Dynamics of the Earth’s radiation belts during the magnetic storm of November 6th, 2001

详细信息    查看全文

• 作者：S.N. Kuznetsov ; B.Yu. Yushkov ; K. Kudela ; I.N. Myagkova ; L.I. Starostin and Yu.I. Denisov
• 关键词：Earth’ ; s radiation belts ; Radiation belt dynamics ; Magnetic storm of 6 November 2001
• 刊名：Advances in Space Research
• 出版年：2005
• 出版时间：2005
• 年：2005
• 卷：36
• 期：10
• 页码：1997-2002
• 全文大小：365 K

文摘

The magnetic storm on November 6th with <i>Dsti> = −257 nT at minimum was produced by the coronal mass ejection during the solar flare at 16.30 UT on November 4th, 2001. Data obtained onboard the CORONAS-F satellite (the polar orbit with altitude about 500 km) are used to study radiation belt dynamics during this magnetic storm and after it. Measurements of November 4th and 5th correspond to the stable state of the radiation belt. Data obtained shortly after minimum of the <i>Dsti>-variation show a drastic decrease of electron fluxes in a wide energy range in the outer belt as well as a shift of this belt maximum from <i>Li> = 4 to <i>Li> 2.9 and a shift of the slot to <i>Li> 2. Particle fluxes in the inner radiation belt were practically constant. After 24 h the electron fluxes with <i>Ei>_e 0.3–0.6 MeV increased, but electron fluxes with <i>Ei>_e > 1.5 MeV were significantly lower than those of before the storm. The acceleration of electrons upto relativistic energies took place during the recovery phase of the magnetic storm at the inner boundary of the outer belt and ended by November 12th whereas formation of the belt maximum for electrons with energies <i>Ei>_e 0.3–0.6 MeV was connected with electron diffusion from the outer boundary. Besides, an increase of the electron fluxes of all energies at the outer boundary of the inner radiation belt was observed.