Geomagnetic Deep Sounding and Upper Mantle Structure in the Western United States
نویسندگان
چکیده
منابع مشابه
Receiver functions in the western United States, with implications for upper mantle structure and dynamics
[1] Investigations into mechanisms driving surface tectonics commonly search for mantle sources, but few observations constrain flow in the upper mantle and transition zone. Here variations in the upper mantle discontinuities at 410 km and 660 km below the western United States are revealed through mapping depths of compressional-to-shear wave conversions recorded by broadband seismometers. The...
متن کاملMantle structure beneath the western United States and its implications for convection processes
[1] We present tomographic images of the mantle structure beneath the western United States. Our Dynamic North America Models of P and S velocity structure (DNA07‐P and DNA07‐S) use teleseismic body waves recorded at ∼600 seismic stations provided by the Earthscope Transportable Array and regional networks. DNA07‐P and ‐S benefit from the unprecedented aperture of the network while maintaining ...
متن کاملUpper mantle P velocity structure beneath the Midwestern United States derived from triplicated waveforms
[1] Upper mantle seismic velocity structures in both vertical and horizontal directions are key to understanding the structure and mechanics of tectonic plates. Recent deployment of the USArray Transportable Array (TA) in the Midwestern United States provides an extraordinary regional earthquake data set to investigate such velocity structure beneath the stable North American craton. In this pa...
متن کاملdetermination of the electrical conductivity and temperature of the upper mantle using geomagnetic quiet-daily variations
the electrical conductivity of the earth is its physical parameter, which can be studied in global scales. the investigations of the earth's electrical conductivity are based on geomagnetic field variations. time variations of the geomagnetic field consist of long-term and short-term (transient) variations. external sources induce electric currents into the earth. the induced electric curr...
متن کاملHealth System Reform in the United States
In 2010, the United States adopted its first-ever comprehensive set of health system reforms in the Affordable Care Act (ACA). Implementation of the law, though politically contentious and controversial, has now reached a stage where reversal of most elements of the law is no longer feasible. The controversial portions of the law that expand affordable health insurance coverage to most U.S. cit...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of geomagnetism and geoelectricity
سال: 1970
ISSN: 0022-1392
DOI: 10.5636/jgg.22.97