Seismic activity at Sheveluch volcano, which declined slightly since April 28, began to increase again on May 1. Many shallow earthquakes and episodes of weak spasmodic volcanic tremor were registered.
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. The active lava dome can be seen in the center of the image as a small circular feature south of the snow-capped summit area. The broad debris apron to the south of the dome respresents pyroclastic deposits from the 1964 eruption.