%T DESIGN AND DEVELOPMENT OF WAP SERVICE ON GEOMAGNETIC ACTIVITY %D 2009 %J Seminar Nasional Penelitian, Pendidikan, dan Penerapan MIPA 2009 %L UNY12253 %K geomagnetic activity, k index, WAP service, WML, PHP, MySQL %A Anwar Bachtiar %X Services based on wireless application protocol (WAP) have increased significantly during the last several years. This kind of service provides flexibility to users in browsing information via a mobile phone. LAPAN has magnetometers installed at several stations (Biak, Tanjungsari, Pontianak, Kototabang, Manado, Parepare and Kupang) that can be used to derive local geomagnetic activity index, namely k index. In order to encourage the use of the index by public, we have recently developed a service based on Short Message Service (SMS). We expand the system so that the users are able to browse or query k index of any station and date directly from a mobile phone. In developing the system, we have made use of a WAP browser to connect to Apache web server and have used PHP to generate WML scripts to provide the user a capability in querying k index to MySQL database via a mobile phone. In this paper, we report the development of WAP service on geomagnetic activity and provide some examples of the results in querying the index.