POLAR IONOSPHERIC DISTURBANCES AND SOLAR CORPUSCULAR EMISSIONS
Polar radio blackouts are classified into two characteristic types, one is the polar cap blackout and the other is the auroral zone blackout. It is shown that the polar cap blackout appears with some hours delay after a major solar radio outburst of type IV, and the blackout is confined within the geomagnetic latitude 60--65 deg . The estimated energies of particles causing this are of about 10 to 100 Mev. The auroral zone blackout then follows, being accompanied with geomagnetic storms and aurorae, and it may be caused by the so- called auroral particles of 1 Mev or less. The energy spectrum of solar particles associated with solar flares is revealed from the present result together with all information from various observations related to solar and terrestrial disturbances. It is concluded that solar particles have a conspicuous suprathermal nonMaxwellian tail extending from a few kev up to relativistic energy range, though the bulk of corpuscular clouds consists of rather low energy particles and hence likely to be in the Maxwellian distribution. Some discussions on the nature of solar corpuscular clouds and their effect upon the terrestrial ionosphere are also given. (auth)
- Research Organization:
- Radio Research Labs., Tokyo
- NSA Number:
- NSA-15-025376
- OSTI ID:
- 4017715
- Journal Information:
- Planetary Space Sci., Journal Name: Planetary Space Sci. Vol. Vol: 5
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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