Solar Coronal Dynamics at Recent Total Eclipses
Jay Pasachoff



We have observed the total solar eclipses over the most recent solar-activity cycle with special concentration on dynamics. For example, we have measured velocities for a coronal mass ejection (CME) on the 2012 total eclipse, observed from our site in Australia and compared with observations from a Pacific-Ocean site. At the 2013 eclipse that we observed from Gabon, we measure motions of the two CMEs and the erupting prominence that were visible by comparing our observations with those from three other sites across Africa, including that of Shadia Habbal from Kenya. We compare our eclipse results with those from spacecraft, including Solar Dynamics Observatory, STEREO, Solar and Heliospheric Observatory, and SWAP on ESA's PROBA2. With those comparisons, we can trace CMEs from their origins on the solar disk through the region of the corona best visible at eclipses and into the outer corona. We have followed the overall coronal temperature with a series of visible-light slitless spectra over the entire solar cycle. We also discuss our observations of active disk regions with the Jansky Very Large Array during the 2012 annular eclipse. Finally, we discuss plans for observing the March 20, 2015, total solar eclipse in Svalbard and the total solar eclipse that will sweep across the Continental United States on August 21, 2017, as well as its appearance as a partial eclipse in Honolulu with 38% of the solar diameter covered by the moon at sunrise.

Our recent eclipse studies have been supported by the Solar Terrestrial Research program of the National Science Foundation and the Committee for Research and Exploration of the National Geographic Society. Our website for the Working Group on Solar Eclipses of the International Astronomical Union is at http://www.eclipses.info.