Complex sentence: In the years before the 1883 eruption, seismic activity around the Krakatoa volcano was intense, with earthquakes felt as far away as Ausning May 20,1883, steam venting began to occur regularly from Perboewatan, the northernmost of the island's three cones.
Split into simpler sentences: In the years before the 1883 eruption, seismic activity around the Krakatoa volcano was intense, with earthquakes felt as far away as Australia. Beginning May 20,1883, steam venting began to occur regularly from Perboewatan, the northernmost of the island's three cones.