Physics of auroral phenomena : proceedings of the 33rd Annual seminar, Apatity, 02 - 05 March, 2010 / [ed.: A.G. Yahnin, A. A. Mochalov]. - Апатиты : Издательство Кольского научного центра РАН, 2011. - 206 с. : ил.

N.G. Sergeeva, O.F. Ogloblina GOES-12. Herewith, the fluxes of electrons on August 8 were increased on one order during several days, including on August 11. Weak variations o f the interplanetary magnetic field were observed also, particularly in first half of day on August 7. ?A ooes - i : - 4 ,e n*T—T II .\aprfXKi ooes-u ... .r^.„ >r.,....... ViiTs?4.» П IJ I* 21 irr, ton» Fig. 2. The variations of the solar X-ray emission fluxes on August 7 and 11, 2006 by o f the GOES-12 satellite. ( T - time of the earthquakes beginning). The riometric absorption at the frequency 29.9 MHz at stations Ivalo (68.55° N, 27.28° E) and Sodankyla (67.37° N, 26.63° E) on August 7, 8 in the first half of the day were increased till 2.5 dB and 4.5 dB, accordingly. 7 August 2006 11 August 2006 rw 29.fMHz SOD 5L4MHz 2.5 dl /±v m. 29J MHz SOD 31.4 MHz SOD M JM Hz .-"S. ---- , L H ■T '■ ■ ■ 1dB /div Hour (UT) 6 9 12 15 18 21 Time (UT), hour Fig. 3. The variations of riometer absorption at the frequency 29.9 MHz on August 7 and 11, 2006 at stations Ivalo (IVA) and Sodankyla (SOD). (T -tim e of the earthquakes beginning). The geomagnetic field (Kp =10.3) on August 11, 2006 can be considered as quiet. The solar activity reach maximum value, when three flares of С-class appeared. Then solar activity began to decrease. The interplanetary magnetic field was practically quiet. Riometer absorption at the frequency 29.9 MHz at stations Ivalo and Sodankyla on August 11 was weak, slowly changing and does not exceed 0.5 dB. The strong earthquake with the magnitude of 6.7 on the Richter scale took place on 7.08.2006 at 22:18:55 UT northward from island Vanuatu, in the Pacific Ocean (-15.80 ° S, 167.79 ° E) on the depth of 150 km under very disturbed geomagnetic field (Kp=32.3) and at weak solar flash o f A-class. Two strong earthquakes have occurred on 11.08.2006. The first earthquake with the magnitude of 6.1 on the Richter scale took place at 14:30:40 UT on 150 km to south-west from Tokyo (18.54 °N, -101.05 °E). The epicenter of the earthquake was situated on the depth of 56 km under bottom o f the Pacific Ocean. The second strong earthquake with the magnitude of 6.2 on the Richter scale took place at 20:54:14 UT in region island Sumatra (2.40 °N, 96.35 ° E) on the depth of 22 km. The experimental data o f partial-reflected signal were obtained in the Kola Peninsula at the observatory Tumanny (69.0°N, 35.7° E). In fig.4 daily spectra of the ordinary component amplitude o f partial- reflected signal on August 07 and 11 at height o f 101 km at the observatory Tumanny are shown. Frequency, Hz Frequency, Hz Fig. 4. Daily spectra of ordinary component amplitude of partial-reflected signal on August 7 and 11 at Tumanny. On day o f the earthquake on August 7 in spectrum o f the ordinary component amplitude o f partial-reflected signal, together with tidal atmospheric waves with the period of 18 hours, also internal gravity waves with the periods of 2- 4 hours were observed. At day o f the earthquake on August 11 in main maximum o f the spectrum o f the ordinary component amplitude of partial-reflected signal along with tidal atmospheric wave with periods of 18, 10 hours and internal gravity waves with periods of 3-5 hours were observed. On 11.08.2006 the spectrum o f ordinary component 148