Results 41 to 50 of about 34,661 (210)

Long-Term Changes and Trends in the F2 Layer Critical Frequency over Alma-Ata (Kazakhstan)

Atmosphere
The long-term variability and trends in the F2 layer critical frequency variations over Alma-Ata [43.25 N, 77.92 E] for the period 07.1957–04.2018 are studied using near-midday, near-midnight, and hourly median foF2 values.
Galina Gordiyenko, Artur Yakovets, Yurii Litvinov, Murat Zhiganbayev   +3 more
doaj   +1 more source

Operative center of the geophysical prognosis in Izmiran [PDF]

Annales Geophysicae, 2005
IZMIRAN was founded about 65 years ago with one of the goals of carrying out geomagnetic prognoses. More or less, this activity has been developed during its entire history, but about 6 years ago this aim became sufficiently feasible due to the ...
A. V. Belov, S. P. Gaidash, K. D. Kanonidi, K. K. Kanonidi, V. D. Kuznetsov, E. A. Eroshenko   +5 more
doaj   +1 more source

Artificial periodic irregularities in the auroral ionosphere [PDF]

, 1996
International audienceArtificial periodic irregularities (API) are produced in the ionospheric plasma by a powerful standing electromagnetic wave reflected off the F region.
N. P. Goncharov, Pollari, P., Goncharov, N.P., Matveinen, H., E. Turunen, H. Matveinen, P. Pollari, Rietveld, M., M. T. Rietveld, Turunen, E., Goncharov, N. P., Goncharov, N., Rietveld, M.T.   +12 more
core   +1 more source

Advancements in Remote Sensing for Monitoring and Risk Assessment of Glacial Lake Outburst Floods

Geosciences
Glacial Lake Outburst Floods (GLOFs) have emerged as a critical threat to high-mountain communities and ecosystems, driven by accelerated glacier retreat and lake expansion under climate change.
Serik Nurakynov, Nurmakhambet Sydyk, Zhaksybek Baygurin, Larissa Balakay   +3 more
doaj   +1 more source

Ionosphere Influenced From Lower-Lying Atmospheric Regions

Frontiers in Astronomy and Space Sciences, 2021
The ionosphere represents part of the upper atmosphere. Its variability is observed on a wide-scale temporal range from minutes, or even shorter, up to scales of the solar cycle and secular variations of solar energy input.
Petra Koucká Knížová, Jan Laštovička, Daniel Kouba, Zbyšek Mošna, Katerina Podolská, Katerina Potužníková, Tereza Šindelářová, Jaroslav Chum, Jan Rusz   +8 more
doaj   +1 more source

The STM32 microcontroller based pulse intensity registration system for the neutron monitor

EPJ Web of Conferences, 2017
We present the outlines of a new microcontroller based data acquisition system which is aimed for reliable operation in a typical cosmic ray particle registration experiment.
Shepetov Alexander, Chubenko Alexander, Kryakunova Olga, Nikolayevsky Nikolay, Salikhov Nazyf, Yanke Victor   +5 more
doaj   +2 more sources

D-index: an energy-based diagnostic for detecting dynamical transitions in nonstationary time series

Journal of Physics Communications
Detecting and localizing transient regime transitions in nonlinear and nonstationary time series remains a major challenge in monitoring and forecasting the behaviour of complex natural and engineered systems.
Vitaliy Kapytin, Vyacheslav Somsikov, Alexey Andreyev, Yekaterina Chsherbulova   +3 more
doaj   +1 more source

He+ dominance in the plasmasphere during geomagnetically disturbed periods: 1. Observational results [PDF]

, 2002
Observations made by the DMSP 1710 satellite during the recovery phase from geomagnetic disturbances in June 1991 show regions of He+ dominance around 830 km altitude at 09:00 MLT.
Wilford, C. R., Bailey, G.J., G. J. Bailey, Denton, M.H., Bailey, G. J., Wilford, C.R., Rodger, A. S., Rodger, A.S., Venkatraman, S., Denton, M. H., C. R. Wilford, A. S. Rodger, S. Venkatraman, M. H. Denton   +13 more
core   +1 more source

Development of a Long Short-Term Memory (LSTM)-Based Statistical Model for Earthquake Forecasting in Central Asia

IEEE Access
Earthquake forecasting using traditional methods remains a complex task due to the inherent nonlinearity and stochastic nature of seismic activity. Therefore, this study examines the application of deep learning methods, particularly a hybrid model ...
Marat Nurtas, Aizhan Altaibek, Aizhan Ydyrys, Andrey Vilayev, Takhmina Nessipbay   +4 more
doaj   +1 more source

Radio tomographic imaging of the northern high-latitude ionosphere on a wide geographic scale [PDF]

, 2005
Several chains of receivers, measuring total electron content (TEC) during passes of satellites in the U.S. Navy Ionospheric Measuring System (NIMS), are operated at northern high latitudes by members of the International Ionospheric Tomography Community
Bailey, G.J., Jakowski, N., Fremouw, E., Bust, G., Denton, M.H., Kersley, L., Pryse, Elery, Jakowski, Norbert, Pryse, S.E., Secan, J., Kersley, Len   +10 more
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