1. Periodic Structures in Filaments Dr. Alexei A. Pevtsov

2. ISOON observations

3. Periodic Structures in Filaments Nakagawa & Malville, 1969 Length, 10 3 km -instability on the interface between the filament and supporting field -supergranular flows may have some influence (but unlikely) Typical supergranular cell

4. January 2003 16-Jan-2003 15 : 46 UT 17-Jan-2003 15 : 16 UT 17-Jan-2003 23 : 01 UT ISOON images

5. 23-Jan-2003 15 : 22 UT 22-Jan-2003 22 : 55 UT 21-Jan-2003 23 : 04 UT ISOON images

6. 24-Dec-2002 16-Feb-2003

7. Filament and Supergranuls