Seismic activity continued to increase. Beginning from April 28, the number and the energy of the events began to decrease slightly. In the morning on April 28, a gas and steam plume rose 300 m above the volcano and extended 5 km to the west. On April 29, a gas and steam plume rose 700 m above the volcano and extended 10 km to the west. In the evening on April 30 and in the morning on May 1, a gas and steam plume rose 100-200 m above the volcano.
Seismic activity continues to be significantly above background levels.
The course of the present seismic activity suggests that if an eruption occurs, it may be similar to that of April 1993. The 1993 eruption was preceded by a significant increase in volcanic and seismic activity. Mud flows extended from the volcano 15-20 km.