Solar wind and geomagnetic activity

Details Solar wind and geomagnetic activity Solar wind and geomagnetic activity

Oct 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974ncimb..23..473f&link_type=abstract

Nuovo Cimento, Sezione B, vol. 23 B, Oct. 11, 1974, p. 473-488. Research supported by the Consiglio Nazionale delle Ricerche.

Astronomy and Astrophysics

Astronomy

Geomagnetism, Interplanetary Magnetic Fields, Magnetospheric Instability, Plasma Interactions, Satellite Observation, Solar Wind, Astronomical Models, Dynamic Pressure, Heos Satellites, Magnetic Disturbances, Plasma Dynamics

Scientific paper

Interplanetary plasma and magnetic-field parameters, measured by the ESRO satellite HEOS-1, have been correlated with the Dst, taken as an index of the overall geomagnetic activity. It is found that two different states exist for the interaction between the solar wind and the magnetosphere: they correspond to quiet periods (Dst positive) and to disturbed conditions (main phase of geomagnetic storms - i.e., Dst negative). In disturbed conditions the magnetosphere appears to be much more sensitive to variations of the solar-wind dynamical pressure than in periods of positive D sub st.

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