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Polar Meeting Events

Figure 1a (JPEG) (PDF). Magnetic field on September 19, 2003 0400-1100 UT. Polar is slowly crossing the current sheet near apogee. Magnetic field strength reaches very low levels, less than 10 nT. After 0800 UT field increases rapidly in Bx while remaining constant and small in Y and Z directions. Suddenly it drops and Bz increases. Physically the tail at Polar has become very stretched and lobe-like. Then it suddenly dipolarizes.

Figure 1b (JPEG) (PDF). Blow up of magnetic field from 0750 to 0830 UT on 9/19/2003 showing region of stretching and collapse

Figure 1c (JPEG) (PDF). Blow up of magnetic field from 0807 to 0816 on 9/19/2003 showing region of stretching and collapse

Figure 2a (JPEG) (PDF). Magnetic field from 2300 on October 15, 2003 to 0500 UT on October 16, during a crossing of the current sheet. Dipolarization event occurs at 0030 UT while Polar is far from current sheet. Increase in Bx near current sheet crossing at 0250 UT may be mainly due to a flapping of the current sheet and not stretching.

Figure 2b (JPEG) (PDF). Blow up of the magnetic field from 0240 to 0330 UT on 10/16/2003

Figure 2c (JPEG) (PDF). Blow up of the magnetic field from 0255 to 0305 UT on 10/16/2003 showing waves that may be mirror mode

Figure 3a (JPEG) (PDF). Magnetic field on October 13, 2003 from 2000 to 2200 UT during a rapid traversal of the current sheet. Dipolarization occurs after current sheet crossing at 2135 UT

Figure 3b (JPEG) (PDF). Blow up of magnetic field from 2100 to 2135 UT on 10/13/2003 showing Bz structure in current sheet

Figure 3c (JPEG) (PDF). Blow up of magnetic field from 2112 to 2124 on 10/13/2003 showing Bz structure in current sheet

Last updated: February 18, 2005