High resolution, multi-wavelength images from the Dutch Open Telescope were used to study the detailed mechanisms that might be involved in the multiple layer solar atmosphere observed in high cadence multi-wavelength observations. With the exceptional data observed for active region NOAA 10789 on 2005 July 13th, we study the changing pattern of the fibril using multi-wavelength tomography of the Hα line center and blue wing, Ca II H, and the G Band. It is believed that a long fibril that is rooted in the umbra, with longer apparent periodicity, may be due to morphological changes. To determine this, we conduct phase difference and coherency analysis between points along the fibril to understand how the wave propagates.

ABSTRACT
1. INTRODUCTION
2. DATA AND METHOD OF ANALYSIS
3. RESULTS AND ANALYSIS
4. CONCLUSIONS
REFERENCES

• Emanuel S. Mumpuni(Graduate Program in Astronomy, Faculty of Mathematics and Natural Sciences, Bandung Institute of Technology/National Institute of Aeronautics and Space)
• Dhani Herdiwijaya(Graduate Program in Astronomy, Faculty of Mathematics and Natural Sciences, Bandung Institute of Technology)
• Mitra Djamal(Graduate Program in Physics, Faculty of Mathematics and Natural Sciences, , Bandung Institute of Technology)
• Thomas Djamaluddin(National Institute of Aeronautics and Space)