The Michigan Daily Vol. XC, No. 44-S Ann Arbor, Niichigan- -Wednesday, July 23, 1980 Ten Cents Sixteen Pages plus Supplement St. Helens erupts after six-week- dormancy VANCOUVER, Wash. (AP) - Mount St. Helens broke a six-week silence with four towering ash eruptions yesterday after a series of increasingly frequent earthquakes, the U.S. Geological Sur- vey said. A pyroclastic flow of superheated gas, ash and rock also rolled down the north slope of the mountain reaching to Spirit Lake, the USGS said. THERE WERE no immediate repor- ts of injuries. Residents of Cougar, about 15 miles southwest of the volcano, were being evacuated as a precautionary measure, said the Cowlitz County sheriff's office. A mushroomrshaped cloud of ash towered to a height of 45,000 feet in the first eruption at 5:14 p.m. PDT, the National Weather Service reported. THE NWS SAID the ash was heading north-northeast toward many of the eastern Washington areas blanketed by AP Photo A PLUME OF SUPERHEATED volcanic ash spews from Mount St. Helens in this photograph taken June 15. The mountain roared after a six-week break yesterday, emitting no less than four separate mushroom-shaped clouds of dust and debris. FLIGHT COMMANDEERED TO CUBA: Delta jetliner skyjacked ash during the mountain's first massive eruption on May 18. A second eruption came at about 6:25 p.m., with a darker cloud and larger plume rising to above 50,000 feet, said Carl Burgeson, spokesman for Gifford Pinchot National Forest. A third plume appeared shortly after 7 p.rp., authorities said, followed by a fourth blast at about 7:20 p.m. WITHIN AN hour of the first erup- tion, observers ina U.S. Fborest Service plane reported that a lava dome which had been slowly growing in the crater since the last eruption June 12 appeared to have a hole blown through it. "It looks like it blew its core,' said Phil Cogan of the Federal Emergency Management Agency. A Forest Service spokesman said 120 firefighters near the mountain were evacuated safely to the Mount Adams Ranger Station in Trout Lake, about 55 miles east-southeast of the volcano in southwestern- Washington. The crews had been fighting fires started by the May 18 eruption which had been smouldering beneath a blanket of ash.... BURGESON SAID logging crews also apparently were out of the danger area. "As far as we have it, nobody is in the red zone," the restricted area around the volcano, he added.. Because the volcano had remained quiet for several weeks, state officials in recent days had moved to reduce the red zone, loosening the restrictions on public access to areas around the mountain. - INITIAL REPORTS indicated a light ashfall in White Pass, 15 miles nor- theast of the peak, within an hour after the eruption started at 5:14p.m. PDT. "It looks like the real thing," said USGS geologist Tim Hait. "It's got a real beauty to it." Lt. George Engledow of the' Washington State Patrol said troopers were put on standby alert in Yakima, Spokane and the Tri-Cities of Richland, Kennewick and Pasco. The National Weather Service issued a precautionary flood watch for areas within 10 miles of the volcano. MIAMI (UPI)-4 Delta Air Lines jetliner en route from Chicago to San Juan, Puerto Rico, with 147 persons aboard was hijacked to Cuba last night by a man who said he was a Puerto Rican with "personal problems." After it was forced by foul weather to land at the airport in remote Camaguey, 300 miles southeast of Havana, Delta Flight 1135 returned safely last night to Miami, its last stop before it was hijacked. DELTA OFFICIALS SAID none of the 132 passengers left aboard or the 14 crewmembers was harmed. While FBI agents interviewed the passengers, workers refueled the Lockheed 1011so it could continue to San Juan. FBI agent Bill Nettles said the unidentified hijacker arose from his seat in the first class section when the plane was 200' miles over the water from Miami, produced a small handgun and grabbed a stewardess. Twisting her arm, Nettles said, he forced her to the door of the cockpit, where she used the intercom to tell pilot L. } Gildermaster that the man wanted to go to Havana. NETTLES SAID THE gunman was never allowed into the cockpit. He said he kept the gun in the stewardess' back during the entire flight, The gunman spoke only Spanish, Nettles said, and told the stewardess he was a Puerto Rican "who wanted to go to Cuba because he had personal problems here. He wanted to get. away." Nettles said it had not been determined whether he boar- ded the plane in Chicago, where 16 passengers came aboard, or in Miami, where the other 117 joined the flight. The man also claimed he had a knife apd a bomb. Nettles said witnesses reported he "kept switching something from one pocket to another," but apparently nobody saw what it was, and no one saw a knife or a bomb. Upon reaching Havana, Gildermaster found visibility down to zero and Jose Marti airport closed. Havana Control Tower ordered him on to Camaguey, where the plane finally set down about 4:30 p.m., an hour and a half after it was hijacked. The hijacker was taken away, Nettles said, by two uniformed officers and two men in plain clothes, and the plane took off again. Havana air authorities sent it over Jose Marti again, and then passed it out of Cuban air space. Fuel considerations, Delta officials said, precluded it going on to San Juan:.