Relationship between the PC and AL indices during repetitive bay-like magnetic disturbances in the auroral zone

Трошичев, О. А.; Janzhura, Alexander

doi:10.1016/j.jastp.2009.05.017

Cited by 40 publications

(37 citation statements)

References 26 publications

(34 reference statements)

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“…Thus, the analyses Janzhura, 2009) revealed that the PC index growth is a precursor of substorms development irrespective of a substorm type (isolated or sawtooth) and intensity. The growth phase duration is determined by the PC growth rate: the higher is the rate, the shorter is the growth phase duration.…”

Section: Relation Of the Pc Index To Magnetospheric Substormsmentioning

confidence: 92%

“…Usage of a proper QDC, as a level of reference for δF values, ensures invariance of the parameters , and  determining relationship between δF and E KL irrespective of solar activity (Troshichev et al, 2011a). As an evidence, Figure 2 shows distribution of , and  parameter derived for the Vostok station for epochs of solar maximum (Troshichev et al 2006) and solar minimum (Troshichev et al, 2011a), and for entire cycle of solar activity , Troshichev & Janzhura, 2009. One can see that patterns for , and parameters derived independently for different epochs are totally consistent (if make allowance for some difference in their scales).…”

Section: Physical Backgrounds and Methods For The Pc Derivationmentioning

confidence: 98%

“…Relationship between the PC index and progress of the strongest "sawtooth" substorms, whose intensity periodically increases and decreases, was analyzed by Troshichev & Janzhura (2009). The sawtooth events, developing under influence of a high-speed solar wind with strong fluctuating or a steady southward IMF, are distinguished from usual substorms by a larger local time extent (Lui et al, 2004;Henderson et al, 2006a,b;Clauer et al, 2006).…”

Section: Relation Of the Pc Index To Magnetospheric Substormsmentioning

confidence: 99%

“…6. Relationship between average PC and AL indices for weak magnetic bays (first panel), isolated short and extended substorms (second and third panels), and for sawtooth substorms (forth panel) (Troshichev and Janzhura, 2009). …”

Section: Relation Of the Pc Index To Magnetospheric Substormsmentioning

confidence: 99%

“…The mean duration of the growth phase is about 1 hour for isolated substorms and about 20-30 minutes for sawtooth substorms. As shown in (Troshichev and Janzhura, 2009) the PC growth phase is determined by the related E KL function growth. In case of sawtooth substorms both E KL and PC quantities stay at a high level after the substorm onset as well.…”

Section: Relation Of the Pc Index To Magnetospheric Substormsmentioning

confidence: 99%

See 4 more Smart Citations

Ground-Based Monitoring of the Solar Wind Geoefficiency

Трошичев¹

2012

Exploring the Solar Wind

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Section: Relation Of the Pc Index To Magnetospheric Substormsmentioning

confidence: 92%

Section: Physical Backgrounds and Methods For The Pc Derivationmentioning

confidence: 98%

Section: Relation Of the Pc Index To Magnetospheric Substormsmentioning

confidence: 99%

Section: Relation Of the Pc Index To Magnetospheric Substormsmentioning

confidence: 99%

Section: Relation Of the Pc Index To Magnetospheric Substormsmentioning

confidence: 99%

See 3 more Smart Citations

Ground-Based Monitoring of the Solar Wind Geoefficiency

Трошичев¹

2012

Exploring the Solar Wind

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PC index as a proxy of the solar wind energy that entered into the magnetosphere: Development of magnetic substorms

et al. 2014

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The Polar Cap (PC) index has been approved by the International Association of Geomagnetism and Aeronomy (IAGA XXII Assembly, Merida, Меxico, 2013) as a new index of magnetic activity. The PC index can be considered to be a proxy of the solar wind energy that enters the magnetosphere. This distinguishes PC from AL and Dst indices that are more related to the dissipation of energy through auroral currents or storage of energy in the ring current during magnetic substorms or storms. The association of the PC index with the direct coupling of the solar wind energy into the magnetosphere is based upon analysis of the relationship of PC with parameters in the solar wind, on the one hand, and correlation between the time series of PC and the AL index (substorm development), on the other hand. This paper (the first of a series) provides the results of statistical investigations that demonstrate a strong correlation between the behavior of PC and the development of magnetic substorms. Substorms are classified as isolated and expanded. We found that (1) substorms are preceded by growth in the РС index, (2) sudden substorm expansion onsets are related to "leap" or "reverse" signatures in the PC index which are indicative of a sharp increase in the PC growth rate, (3) substorms start to develop when PC exceeds a threshold level 1.5 ± 0.5 mV/m irrespective of the length of the substorm growth phase, and (4) there is a linear relation between the intensity of substorms and PC for all substorm events.

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The equatorial electrojet during geomagnetic storms and substorms

Yamazaki

Kosch

2015

JGR Space Physics

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The climatology of the equatorial electrojet during periods of enhanced geomagnetic activity is examined using long‐term records of ground‐based magnetometers in the Indian and Peruvian regions. Equatorial electrojet perturbations due to geomagnetic storms and substorms are evaluated using the disturbance storm time (Dst) index and auroral electrojet (AE) index, respectively. The response of the equatorial electrojet to rapid changes in the AE index indicates effects of both prompt penetration electric field and disturbance dynamo electric field, consistent with previous studies based on F region equatorial vertical plasma drift measurements at Jicamarca. The average response of the equatorial electrojet to geomagnetic storms (Dst<−50 nT) reveals persistent disturbances during the recovery phase, which can last for approximately 24 h after the Dst index reaches its minimum value. This “after‐storm” effect is found to depend on the magnitude of the storm, solar EUV activity, season, and longitude.

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Relationship between the PC and AL indices during repetitive bay-like magnetic disturbances in the auroral zone

Cited by 40 publications

References 26 publications

Ground-Based Monitoring of the Solar Wind Geoefficiency

Ground-Based Monitoring of the Solar Wind Geoefficiency

PC index as a proxy of the solar wind energy that entered into the magnetosphere: Development of magnetic substorms

The equatorial electrojet during geomagnetic storms and substorms

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