Why does a volcano erupt?
Las Vegas’ Krakatoak volcano erupted on Sunday, spewing ash and rock into the air and leaving behind a trail of ash that spread in a westward-flowing path.
The eruption came as a surprise, with the last time lava flowed into the volcano was in 1908, but experts said that would be the last eruption of its kind.
Krakatoaks eruption was the second largest eruption since the volcano erupted in 1874, according to the National Volcanic and Atmospheric Administration (NVA).
The eruption happened at 10:52 p.m. local time (1452 GMT), according to officials.
It took some 20 minutes for lava to reach the surface, with ash and boulders falling in the air, but no injuries were reported.
The lava flow also triggered a small earthquake, with tremors measured at 0.8 on the Richter scale.
It was the fourth eruption of Krakatau in the past two weeks.
It also had a smaller and weaker eruption in January.
The most recent lava flow occurred on August 14.
In February, an eruption killed three people in the volcano’s Pu’u ‘Ōnō Volcano, which is in the western part of the island chain.