How To Use Seismal In A Sentence
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Again, in slight earthquakes, such as the Cornwall earthquake of April 1, 1898, [83] the curves of equal sound intensity, while their axes are parallel to those of the isoseismal lines, are displaced laterally with respect to these curves, owing to the arrival of the strongest sound-vibrations from the upper margin of an inclined seismic focus.
A Study of Recent Earthquakes
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Seismic risk models are especially useful to develop isoseismal maps in areas where the earthquake data are only partially available.
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The field oscillation measurements allow to discover coseismal, near seismic and pre-seismic electromagnetism.
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Does it, however, necessarily follow that seismal devastation spreads in
Byeways in Palestine
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The coseismal lines obtained in this manner are represented by the continuous curves in Fig. 62.
A Study of Recent Earthquakes
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Owing, however, to the inevitable inaccuracy of all the time-records, these different zones intrude on one another, and the coseismal lines have therefore to be drawn about half-way through the overlapping regions, special weight being attributed to the apparently more accurate observations.
A Study of Recent Earthquakes
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It will be seen that the coseismal lines are elongated in the same direction as the isoseismals, but to a less extent, and this no doubt is due to the fact that the epoch selected by the majority of observers was one not far from, and slightly preceding, that of the maximum intensity of the shock.
A Study of Recent Earthquakes
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In the Hereford earthquake of 1896, the centre of the innermost coseismal line (Fig. 62) is close to the region lying between the two epicentres.
A Study of Recent Earthquakes
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The curves separating these zones would be coseismal lines corresponding to the times 5. 32-1/2, 5. 33-1/2, and
A Study of Recent Earthquakes
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At Potenza, which is not far from the same epicentre but a few miles outside the meizoseismal area, the separation was more pronounced.
A Study of Recent Earthquakes
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The isoseismal 6 is 105 miles long, 87 miles wide, and contains 7,300 square miles; and the isoseismal 5, 157 miles long, 143 miles wide, and about 17,000 square miles in area.
A Study of Recent Earthquakes
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There is therefore no marked distortion of the isoseismal lines when crossing the hyperbolic band, while the isacoustic lines are completely diverted from their normal course.
A Study of Recent Earthquakes
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The purpose of the coseismal curves based upon these records is in general two - fold.
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Mercalli is probably more trustworthy, it is interesting to compare his isoseismal lines with those obtained by his French colleagues, which are reproduced in Fig. 20.
A Study of Recent Earthquakes
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There is thus an apparent increase in the velocity with the distance, but the accuracy of the coseismal lines is unequal to establishing this as a fact.
A Study of Recent Earthquakes
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We have seen that, in the three earthquakes of 1828, 1881, and 1883, there is distinct evidence of a second meizoseismal area at Fontana, within which the shock was mainly subsultory.
A Study of Recent Earthquakes
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But that centre of _seismal action_ is taken for the site of Sodom -- hence the site of the destruction of Sodom and the starting point of earthquake are the same.
Byeways in Palestine
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Such maps are often referred to as isoseismal or zoning maps and depict acceleration levels predicted for different location in an earthquake zone.
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With evidence so abundant, a new method of drawing coseismal lines becomes possible.
A Study of Recent Earthquakes
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If the meizoseismal area had been a thickly populated one, the evidence of ruined and damaged houses would have provided materials for the construction of isoseismal lines surrounding the two epicentres.
A Study of Recent Earthquakes
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It will be seen that they differ considerably in form, but at the same time they present certain points of agreement, such as the east and west elongation of the meizoseismal area, and the great extension of the two outer isoseismals towards the west and south-west The greatest difference is to be found in the eastern portion of the third isoseismal, which, according to the
A Study of Recent Earthquakes
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The isoseismal 7, which includes places where the shock was strong enough to overthrow ornaments, vases, etc., is also very nearly an ellipse, whose axes are 80 and 56 miles in length, and whose area is
A Study of Recent Earthquakes
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In traversing this range, the shock lost a great part of its strength, while it continued to be felt severely along its eastern foot, thus giving rise to the south-westerly extension of the third isoseismal in Fig. 20, and, though to a less extent, that of the second in Fig. 19.
A Study of Recent Earthquakes
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Several of Bull's research sites are within Sequoia and Kings Canyon National Parks since they are close enough to the San Andreas Fault for coseismal rock falls.
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_ -- Within the third isoseismal line Mallet made altogether 177 measurements of the direction of the wave-path at 78 places.
A Study of Recent Earthquakes
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Mallet himself recognised that these facts required explanation, and he suggested that the situation and character of the towns were in part responsible for their ruin, and the physical structure of the country for the course of the isoseismal lines.
A Study of Recent Earthquakes
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If, however, the number of observations is large for the size of the disturbed area, the construction of coseismal lines may define approximately the position of the epicentre.
A Study of Recent Earthquakes
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The resistance offered by the Sierra Nevada to the propagation of the earth-waves is shown in the former map by the approximation of the first and second isoseismals at the east end, and in the latter by the great bay in the third isoseismal line.
A Study of Recent Earthquakes
