
doi: 10.1038/210617b0
A NUMBER of authors1–3 have shown that near the magnetic equator ionospheric drifts occur, in both the E and F regions, which are mainly westwards by day and mainly eastwards by night. Results for F region drifts at Ibadan have been given by Skinner, Lyon and Wright1 for the International Geophysical Year (IGY) (1957–58). These show that for quiet days during equinox periods at sunspot maximum, the median velocity of drift reached a value of about 100 m/sec eastwards at midnight and a value of about 76 m/sec westwards at noon. The changes in direction occurred rather rapidly at about 0700 in the morning and at about 2000 in the evening.
| selected citations These citations are derived from selected sources. This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 9 | |
| popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Average | |
| influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Top 10% | |
| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Top 10% |
