Original: On 14 April 2010 Eyjafjallajökull resumed erupting after a brief pause , this time from the top crater in the center of the glacier , causing meltwater floods ( also known as jökulhlaup ) to rush down the nearby rivers , and requiring 800 people to be evacuated .
Simplified: On 14 April 2010 Eyjafjallajökull started to erupt heavily from the top crater in the center of the glacier .