Observations of airglow and geomagnetic pulsations at Paratunka and Stecolny

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   We have made observations of airglow images and geomagnetic pulsations at
   Paratunka (52.9N, 158.3E, MLAT=46.0N, since August 2007) and Stecolny
   (60.0N, 150.9E, MLAT=52.2N, since November 2008) near Magadan in
   Far-eastern Russia, using two all-sky cooled-CCD airglow imagers and two
   64Hz-sampling induction magnetometers. In this presentation we review our
   recent results obtained by these continuous observations. The airglow
   imagers observe gravity waves and ionospheric disturbances in the
   mesopause region and in the ionosphere at altitudes of 80-100 km and
   200-300 km, respectively. Climatology of gravity wave propagation
   direction has been made using the mesospheric airglow images at Paratunka.
   Nighttime medium-scale traveling ionospheric disturbances (MSTIDs) are
   often observed in the ionospheric 630-nm airglow images. Comparison with
   plasma velocities observed by the SuperDARN Hokkaido radar has been made
   to understand detailed plasma dynamics in the MSTIDs. Variation of
   polarization angle of Pc1 geomagnetic pulsations within a frequency band
   are reported from these two stations, suggesting spatial distributions of
   ionospheric Pc1 sources at subauroral latitudes. The Pc1 pulsations cause
   loss of relativistic electrons in the Earth's radiation belts, and thus,
   investigation of Pc1 pulsations merits attention for space weather
   research.