original: with little warning , a second earthquake of magnitude 5.1 may 18 triggered a massive collapse of the north face of the mountain .
simplifications: with little warning , a second earthquake that was a magnitude of 5.1 in strength occurred on may 18th , which caused a collapse of the north side of the mountain . suddenly , a second earthquake of magnitude 5.1 on may 18th caused a big collapse of the north face of the mountain . with little warning , a second earthquake of magnitude 5.1 may 18 caused a huge collapse of the north side of the mountain . with little word of advice , a second earthquake of magnitude 5.1 may 18 triggered a massive collapse of the north face of the pile . on may 18 a second earthquake of magnitude 5.1 triggered a massive collapse of the north face of the mountain , with little warning . on may 18 , with little warning , a second earthquake of magnitude 5.1 , triggered a massive collapse of the north face of the mountain . without warning , a second earthquake of magnitude 5.1 may 18 caused a large collapse of the north face of the mountain . with little noticed , a second earthquake of magnitude 5.1 may 18 triggered a huge collapse of the north face of the mountain