An atlas of coronal hole boundary positions May 28 to November 21, 1973

Nolte, J. T.; Krieger, A. S.; Timothy, A. F.; Vaiana, G. S.; Zombeck, Martin V.

doi:10.1007/bf00149858

Cited by 51 publications

(34 citation statements)

References 4 publications

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“…The geomagnetic activity that was discussed in the previous section occurred on Bartels Rotation 1918(BR 1918, and it was associated with a coronal hole that is designated CH2 (see Figure 3a from results in Nolte et al (1976). On the next rotation, BR 1919, there was again a moderate storm associated with CH2.…”

Section: I1 Discussion Of Other Recurrent Stormsmentioning

confidence: 82%

“…Thus, the geomagnetic activity in a moderate recurrent storm lasting coronal hole near the solar equator (Nolte et al, 1976, Sheeley et Al., 1976, which is shown in Figure 3a. It is generally agreed that such streams are accelerated within 25 solar radii of the Sun and move through the interplanetary medium with little change in speed.…”

Section: Effect Of the Higher Frequency Variations In B Z Followingmentioning

confidence: 99%

“…Observations by Skylab in 1973 revealed the existence of regions called coronal holes in which the density is low and the magnetic field lines diverge. These are found to be correlated with solar wind streams (e,g., see Nolte et al, 1976, Sheeley et al, 1976, Neupert and Pizzo, 1974. The prevailing view at present is that M-regions are in fact coronal holes, but this should be viewed as a preliminary result.…”

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confidence: 92%

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The causes of recurrent geomagnetic storms

Burlaga

Lepping

1977

Planetary and Space Science

101

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Section: I1 Discussion Of Other Recurrent Stormsmentioning

confidence: 82%

Section: Effect Of the Higher Frequency Variations In B Z Followingmentioning

confidence: 99%

mentioning

confidence: 92%

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The causes of recurrent geomagnetic storms

Burlaga

Lepping

1977

Planetary and Space Science

101

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“…Here we have replotted the boundaries of all coronal holes seen in X-rays between May and November, 1973, as reported by Nolte et al (1976b), in a rectangular synoptic format, one solar rotation per panel. We have also indicated three kinds of solar activity on this figure.…”

Section: Coronal Holes and Solar Activitymentioning

confidence: 99%

“…Note that this hole, designated CH1 by Nolte et al (1976b), also appears at the right end of the panels for rotations 1602-1608 because we have extended each plot by 30 ~ at each end to show the continuity from one rotation to the next.…”

Section: Coronal Holes and Solar Activitymentioning

confidence: 99%

The relationship between solar activity and coronal hole evolution

Nolte¹,

Davis²,

Gerassimenko³

et al. 1978

Sol Phys

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We examine the relationship between coronal hole evolution and solar active regions during the Skylab period. We find a tendency for holes to grow or remain stable when the activity nearby, seen as calcium plages and bright regions in X-rays, is predominantly large, long-lived regions. This is consistent with results of previous studies, using somewhat different methods. We also find that there is a significantly higher number of small, short-lived active regions, as indicated by X-ray bright points, in the vicinity of decaying holes than there is near other holes. We interpret this to mean that holes disappear at least in part because they become filled with many small scale, magnetically closed, X-ray emitting features. This interpretation, together with the previously reported observation that the number of X-ray bright points was much larger near solar minimum than it was during the Skylab period, provides a possible explanation for the disappearance of the large, near-equatorial coronal holes at the time of solar minimum.

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