DR. RAMESH CHANDRA

Here, we present and discuss the surges and jets activity from NOAA AR 10484 and associated flare on 23 and 25 October, 2003. The observations was taken from the ARIES, Nainital, and various space borne satellites viz. SOHO, TRACE, RHESSI etc. On 23 October, 2003 the M2.4 class flare was initiated by the ejection of jet in the east direction. The flare was very impulsive and eruptive in nature associated with the Coronal mass ejection (CME). We observe a RHESSI X-ray compact source at the flare location. RHESSI 50–100 keV sources are co-aligned with the TRACE bright kernels and indicate the footprints of reconnected loops. A local linear force-free model of AR 10484 indicates that the AR magnetic field structure consists of large-scale and very extended loops and open field on the East of the active region. Another recurrent surges was observe on 25 October, 2003 from the same active region. Several bright structures visible in Halpha and UV corresponding to subflares are also observed at the base of each surge. Type III bursts are triggered and RHESSI X-ray sources are evident with surge activity. Radio observations of type III bursts indicate that they are coincident with the surges, suggesting that magnetic reconnection is the driver mechanism. The magnetic energy released by reconnection is transformed into plasma heating and provides the kinetic energy for the ejections.