It happened that they had two great earthquakes in the north eastern part of Shanhsi Province in this century, but no such great earthquakes had occurred in that district throughout the Ming and Ch'ing period, 1368-1911. The two maps most clearly indicate the features of these earthquakes. These two earthquakes resemble each other. They are near to each other in their epicentres, most heavily damaged areas, dates, with their whole disturbed areas covering nearly the same region. Their magnitudes presumed to be just the same, MK=5.8, M=7.7. The longest radius of the earthquake A is 618km, and that of B 534km, but if the earthquakee at Nant'ung, Chiangsu Province, is to be identified with A, the former radius amounts to as much as 1026km.
Concerning to both earthquakes, destruction of buildings or city walls, spurts of water, cracks of earth, the dead and injured of men and beasts were seen everywhere within the circle of VI isoseismal. The most heavily damaged area of A was Lingch'iûhsien, where all the constructions were completely destroyed, the death-roll over 5200. As to B the detailed states of Yüanp'ingchên are uncertain, but the damages there are said to have been the severest. The total of death-roll in various places is conjectured no less than several thousands.
The first shock of A is recorded to have occurred about 3 a. m. 28 June, 1626, and that of B between 11 a. m. to 5 p. m. 22 November, 1683. The data about the foreshock cannot be found, but concerning the aftershocks, those of A continued until over one month after, while those of B are recorded to have ranged the period from a few months at least to several years at most.
抄録全体を表示