Physics of auroral phenomena : proceedings of the 36th Annual seminar, Apatity, 26 February – 01 March, 2013 / [ed. board: A. G. Yahnin, A. A. Mochalov]. - Апатиты : Издательство Кольского научного центра РАН, 2013. - 215 с. : ил., табл.

A.G. YahninandT.A. Yahnirn the wave observations mapped onto the northern ionosphere in Corrected Geomagnetic coordinates along with traces of two NOAA satellites traversed the conjugated region. Black dots on the THEMIS A trace indicate 30-minute intervals, and circles on the NOAA-18 and Metop-02 traces indicate minutes. Both NOAA satellites registered a wide region of proton precipitation at latitudes 67° to 71.5° CGLat shown in Fig. 1 by thick bars. 190 200 210 CGLong, deg Fig. 1 220 H" 230 6 0 65 70 75 Corrected Geomagnetic Latitude, deg F ig .2 1200 - i ь 800 ш < 400 o> 0 T3 CD ■oD О о w CO CM Etj, x‘3 М М М ! Г П I I I I I I! I I I I I I Г ' Г П Т П 80 -ц 75 -= 70 65 -3 60 24 -q 18 TTT e 2 • i t y 6 4 0 107 10s- J i l l ’ II I II I II II I II ITT IT "П II I I I I I I II 103- T T 80 60 - 40 - 20 0 25 27 29 31 2 4 6 8 10 12 14 16 18 20 22 Day of July - August 2005 Fig- 3 Data from the two satellites before and after 01-04 UT do not show any significant precipitating flux in this region. The conjunction of the precipitation region with the region of the wave activity suggests their close relationship. The trapped and precipitating proton fluxes for the two NOAA orbits are shown in Fig. 2. It is clear that the precipitation is inside the anizotropic zone and is well separated from isotropic fluxes at higher latitudes. The precipitation pattern shown in Fig. 2 has a wide latitudinal size and, therefore, differs from LPEP, which are narrow spikes o f precipitating flux with latitudinal dimension typically less than 1 °. 3. Occurrence of the dayside proton precipitation within the anisotropic zone A search through NOAA satellite particle data showed that such structures of proton precipitation (below we call them as WPEP - wide precipitation o f energetic protons) are rather common on the dayside. To illustrate this fact, let us consider a relatively prolonged interval of 25 July - 23 August 2005. This interval was characterized by the variable geomagnetic activity (see, Fig. 3a). Invariant latitude and MLT o f each of proton precipitation events observed during this interval are plotted in the Fig. 3b,с (actually, coordinates o f middle points o f precipitation events are plotted). 82