CRUSTAL STRUCTURE UNDER HUDSON BAY

1967 ◽  
Vol 4 (5) ◽  
pp. 929-947 ◽  
Author(s):  
George D. Hobson ◽  
A. Overton ◽  
D. N. Clay ◽  
W. Thatcher
Keyword(s):  
Crustal Structure ◽  
Quality Data ◽  
Hudson Bay ◽  
Sufficient Data ◽  
Crustal Model ◽  
Time Term ◽  
Mohorovičić Discontinuity ◽  
Good Quality Data

A crystal refraction experiment was conducted in August 1965 in Hudson Bay in which nine university and government crews participated. Good quality data were obtained from 41 shots providing sufficient data to permit time-term analyses of both Pn and P1 arrivals. No consistent intermediate arrivals were identified leading to the consideration of a two-layer crustal model. Pn time-terms indicate that the depth of the Mohorovicic discontinuity is between 26 and 41 km.

HUDSON BAY CRUSTAL SEISMIC EXPERIMENT: TIME AND DISTANCE DATA

1967 ◽  
Vol 4 (5) ◽  
pp. 879-899 ◽  
Author(s):  
George D. Hobson
Keyword(s):  
Preliminary Data ◽  
Quality Data ◽  
Hudson Bay ◽  
Travel Times ◽  
Central Location ◽  
Seismic Experiment ◽  
Comprehensive Survey ◽  
Distance Data ◽  
Good Quality Data

A crustal refraction experiment was shot in August 1965 in Hudson Bay as part of a comprehensive survey encompassing the fields of geophysics, geology, and oceanography. Nine university and government crews participated. Eight stations were located on the periphery of the bay, while telemetering sonobuoys were monitored at a central location in the bay. Good quality data were obtained from 41 shots. All preliminary data pertaining to participants, instrumentation, shot times and distances, travel times, etc. are tabulated in this report.

THE CRUST OF THE EARTH UNDER HUDSON BAY

1967 ◽  
Vol 4 (5) ◽  
pp. 949-960 ◽  
Author(s):  
J. A. Hunter ◽  
R. F. Mereu
Keyword(s):  
Crustal Thickening ◽  
Hudson Bay ◽  
Near Surface ◽  
Crustal Velocity ◽  
Surface Data ◽  
First Arrival ◽  
Minimum Depth ◽  
Time Term ◽  
Surface Geology ◽  
Mohorovičić Discontinuity

The Hudson Bay crustal experiment of 1965 involved 41 shots placed on two lines, E–W and NW–SE, in the Bay. The first arrival data of eight land stations situated around the bay were utilized in the time–term analysis. The preferred crustal velocity was found to be 6.32 ± .06 km/s, and the velocity of the upper mantle to be 8.23 ± .03 km/s. Depth calculations from time–terms and employing Geological Survey of Canada near-surface data, show the Mohorovicic discontinuity to be undulatory in nature throughout the bay. An overall rise of this interface occurs from a depth at Churchill of approximately 41 km to a minimum depth of approximately 27 km towards Gilmour Island. Crustal thickening occurs again on the east side of the bay, with a depth of 41 km at Povungnituk. As well, the crust thins towards the NW from an approximate depth of 37 km in the center to a depth of 26 km near Chesterfield Inlet. The correlation between existing surface geology and the Mohorovicic discontinuity undulations is discussed.

A TIME-TERM ANALYSIS OF THE FIRST ARRIVAL DATA FROM THE SEISMIC EXPERIMENT IN HUDSON BAY, 1965

1967 ◽  
Vol 4 (5) ◽  
pp. 901-928 ◽  
Author(s):  
Alan Ruffman ◽  
M. J. Keen
Keyword(s):  
Wave Velocity ◽  
Three Dimensional ◽  
Compressional Wave ◽  
Hudson Bay ◽  
Compressional Wave Velocity ◽  
Seismic Experiment ◽  
First Arrival ◽  
Time Term ◽  
Mohorovičić Discontinuity ◽  
Term Analysis

