Word: seismologist
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
...earthquake was apparently the result of the Adirondack region's slow physical secession from the rest of New York State, according to Joseph Steim, a research assistant in the department of Geological Sciences and a seismologist at Harvard's Oakridge observatory at Harvard, Mass. "The entire region has been undergoing a general uplift for more than a hundred million years," Steim added, explaining that "nonuniform stresses within the region results in fracturing...
...registered an 8.3 on the Richter scale. Yesterday's, in comparison, probably brought no damage because it started in an unpopulated area. Even if it had centered in a major city it would only have caused minor damage to a few chimneys, walls, and tombstones, said John Ebel, a seismologist at an observatory in Weston, Mass...
What set off the warning bell was the observation by Seismologist Alan Ryall of the University of Nevada of volcanic-type earthquake activity. In 1980 the shallowest quakes were originating at a depth of about 3 miles. By last summer, they were occurring only 2 miles below the surface. Roy Bailey, coordinator of the U.S.G.S.'s volcanic hazards program, suggests that the quakes were caused by the slow upward movement of a tongue of magma-the hot molten rock that forms a volcano's lava. Still another sign: the outbreak of new steam vents, or fumaroles...
...being wrenched by other forces within this broad pressure pattern. It is being pinched from the west by the Eurasian plate and from the east by a subdivision of the African plate known as the Apulian. Presumably, strains from these opposing forces caused the Italian quake. Says Florence-born Seismologist Leonardo Seeber, now at Columbia University's Lamont-Doherty Geological Observatory: "In Italy we are even worse off, in that we understand very little about the tectonics there...
...Helens began to rumble. The Cascades form the most volcanically active mountain range in the U.S., excluding Hawaii and Alaska. Comparatively young, they are still being shaped by forces deep within the earth. Mount St. Helens, a mere 37,000 years old ("A baby in geologic terms," said a seismologist), is one of the youngest in the range. It last erupted in 1857. Studying the evidence of explosions during the past 4,500 years, Geological Survey scientists predicted in 1978 that the symmetrical peak, visible from Portland 40 miles to the southwest, would blow before the year 2000. Two weeks...