DETECTING SOLAR WIND ACTIVITY USING MAGNETOMETER AT KOTOTABANG OBSERVATORY

DETECTING SOLAR WIND ACTIVITY USING MAGNETOMETER AT KOTOTABANG OBSERVATORY

ABSTRACT During the year 2014 specialize on February 2014, magnetometer in Kototabang Observatory observed several geomagnetic storms which indicate the solar wind activity. From the magnetometer data we found that there are some large-scale storm was in  19^th February 2014, 20^th February 2014, 21^st February 2014, 22^nd February 2014, 23^rd February 2014, 27^th February 2014 and 28^th February 2014. This solar wind activities are triggered by the solar activity, such as flares, coronal mass ejection, and coronal holes. Such solar activities will affect the characteristics of the daily variation of magnetic field component, since the CMEs and flares will increase the intensity and the speed of solar wind and the radiation of electromagnetic waves. Data processing is done by converting raw data into ASCII format and then corrects noise by IAGA format  data to generate data variation daily then compared with the data Dst index and obtain a second index data K ( local geomagnet disturbance) to detect when a large magnetic storms during February 2014. By using  Field Research  with qualitative approach. From the analysis we found eight times middle storm was in February 2014, and major storms over minus 100 nT in the same month. Also  data visible local geomagnetic reaction  is proportional to the current value of the index Dst impairment. High intensity occurred in February 2014 mainly on 19 with intensity values above minus 100 nT

Keywords: Indeks K, Geomagnet storm, Indeks Dst