A time-term analysis is made of the first arrival data from the 41 shots of the1965 Hudson Bay seismic experiment. An investigation of the water-wave data is made to determine which of three possible series of navigation is most consistent. A single-layered crust with a compressional wave velocity of 6.33 km/s and an upper mantle compressional wave velocity of 8.27 km/s are proposed for Hudson Bay. The Mohorovičić discontinuity is found to have considerable topography with depths ranging from 42.7 km to less than 26 km. The Churchill–Superior boundary is proposed to be a three-dimensional crustal feature and is extended offshore from Cape Smith and extended westward to the north of the Ottawa Islands through approximately 59° 40′ N and 82° 00′ W. The Mohorovičić discontinuity rises to depths of about 26 km beneath Chesterfield Inlet and Baker Lake. The mantle is about 40 km deep at Churchill, Manitoba and rises to about30 km some 130 km west of Gilmour Island, then drops to almost 42 km farther east. The sudden drop is related to the Churchill–Superior boundary.

Thermodynamics of Adsorption of Alcohol Dehydrogenase on Gold Nanoparticle Surface: A Model Based Analysis Versus Direct Measurement

2021 ◽  
Author(s):  
Akriti Mishra ◽  
Kamini Mishra ◽  
Dipayan Bose ◽  
Abhijit Chakrabarti ◽  
Puspendu Kumar Das
Keyword(s):  
Alcohol Dehydrogenase ◽  
Gold Nanoparticle ◽  
Protein Interaction ◽  
Protein Corona ◽  
Quality Data ◽  
Nanoparticle Surface ◽  
Tremendous Importance ◽  
Good Quality Data ◽  
Model Based Analysis

Characterization of nanoparticle protein corona has gained tremendous importance lately. The parameters which quantitatively establish a specific nanoparticle-protein interaction need to be measured accurately since good quality data is necessary...

A seismic investigation of crustal structure in the Western Transvaal*

1952 ◽  
Vol 42 (1) ◽  
pp. 53-80
Author(s):  
P. L. Willmore ◽  
A. L. Hales ◽  
P. G. Gane
Keyword(s):  
Crustal Structure ◽  
Intermediate Layer ◽  
Continuous Recording ◽  
Travel Times ◽  
Local Anomaly ◽  
Seismic Investigation ◽  
Regular Increase ◽  
Mohorovičić Discontinuity ◽  
Epicentral Region

Abstract Travel times are given as obtained from seismograms of the Witwatersrand earth tremors at distances up to 500 km. Five stations of several types were operated, which were moved as required. One method used continuous recording for a few hours daily; another used a triggering technique operated by radio from Johannesburg, where a network of six stations permitted the focus of each tremor to be located in time and place. Readings from the 200 seismograms obtained give velocities V1 = 6.09 km/sec. and Vn = 8.27 km/sec. for the P1 and Pn phases, and v1 = 3.68 km/sec., vn = 4.83 km/sec., for the corresponding S phases. Simply interpreted, these lead to a depth of 36 km. to the Mohorovičić discontinuity, including 5 km. of sediments confined to the epicentral region. There is evidence of a phase corresponding to an intermediate layer (the inclusion of which brings the total depth to 39 km.), but the data can also be interpreted to imply a regular increase of velocity with depth in the upper layer, as the presence of a local anomaly.

Aerosol Assimilation of lidar data from Satellite (AEOLUS) and Ground-based (EARLINET) instruments in COMPO-IFS.

