The methane gas floats on the water's surface as many tiny bubbles. The density of the resulting gas-water mixture is much less than that of seawater. If a ship finds itself in such an area, due to the lower density, it quickly sinks below the actual sea surface, and the crew is unable even to make an emergency call. The ship sinks.
In the case of Flight 19, several witnesses confirmed that they saw an explosion in the sky. However ...
The eruption, which occurred on the morning of May 13, 2008, immediately east of Etna's summit craters, was accompanied by more than 200 earthquakes and significant ground deformation in the Etna area.
The eruption lasted 417 days until July 6, 2009, making it the longest eruption on Etna's flank sinc ...
Whether the Amazon is the longest river on earth is still a matter of debate.
It may be longer or shorter than the Nile, depending on the measurement criteria used. It's length may be anywhere between 6,275 and 6,992 km, while Nile is estimated to be between 5,499 and 7,088 km.
