Since the beginning of the current eruption cycle in early May, , approximately acres of lava deltas have been built where lava distributary channels fall into the ocean. Image by the United States Geological Survey. Lava Flow Map: An updated lava flow map of the East Rift Zone area, showing fissure eruption locations and recent lava flows. Note the location of the former coastline and how the island has been enlarged by lava deltas. Map by USGS. Click to enlarge. In late April , small earthquakes began shaking the East Rift Zone of Kilauea Volcano, located along the southeastern side of the Island of Hawaii.