2021 ◽  
Author(s):  
Julie Letertre-Danczak ◽  
Angela Benedetti ◽  
Drasko Vasiljevic ◽  
Alain Dabas ◽  
Thomas Flament ◽  
...  
Keyword(s):  
Quality Data ◽  
Lidar Data ◽  
Operational Model ◽  
Weather Forecasts ◽  
The Past ◽  
Medium Range ◽  
First Results ◽  
Monitoring Service ◽  
The Vertical Distribution ◽  
Good Quality Data

<p>Since several years, the number of aerosol data coming from lidar has grown and improved in quality. These new datasets are providing a valuable information on the vertical distribution of aerosols which is missing in the AOD (Aerosol Optical Depth), which has been used so far in aerosols analysis. The launch of AEOLUS in 2018 has increased the interest in the assimilation of the aerosol lidar information. In parallel, the ground-based network EARLINET (European Aerosol Research LIdar NETwork) has grown to cover the Europe with good quality data. Assimilation of these data in the ECMWF/CAMS (European Centre for Medium-range Weather Forecasts / Copernicus Atmosphere Monitoring Service) system is expected to provide improvements in the aerosol analyses and forecasts.<br><br>Three preliminary studies have been done in the past four years using AEOLUS data (A3S-ESA funded) and EARLINET data (ACTRIS-2 and EUNADIC-AV, EU-funded). These studies have allowed the full development of the tangent linear and adjoint code for lidar backscatter in the ECMWF's 4D-VAR system. These developments are now in the operational model version in research mode. The first results are promising and open the path to more intake of aerosol lidar data for assimilation purposes. The future launch of EARTHCARE (Earth-Cloud Aerosol and Radiation Explorer) and later ACCP (Aerosol Cloud, Convention and Precipitation) might even upgrade the use of aerosol lidar data in COMPO-IFS (Composition-Integrated Forecast system).<br><br>The most recent results using AEOLUS data (for October 2019 and April 2020) and using EARLINET data (October 2020) will be shown in this presentation. The output will be compared to the CAMS operational aerosol forecast as well as to independent data from AERONET (AErosol Robotic NETwork).</p>

Crustal structure southwest of the San Andreas fault from quarry blasts

1964 ◽  
Vol 54 (1) ◽  
pp. 67-77
Author(s):  
Robert M. Hamilton ◽  
Alan Ryall ◽  
Eduard Berg
Keyword(s):  
San Francisco ◽  
Crustal Structure ◽  
San Andreas Fault ◽  
P Wave ◽  
Geological Survey ◽  
San Andreas ◽  
Crustal Model ◽  
Crystalline Crust ◽  
The U.S

abstract To determine a crustal model for the southwest side of the San Andreas fault, six large quarry blasts near Salinas, California, were recorded at 27 seismographic stations in the region around Salinas, and along a line northwest of the quarry toward San Francisco. Data from these explosions are compared with results of explosion-seismic studies carried out by the U.S. Geological Survey on a profile along the coast of California from San Francisco to Camp Roberts. The velocity of Pg, the P wave refracted through the crystalline crust, in the Salinas region is 6.2 km/sec and the velocity of Pn is about 8.0 km/sec. Velocities of the direct P wave in near-sur-face rocks vary from one place to another, and appear to correlate well with gross geologic features. The thickness of the crust in the region southwest of the San Andreas fault from Salinas to San Francisco is about 22 kilometers.

scholarly journals Global AgeWatch Index and Insights

2020 ◽  
Author(s):  
Gibran Cruz-Martinez ◽  
Gokce Cerev
Keyword(s):  
Older People ◽  
Composite Index ◽  
Quality Data ◽  
Transformative Change ◽  
Middle Income ◽  
Middle Income Countries ◽  
Good Quality Data ◽  
Low And Middle Income

Global AgeWatch Index and Insights by HelpAge International aim to contribute to achievement of long-term transformative change in respect to ageing and the lives of older people by advocating for better production of timely and good quality data to inform policy and program response.The Global AgeWatch Index is a composite index that measures quality of life of older people, and ranks countries based on four domains – income security, health status, enabling environment and capability. The index was developed in partnership with Professor Asghar Zaidi. The index was published during 2013-2015.The Global AgeWatch Insights is a research-based advocacy tool that examines situation of older people in low- and middle-income countries, assesses availability of relevant data and evidence to support the analysis, and identification of policy actions. The Insights are produced in partnership with AARP. The reports were launched in 2018 are planned to be released every three years with a different thematic focus. The first report focuses on the inequities of the health systems in twelve low- and middle-income countries.

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