Helioseismic Studies of a Sunspot using HMI Data

We study the mode parameters and sub-surface properties of the sunspot in NOAA active region 10093 during its disk passage between August 6-14, 2010. This is one of the major active regions recorded so far during the cycle 24 and continuous observations are available from the Helioseismic and Magnetic Imager (HMI). We will present the results using the HMI data processed through the HMI ring-diagram pipeline and compare those obtained with the GONG pipeline. We will also present results by analyzing the GONG observations through GONG pipeline.