Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Recovery phase of magnetic storms induced by different interplanetary
  drivers   Statistical analysis of Dst behaviour during recovery phase of magnetic
storms induced by different types of interplanetary drivers is made on the
basis of OMNI data in period 1976-2000. We study storms induced by ICMEs
(including magnetic clouds (MC) and Ejecta) and both types of compressed
regions: corotating interaction regions (CIR) and Sheaths. The shortest,
moderate and longest durations of recovery phase are observed in ICME-, CIR-,
and Sheath-induced storms, respectively. Recovery phases of strong ($Dst_{min}
< -100$ nT) magnetic storms are well approximated by hyperbolic functions
$Dst(t)= a/(1+t/\tau_h)$ with constant $\tau_h$ times for all types of drivers
while for moderate ($-100 < Dst_{min} < -50$ nT) storms $Dst$ profile can not
be approximated by hyperbolic function with constant $\tau_h$ because
hyperbolic time $\tau_h$ increases with increasing time of recovery phase.
Relation between duration and value $Dst_{min}$ for storms induced by ICME and
Sheath has 2 parts: $Dst_{min}$ and duration correlate at small durations while
they anticorrelate at large durations.

23
The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
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The categories of this paper are: eess
0
The categories of this paper are: hep-ph
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The categories of this paper are: adap-org