File:Geological magazine (1891) (14775919404).jpg

Identifier: geologicalmagazi381891wood (find matches)
Title: Geological magazine
Year: 1864 (1860s)
Authors: Woodward, Henry, 1832-1921
Subjects: Geology
Publisher: London (etc.) Cambridge University Press
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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ounded, I have to thank the following gentlemen : the Eevs. J.Johnstone (Lochranza, Arran), D. N. Macdonald (Killean), J. F.McKenzie (Gigha), and H. W. Strang (Campbeltown) ; Mr. E. A.Cavana (Gigha); and especially Mr. J. N. Macleod of Kintarbert andSaddell, without whose aid the account of this earthquake wouldhave been much more imperfect than it is. 1 Geol. Mag. Dec. II. Vol. X. pp. 120-8, 193-7, 337-44 (1883). 368 C. Davison—British JEartl) quakes of 1889. 5. East Cornwall Earthquake : Oct. 7, 1889. Time of occurrence, about 13h. 45m.; Intensity, IV. Epicentrum,about 2f miles S.W. of Altarnon. Disturbed Area.—All the planes, 24 in number, at wbich theearthquake is recorded as having been felt, are included within anarea which is roughly elliptical in form. The larger axis, whichruns nearly east and west, is about 25 miles in length, the shorteraxis about 20 miles, and the whole area disturbed about 400 squaremiles. The curve bounding this area is an isoseismal of intensity IV.
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M.ComwcdL ^arihquxike Oct//ISS9. Nature of the Shock.—The accounts of the shock, though few innumber, are sufficient to indicate roughly the way in which thenature of the shock varied throughout the disturbed area. We maydivide the observations into two groups. In the first we have : Altarnon : a distinct rumbling was heard, as if the chimney wereon fire or a heavy waggon passing up the road; very little if anyperceptible vibration. North Hill: a sound heard as though something had struck thewall of the house, and then the sound seemed to vibrate at theback. C. Dcwison—British Earthquakes of 1889. 369 St. Clether : like a distant peal of thunder or the passing of a veryheavy loaded waggon ; no tremors perceived. Temple: like the rumbling of thunder for a few moments, fol-lowed by a tremulous motion. Treuegloss : a loud rumbling noise like thunder; no tremulousmotion percei^ >d. With the exception of Laneast, from which I have no detailedaccount, these five places are nearer to

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