SCOSTEP conducts quadrennial symposia to review the status of the field and highlight current results in the field of solar terrestrial physics (STP) - an important field that has important societal implications on Earth. The next quadrennial symposium will be the 13^th in the series (STP13) and will be held in Xi’An China (the place of Terra Cotta Warriors) during October 12–17, 2014. STP13 will be all inclusive on solar terrestrial physics from solar interior to Earth’s atmosphere. The sessions will be organized along the connectivity chains between Sun and Earth: electromagnetic chain (irradiance, affecting climate and flares causing space weather), mass chain (mass ejections and fast solar wind leading to geomagnetic storms), energetic particle chain causing space weather and atmospheric impact (ozone depletion, etc). Additional topics will be included to cover all the aspects of STP including new initiatives in space and on the ground.

Professor Chi Wang (National Space Science Center, Chinese Academy of Sciences) and SCOSTEP/China have agreed to host STP13. The web site is now open and you can register: http://stp13.csp.escience.cn.