Relation of cosmic-ray variations to interplanetary plasma observations for the event of 15 February, 1978
Abstract
A very rapid, almost symmetric, spike-like cosmic-ray depression occurred on 15 February, 1978, and was detected by the whole network of neutron monitors and underground meson telescopes. It is suggested that this rare cosmic-ray depression was related with the solar flares of 13 February, 1978 and was caused by one forward interplanetary shock wave, taking place in the leading edge of a fast solar wind stream, rather than a shock pair.
- Publication:
-
Astrophysics and Space Science
- Pub Date:
- November 1983
- DOI:
- 10.1007/BF00684608
- Bibcode:
- 1983Ap&SS..97...49G
- Keywords:
-
- Cosmic Rays;
- Interplanetary Medium;
- Solar Activity Effects;
- Space Plasmas;
- Helios 1;
- Helios 2;
- Interplanetary Magnetic Fields;
- Shock Waves;
- Solar Flares;
- Solar Wind Velocity;
- Type 4 Bursts;
- Space Radiation