The Michigan Daily-Thursday, May 29, 1980-Page 5 Quakes shake Mt. St. Helens area; eruptions could continue VANCOUVER, Wash. (AP) - A pair of earthquakes shook the area around Mount St. Helens yesterday and scien- tists warned that another massive eruption could come from the volcano at any time. The volcano, which exploded May 18 with a fury that left incalculable devastation, continued to simmer, spewing a plume of steam and ash three miles high. WITH THE death toll at 21 and 71 people listed as missing, a dozen helicopters searched under clearing skies for possible survivors. But authorities said there is little chance of finding any more people alive and the air search probably will be called off by the weekend. Rescuers brought out 128 survivors in the first two days following the erup- tion, but since then have found only dead bodies and a German shepherd with her pups. Two moderate earthquakes shook Mount Margaret, about eight miles nor- th-northwest of the volcano yesterday, but scientists did not know what con- nection they had with Mount St. Helens. THE MOUNT Margaret quakes, measuring 4.0 and 3.8 on the Richter scale, were felt as far away as Kelso and Longview, 40 miles to the west. They also rattled the Cowlitz County jail in Longview. The quakes were the first significant seismic activity near Mount St. Helens since a 90-minute harmonic tremor throbbed through the mountain Tuesday afternoon. Harmonic tremors are rhythmic ground movements which geologistsbave linked to steam and ash emissions and which may signal the movement of magma within or below the mountain. Scientists have had little luck forecasting what the mountain would do since it first started acting up three months ago. However, Dwight Cran- dell, chief of hazards evaluation for the U.S. Geological Survey, outlined a new scenario of potential hazards. "As long as we are getting any gas- rich magma coming out of the volcano, there is a chance of a large eruption anytime," he said. Magma is molten rock. Crandell said lateral eruptive blasts, like the one on May 18, could cause damage extending about 12 miles north of the mountain. He said pyroclastic flows - streams of superheated rock - could come down any slope of the volcano, touching off mudflows. AP Photo ARMY PFC PAT PUIIR of the 9th Infantry Division, Fort Lewis, Wash., walks towards an abandoned campsite near the foot of Mount St. Helens Tuesday as the search for 68 missing persons continues. Twenty-one persons have been declared dead after the volcano erupted May 18, spreading death and destruction. Fuel tankr- RING SPECIAL rams bus, 20 killed in inferno SWIFT CURRENT, Saskatchewan (AP)-A fuel-tank truck smashed into the rear of a bus carrying a CP Rail crew about 20 miles west of here yesterday and exploded in flames, killing more than 20. Bodies of some victims were scat- tered on the shoulder of the Trans- Canada Highway near the Alberta- Saskatchewan borders. Some survivors were badly burned. "'WHEN WE GOT the fire out, there were four more bodies between the bus and the semi-tanker that were burned," said John Martin of nearby Webb, Saskatchewan, one of the first persons on the scene. "Finally, when we got the fire cooled down or calmed so that we could get to the bus body, we lifted it.. . and found about 20 to 24 guys. There were some more bodies underneath it. They were underneath the body of the bus right on the highway." Asked if they were dead, Martin replied: "They were. We loaded some in 'the back of a half-tone before the ambulances got there." SHIPSHAP E Full grain leather in classic moccasin C'-N style. Genuine rubber soles. Sized for men and women who wanf to keep in F step with today's casual fashions. Big on comfort. Long on wear. Unmistakably BASS". B WOMEN'S REG. '40.00 NOW $30.00 MEN'S REG. '55.00 NOW $41.25 - cc. 529 E. LIBERTY Hours: ANN ARBOR MasterCharge and VISA honored M-F 9:30-8:00 665-9797 _WSAT 9:30-6:00