1980 Mount St. Helens eruption
...that the 1980 Mount St. Helens eruption in Washington was the first major volcanic eruption to occur in the U.S. since the 1915 eruption of Lassen Peak in California?
...that the <b id="mwew"><a class="mw-redirect" href="./1980_Mount_St._Helens_eruption" id="mwfA" rel="mw:WikiLink" title="1980 Mount St. Helens eruption">1980 Mount St. Helens eruption</a></b> in <a class="mw-disambig" href="./Washington" id="mwfQ" rel="mw:WikiLink" title="Washington">Washington</a> was the first major <a href="./Volcano" id="mwfg" rel="mw:WikiLink" title="Volcano">volcanic</a> eruption to occur in the <a href="./United_States" id="mwfw" rel="mw:WikiLink" title="United States">U.S.</a> since the <a href="./1915" id="mwgA" rel="mw:WikiLink" title="1915">1915</a> eruption of <a href="./Lassen_Peak" id="mwgQ" rel="mw:WikiLink" title="Lassen Peak">Lassen Peak</a> in <a href="./California" id="mwgg" rel="mw:WikiLink" title="California">California</a>?