A5017254479- Geomagnetism and Paleomagnetism Studies
- Earthquake Detection and Analysis
- Solar and Space Plasma Dynamics
- Geophysical and Geoelectrical Methods
- Geophysics and Gravity Measurements
- Magnetic and Electromagnetic Effects
- Geological Studies and Exploration
- Geological and Geochemical Analysis
- Geology and Paleoclimatology Research
- Geotechnical and Geomechanical Engineering
- High-pressure geophysics and materials
- Astro and Planetary Science
National Academy of Sciences of Armenia
2009-2023
Institute of Geophysics
1989
Abstract The geomagnetic field is chaotic and can be characterized by a mean exponential time scale < τ > after which it no longer predictable. It also ergodic, so analyses substitute the more difficult phase space analyses. Taking advantage of these two properties Earth's magnetic field, scheme processing global models in presented, to estimate fluctuations τ. Here considering that capability predict reduced over periods jerks, we propose method detect events long span. This approach...
Abstract Examination of the annual mean values geomagnetic elements from world net magnetic observatories shows that jerks took place in 1937, 1947, 1958, 1969. Eleven year smoothing and straight line approximations first derivatives were used to analyse components. To determine ability this technique deciding whether secular acceleration is constant between epochs, spherical harmonic analysis these components performed. It shown square field a jerk assumes quite reasonable magnitudes for...