The <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Solar_storm_of_1859" id="mwnA" rel="mw:WikiLink" title="Solar storm of 1859">Carrington event</a> is the strongest <a href="https://en.wikipedia.org/wiki/Geomagnetic_storm" id="mwnQ" rel="mw:WikiLink" title="Geomagnetic storm">geomagnetic storm</a> on record to strike the Earth. <a href="https://en.wikipedia.org/wiki/Electrical_telegraph" id="mwng" rel="mw:WikiLink" title="Electrical telegraph">Electrical telegraph</a> service is widely disrupted.