Word: seismographs
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...severe earthquake, lasting for over three hours, and of an origin estimated at 10,350 miles from Cambridge, was recorded yesterday morning at 1.54 o'clock at the Harvard Seismograph Station. The quake occurred about 20 minutes before the first waves reached Cambridge, having come from a location which is a little over 200 miles short of half way round the globe from here. The quake was of a kind that makes definite computations difficult to obtain...
...during the recent earthquake at New Zealand, which resulted in many deaths and unprecedented damage, were explained yesterday by L. D. Leet, instructor in Seismology, and director of the station. The earthquake, which occurred last Tuesday night, was recorded the previous evening at 6.06 o'clock by the University seismograph machines...
...explained by the fact that New Zealand is 9,000 miles to the east, of Cambridge. The distance was traversed by tremors passing 1,800 miles beneath the earth's outer crust, in 19 1-4 minutes, which registered a displacement of one thousandth of an inch on the seismograph machine. Dr. Leet regards it as a curious coincidence that on Monday, June 16, 1930, the record of a disturbance coming from the same locality was registered at a time only 69 seconds earlier than the recent earthquake...
...vibrations sent out by the earthquake in New Zealand yesterday afternoon took 19 1-4 minutes to reach Cambridge, the seismograph at the Harvard station revealed...
Rising Sierra. Study of the records of eleven seismograph stations taken during an earthquake last Thanksgiving day in Nevada and California indicated that the Sierra region is rising, said Professor Perry Byerly, seismologist of the University of California. A comparison with recent material on Pacific Ocean disturbances showed a heavier granite formation in the Pacific region, indicated that the ocean bed is crowding against the lighter Sierra region, is shoving the mountains higher...