M. J. Keskinen

TL;DR: The effects of the great magnetic storm of July 15, 2000 on the equatorial ionosphere have been studied by ground-based and satellite in-situ measurements as mentioned in this paper, showing that the IMF Bz turned southward and presumably caused penetration of E-fields to low latitudes, which initiated the onset of 250 MHz and L-band scintillations at Ascension Island (15°W).

TL;DR: In this paper, the first numerical simulations of the nonlinear evolution of the electrostatic Kelvin-Helmholtz (K-H) instability with ionospheric Perderson conductivity coupling are presented.

TL;DR: In this article, a study of the distribution and dynamics of mesoscale (tens of kilometers to tens of meters) electron density irregularities in the dayside auroral region was performed at Ny Alesund, Svalbard, by measuring the effects of these irregularities on the amplitude scintillation of 250-MHz transmissions from a quasi-stationary polar satellite as well as the amplitude and phase scintillations of 1.6-GHz signals from Global Positioning System (GPS) satellites.

TL;DR: In this paper, the authors present the first study of the three-dimensional nonlinear evolution of an equatorial spread-F bubble, using numerical simulation techniques, and find that finite parallel conductivity effects slow down both the linear and nonlinear bubble evolution compared to the two-dimensional evolution.

TL;DR: In this paper, the evolution of ionospheric plasma density structures at middle and equatorial latitudes during the intense magnetic storms of October 29-31-2003, July 15-2000, and March 30-31, 2001 is investigated.