Characterization of the Complex Ejecta Measured In Situ on 19 – 22 March 2001 by Six Different Methods

González, Arian Ojeda; Klausner, Virginia; Mendes, Odim; Domingues, Margarete Oliveira; Prestes, A.

doi:10.1007/978-94-024-1570-4_15

Cited by 1 publication

(2 citation statements)

References 70 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, not all intense storms are associated with the intense nature of B z [3,10]. That is, there are intense storms that are likely caused by moderate southward B z , (−10 nT < B z ≤ −5 nT) whose complex solar wind and interplanetary interplay may be different from other storms [44,45]. Kumar et al [35] observed that the magnitude and duration of the southward B z are fundamental in the occurrence and development of geomagnetic storms.…”

Section: Yearly Analysis Of Eventsmentioning

confidence: 99%

See 1 more Smart Citation

A Study of the Relationship Between Southward Bz > -10 nT and Storm Time Disturbance Index During Solar Cycle 23

David

Adekoya

Michael

et al. 2022

J. Nig. Soc. Phys. Sci.

View full text Add to dashboard Cite

Magnetic reconnection can be used for studying the geoeffective processes in the coupled Sun–Solar wind – Magnetosphere dynamics leading to geomagnetic disturbance. In this study, 1-hour resolution solar wind plasma parameters from OMNIweb were used to investigate the relationship between moderate southward interplanetary magnetic field, IMF-Bz (i.e., Bz > -10 nT) and geomagnetic storm time disturbance, Dst , during the ascending, maximum and descending phases of solar cycle 23. Occurrences of different classes of geomagnetic storms during moderate southward Bz are reported. The occurrence of weak and moderate geomagnetic storms is more predominant during maximum solar activity than intense and super intense storms. It was found that 10.11 % (181) of all the classes of the storm were intense, and 0.17 % (3) were super intense storms. Furthermore, it was found that 4 (2.2 %) out of the 181 intense storms were caused by southward Bz > -10 nT which were associated with the complex structure due to the high-speed solar wind stream and corotating interacting region. In such a complex structure and Bz > -10 nT, we observed that an intense geomagnetic storm rarely occurs and if it does, would be predominant around solar maximum. It was found that long-duration (\Delta t > 6 hrs) of southward Bz (i.e., -10 nT < Bz <= -3.6 nT ) can also lead to an intense geomagnetic storm during the solar maximum and descending phase (moderate solar activity) of a solar cycle. The complex structure of intense geomagnetic storms associated with the Bz > -10 nT is rare and possesses a special configuration of magnetic field and solar wind parameters structures which are CIR manifestations.

show abstract

Section: Yearly Analysis Of Eventsmentioning

confidence: 99%

“…Choi et al [7] referred to such an event with a duration ≥ 3 hrs as long-weak B z and has characteristics of HSSs/CIRs driven intense storms. The event properties emanated from coronal holes and are associated with stream interaction regions [5] and are identified as complex ejecta [3,45].…”

Section: Yearly Analysis Of Eventsmentioning

confidence: 99%