
Donald W. Sparling, S. Vann, Robert A. Grove
1998, Environmental Toxicology and Chemistry (17) 2521-2529
White phosphorus (P4) has been extensively used by the military for various purposes, including marking artillery impacts and as an obscurant. Target practice in an Alaskan tidal marsh during the last 4 decades has deposited large amounts of P4 particles in sediments and water, which have resulted in die-offs of...
Evaluation of age determination techniques for gray wolves
D.B. Landon, C.A. Waite, R. O. Peterson, L.D. Mech
1998, Journal of Wildlife Management (62) 674-682
We evaluated tooth wear, cranial suture fusion, closure of the canine pulp cavity, and cementum annuli as methods of age determination for known- and unknown-age gray wolves (Canis lupus) from Alaska, Minnesota, Ontario, and Isle Royale, Michigan. We developed age classes for...
Caribou antlers as nest materials for golden eagles in northwestern Alaska
D. H. Ellis, R.L. Bunn
1998, Journal of Raptor Research (32) 268
There are few published records of antlers in golden eagle (Aquila chrysaetos) nests. This note reports extensive use of caribou (Rangifer tarandus) antlers in three golden eagle nests in the Cape Kruzenstern region of northwestern Alaska. The importance of antlers to this population of eagles can be explained...
Geologic map of central (interior) Alaska
Frederic H. Wilson, James H. Dover, Dwight Bradley, Florence R. Weber, Thomas K. Bundtzen, Peter J. Haeussler
1998, Open-File Report 98-133-B
No abstract available....
Alaska resource data file: Teller quadrangle
Travis Hudson
1998, Open-File Report 98-328
No abstract available....
Alaska resource data file: McCarthy quadrangle
Donald Richter
1998, Open-File Report 98-227
Descriptions of the mineral occurrences shown on the accompanying figure follow. See U.S. Geological Survey (1996) for a description of the information content of each field in the records. The data presented here are maintained as part of a statewide database on mines, prospects and mineral occurrences throughout Alaska....
Alaska resource data file: Lake Clark quadrangle
Damon P. Bickerstaff
1998, Open-File Report 98-359
No abstract available....
Alaska resource data file: Bradfield Canal quadrangle
Henry C. Berg
1998, Open-File Report 98-327
No abstract available....
Effects of human activity on brown bear use of the Kulik River, Alaska
Tom S. Smith
1998, Ursus (13) 257-267
I systematically observed brown bear (Ursus arctos) and human activity on a sockeye salmon (Oncorhynchus nerka) stream in Katmai National Park during fall 1993 and 1995. More than 700 hours of observations were used to determine the temporal and spatial use patterns by people and bears as well as the...
Effects of ice formation on hydrology and water quality in the lower Bradley River, Alaska — Implications for salmon incubation habitat
Ronald L. Rickman
1998, Water-Resources Investigations Report 98-4191
A minimum flow of 40 cubic feet per second is required in the lower Bradley River, near Homer, Alaska, from November 2 to April 30 to ensure adequate habitat for salmon incubation. The study that determined this minimum flow did not account for the effects of ice formation on habitat....
Estimate of aquifer properties by numerically simulating ground-water/surface-water interactions, Fort Wainwright, Alaska
Allen S. Nakanishi, Michael R. Lilly
1998, Water-Resources Investigations Report 98-4088
MODFLOW, a finite-difference model of ground-water flow, was used to simulate the flow of water between the aquifer and the Chena River at Fort Wainwright, Alaska. The model was calibrated by comparing simulated ground-water hydrographs to those recorded in wells during periods of fluctuating river levels. The best fit between...
Geologic map of central (interior) Alaska
Frederic H. Wilson, James H. Dover, Dwight Bradley, Florence R. Weber, Thomas K. Bundtzen, Peter J. Haeussler
1998, Open-File Report 98-133-A
Introduction: This map and associated digital databases are the result of a compilation and reinterpretation of published and unpublished 1:250,000- and limited 1:125,000- and 1:63,360-scale mapping. The map area covers approximately 416,000 sq km (134,000 sq mi) and encompasses 25 1:250,000-scale quadrangles in central Alaska. The compilation was done...
Alaska resource data file: Tyonek quadrangle
Madelyn Millholland, J.R. Riehle
1998, Open-File Report 98-525
No abstract available....
Alaska resource data file: Circle quadrangle
C. J. Freeman, Janet Schaefer
1998, Open-File Report 98-783
No abstract available....
Alaska resource data file: Anchorage quadrangle
D P. Bickerstaff, S. W. Huss
1998, Open-File Report 98-599
No abstract available....
Alaska resource data file: Saint Lawrence quadrangle
T. L. Hudson
1998, Open-File Report 98-786
No abstract available....
Alaska resource data file: Petersburg quadrangle
D. J. Grybeck, Henry C. Berg
1998, Open-File Report 98-784
No abstract available....
Alaska resource date file: Talkeetna Mountains quadrangle
J.R. Riehle
1998, Open-File Report 98-473
No abstract available....
Physical characteristics of dungeness crab and halibut habitats in Glacier Bay
Guy R. Cochrane, Paul R. Carlson, Jane F. Denny, Michael E. Boyle, S. James Taggart, Philip N. Hooge
1998, Open-File Report 98-791
In Glacier Bay National Park, Alaska there are ongoing studies of Dungeness Crab (Cancer magister) and Pacific Halibut (Hippoglosus stenolepis). Scientists of the United States Geological Survey (USGS) are attempting to ascertain life history, distribution, and abundance, and to determine the effects of commercial fishing in the park (Carlson et...
Catalog of the historically active volcanoes of Alaska
T. P. Miller, R. G. McGimsey, D.H. Richter, J.R. Riehle, C.J. Nye, M. E. Yount, Julie A. Dumoulin
1998, Open-File Report 98-582
Alaska hosts within its borders over 80 major volcanic centers that have erupted during Holocene time (< 10,000 years). At least 29 of these volcanic centers (table 1) had historical eruptions and 12 additional volcanic centers may have had historical eruptions. Historical in Alaska generally means the period since 1760...
