Waves and Instabilities at Midlatitudes - The Earth's Ionosphere: Plasma Physics and Electrodynamics - page 291

Log 10 of N e (cm 2 3 ) Arecibo: Oct 2, 2002

6

500

5.5

450 5

4.5

400

4

350

3.5

300

250

200

8.7 8.8 8.9 9 9.1 9.2 9.3 9.4 9.5 9.6 9.7 9.8 9.9 10 10.1 10.2

Time (UT, LT 1 4)

Figure 6.14b Summary of Arecibo ISR data for the night of October 1-2, 2002. The
plasma went unstable just before 9 UT (near dawn). [After Nicolls and Kelley (2005).
Reproduced with permission of the American Geophysical Union.] See Color Plate 13.

March 31, 2001 19:30 UT LogTEC (TECu)

2

1.9

1.8

SED Plume

1.7

1.6

Enhanced TEC

1.5

1.4

1.3

1.2

Figure 6.14c Poleward extension of the anomaly zone and its capture of a plume by
antisunward flow into the polar cap. (Figure courtesy of John Foster.) See Color Plate 14.