It's an inset picture and link[0]. They collect quite a bit of data[1] (that you can ask for[2]). "Astronomers at the Wilcox Solar Observatory (WSO) monitor

It's an inset picture and link[0]. They collect quite a bit of data[1] (that you can ask for[2]). "Astronomers at the Wilcox Solar Observatory (WSO) monitor the sun's global magnetic field on a daily basis." [0] http://wso.stanford.edu/ http://wso.stanford.edu/ [1] http://wso.stanford.edu/words/plots.info http://wso.stanford.edu/words/plots.info [2] http://wso.stanford.edu/forms/prsyn.html http://wso.stanford.edu/forms/prsyn.html