Latitude-dependent delay in the responses of the equatorial electrojet and &amp;lt;i&amp;gt;S&amp;lt;/i&amp;gt;&amp;lt;sub&amp;gt;&amp;lt;i&amp;gt;q&amp;lt;/i&amp;gt;&amp;lt;/sub&amp;gt; currents to X-class solar flares
Annales geophysicae