... that although the summit of submarine volcanoLōʻihi is 969 metres (3,180 ft) below sea level, it is still twice as tall, measured from the base of its southern flank, as Mount St. Helens ever was?
... that a sub-marine eruption near the Hunga Tonga-Hunga Haʻapaivolcano in Tonga began spewing steam, smoke, pumice, and ash thousands of feet into the sky on March 16, 2009?