Here’s a video of an eruption of an underwater volcano near the South Pacific island of Tonga on March 19, 2009:
News articles:
London Times: Underwater volcano sends huge columns of ash into Pacific sky
Honolulu Advertiser: 7.9 quake off Tonga could intensify volcano’s eruption
From NASA’s Earth Observatory: Submarine Eruption in the Tonga Islands:
Grace and Peace
GeoChristian 