Archeomagnetic Intensity Spikes: Global or Regional Geomagnetic Field Features?
نویسندگان
چکیده
منابع مشابه
Archeomagnetic Intensity Spikes: Global or Regional Geomagnetic Field Features?
Variations of the geomagnetic field prior to direct observations are inferred from archeoand paleomagnetic experiments. Seemingly unusual variations not seen in the present-day and historical field are of particular interest to constrain the full range of core dynamics. Recently, archeomagnetic intensity spikes, characterized by very high field values that appear to be associated with rapid sec...
متن کاملGeomagnetic spikes on the core-mantle boundary
Extreme variations of Earth's magnetic field occurred in the Levant region around 1000 BC, when the field intensity rapidly rose and fell by a factor of 2. No coherent link currently exists between this intensity spike and the global field produced by the core geodynamo. Here we show that the Levantine spike must span >60° longitude at Earth's surface if it originates from the core-mantle bound...
متن کاملRegional cosmic ray induced ionization and geomagnetic field changes
Cosmic ray induced ionization (CRII) is an important factor of outer space influences on atmospheric properties. Variations of CRII are caused by two different processes – solar activity variations, which modulate the cosmic ray flux in interplanetary space, and changes of the geomagnetic field, which affects the cosmic ray access to Earth. Migration of the geomagnetic dipole axis may greatly a...
متن کاملThe Chaotic or Non-chaotic Behavior of Global Geomagnetic Processes
Numerous linear studies of the geomagnetic indices have shown that the magnetospheric system is neither periodic nor quasiperiodic, and that only part of the AE variation can be explained as a direct linear response to the solar wind. This suggests the possibility that the magnetosphere is a non-linear system, and recent studies have been directed to determining whether the magnetospheric syste...
متن کاملAnalysis of global geomagnetic variability
The orthogonal field components from global INTERMAGNET magnetometer stations are studied via multifractal detrended fluctuation analysis to determine whether there are clear and consistent regional patterns in the behavior of the fluctuations. There are three distinct scaling regimes in the qth-order fluctuation function for each of the 24 stations studied covering Southwest North America, Nor...
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: Frontiers in Earth Science
سال: 2018
ISSN: 2296-6463
DOI: 10.3389/feart.2018.00017