@article{ZolotovProkhorovNamgaladzeetal.2011,
  author    = {Zolotov, O. V. and Prokhorov, Boris E. and Namgaladze, Alexander A. and Martynenko, O. V.},
  title     = {Variations in the total electron content of the ionosphere during preparation of earthquakes},
  series = {Russian journal of physical chemistry : B, Focus on physics},
  volume    = {5},
  journal   = {Russian journal of physical chemistry : B, Focus on physics},
  number    = {3},
  publisher = {Pleiades Publ.},
  address   = {New York},
  issn      = {1990-7931},
  doi       = {10.1134/S1990793111030146},
  pages     = {435 -- 438},
  year      = {2011},
  abstract  = {The morphological features in the deviations of the total electron content (TEC) of the ionosphere from the background undisturbed state as possible precursors of the earthquake of January 12, 2010 (21:53 UT (16:53 LT), 18.46A degrees N, 72.5A degrees W, 7.0 M) in Haiti are analyzed. To identify these features, global and regional differential TEC maps based on global 2-h TEC maps provided by NASA in the IONEX format were plotted. For the considered earthquake, long-lived disturbances, presumably of seismic origin, were localized in the near-epicenter area and were accompanied by similar effects in the magnetoconjugate region. Both decreases and increases in the local TEC over the period from 22 UT of January 10 to 08 UT of January 12, 2010 were observed. The horizontal dimensions of the anomalies were similar to 40A degrees in longitude and similar to 20A degrees in latitude, with the magnitude of TEC disturbances reaching similar to 40\% relative to the background near the epicenter and more than 50\% in the magnetoconjugate area. No significant geomagnetic disturbances within January 1-12, 2010 were observed, i.e., the detected TEC anomalies were manifestations of interplay between processes in the lithosphere-atmosphere-ionosphere system.},
  language  = {en}
}
@article{FoersterNamgaladzeDoroninaetal.2011,
  author    = {F{\"o}rster, M. and Namgaladze, Alexander A. and Doronina, E. N. and Prokhorov, Boris E.},
  title     = {High-latitude thermospheric winds: Satellite data and model calculations},
  series = {Russian journal of physical chemistry : B, Focus on physics},
  volume    = {5},
  journal   = {Russian journal of physical chemistry : B, Focus on physics},
  number    = {3},
  publisher = {Pleiades Publ.},
  address   = {New York},
  issn      = {1990-7931},
  doi       = {10.1134/S1990793111030043},
  pages     = {439 -- 446},
  year      = {2011},
  abstract  = {The thermospheric crosswind velocities at an altitude of 400 km measured by an accelerometer on board of the CHAMP satellite are compared with the results of model calculations performed using the Upper Atmosphere Model (UAM). The results of measurements averaged over the year in 2003 reveal a two-vortex structure of high-latitude winds corresponding to magnetospheric-ionospheric convection of ions in the F2 ionosphere region. A similar picture with similar speed values was obtained in model calculations. A comparison of the crosswind speed obtained in individual measurements on October 28, 2003 with the corresponding model values revealed close agreement between them in some flights and differences in others. Taking into account the dependence of convection electric field on the B (y) component of interplanetary magnetic field sometimes improved agreement between thermospheric crosswind speeds obtained in model calculations and measured using the satellite.},
  language  = {en}
}
@article{NamgaladzeZolotovProkhorov2013,
  author    = {Namgaladze, Alexander A. and Zolotov, O. V. and Prokhorov, Boris E.},
  title     = {Numerical simulation of the variations in the total electron content of the ionosphere observed before the Haiti earthquake of January 12, 2010},
  series = {Geomagnetism and aeronomy},
  volume    = {53},
  journal   = {Geomagnetism and aeronomy},
  number    = {4},
  publisher = {Pleiades Publ.},
  address   = {New York},
  issn      = {0016-7932},
  doi       = {10.1134/S0016793213030122},
  pages     = {522 -- 528},
  year      = {2013},
  abstract  = {We present the results of a study of the abnormal variations in the total electron content (TEC) of the ionosphere observed before the earthquake of January 12, 2010, in Haiti. Global and regional maps of TEC relative (\%) deviations from the quite background state are built for January 9-12, 2010. Using the UAM (Upper Atmosphere Model) global numerical model of the upper atmosphere of the Earth, the variations in the electric potential in the ionosphere and TEC are calculated using external seismic current above faults between the Earth and the ionosphere as a lower boundary condition. The numerical simulation results are compared with observations. It is shown that the simulated variations in the TEC at a specified current density of about 1 x 10(-8) A/m(2) on an area of 200 km (latitude) x 4000 km (longitude) above the focus represent all main features of the observations: prevalence of increased TEC values (positive disturbances), neighboring negative disturbances of lower magnitudes, localization, magnetic conjugacy of high-intensity effects in the Southern Hemisphere, and disappearance of disturbances around midday. Methodological recommendations are given to reveal variations in the TEC related to the preparation of seismic events.},
  language  = {en}
}