explain the phenomenon of production of shoke waves in earthquake
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Phenomena Of Earthquakes
The phenomena of earthquakes differ greatly in accordance with the number, duration, and intensity of the shocks, and with the distance of the place of observation from that of the origin of the disturbance. One of the greatest of modern earthquakes is that of northern India of 1897, which is well summed up in the official report.
"On the afternoon of June 12,1897, there burst upon the western portion of Assam an earthquake which, for violence and extent, has not been surpassed by any of which we have historic record. Lasting about .two and one-half minutes, it had not ceased at Shillong before an area of 150,000 square miles had been laid in Tuins, all means of communication interrupted, the hills rent and cast down in landslips, and the plains fissured and riddled with vents, from which sand and water poured out in most astounding quantities; and ten minutes had not elapsed from the time when Shillong was laid in ruins before about one and three-quarter million square miles had felt a shock, which was everywhere recognized as one quite out of the common." (R. D. Oldham).
The phenomena of earthquakes differ greatly in accordance with the number, duration, and intensity of the shocks, and with the distance of the place of observation from that of the origin of the disturbance. One of the greatest of modern earthquakes is that of northern India of 1897, which is well summed up in the official report.
"On the afternoon of June 12,1897, there burst upon the western portion of Assam an earthquake which, for violence and extent, has not been surpassed by any of which we have historic record. Lasting about .two and one-half minutes, it had not ceased at Shillong before an area of 150,000 square miles had been laid in Tuins, all means of communication interrupted, the hills rent and cast down in landslips, and the plains fissured and riddled with vents, from which sand and water poured out in most astounding quantities; and ten minutes had not elapsed from the time when Shillong was laid in ruins before about one and three-quarter million square miles had felt a shock, which was everywhere recognized as one quite out of the common." (R. D. Oldham).
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