Original: Officials said about 500 volcanic earthquakes had been recorded on the mountain over the weekend of 23 â "24 October, and that the magma had risen to about 1 k below the surface due to the seismic activity.
Simplified: Officials said hundreds of volcanic earthquakes had been recorded on the mountain over the weekend of 23 â "24 October, and that the magma had risen to about 1 kilometre (3,300 ft) below the surface due to the seismic activity.