The East-West structure of mid-latitude geomagnetic pulsations in the 8-25 mHz band
Abstract
We report results from 6 days' continuous recording of pulsation activity on a chain of magnetometers aligned East-West at 56.5°N geomagnetic latitude. We find phase differences between stations are relatively small. Signal propagation sense and horizontal polarisation correlate as low frequency inhomogeneous plasma theory predicts. There is no evidence of the Kelvin-Helmholtz instability being the major source. The most highly coherent signals often occur near midnight. We suggest the nightside may be the source region for a significant amount of dayside pulsation activity.
- Publication:
-
Planetary and Space Science
- Pub Date:
- May 1979
- DOI:
- 10.1016/0032-0633(79)90159-4
- Bibcode:
- 1979P&SS...27..617M
- Keywords:
-
- Geomagnetic Pulsations;
- Midlatitude Atmosphere;
- Very Low Frequencies;
- Diurnal Variations;
- Nocturnal Variations;
- Polarization Characteristics;
- Signal Analysis;
- Wave Propagation;
- Geophysics