A cosmic explosion with an energy level equivalent to the output of a billion of suns went unnoticed by astronomers — until they caught the "echo" of this so-called gamma-ray burst, that is.

A recent observation has revealed the prelude to one of the sun’s most powerful flares, captured in unprecedented detail.

Lassen Peak had its most powerful explosion in a series of eruptions that occurred between 1914 and 1917. Take a look at ...

Klyuchevskoy volcano in eastern Russia began erupting shortly after a powerful 8.8 magnitude earthquake and several aftershocks shook the same area. "A descent of hot lava is observed on the western ...