always depressed and shifted westwards by about 6-1/2 feet.
[Illustration: FIG. 49.--Map of Swamp formed by stoppage of River
Toba by Fault-scarp. (_Koto._)]
[Illustration: FIG. 50.--Shifting of Trees by fault at Uméhara.
(_Koto._)]
It was in the Neo valley that the supreme efforts of the earthquake
were manifested. Landslips were so numerous that the greater part of
the mountain slopes had descended into the valley, the whole
appearance of which had changed. "Unfamiliar obstacles," remarks
Professor Koto, "made themselves apparent, and small hills covered
with forest had come into sight which had not been seen before." But
the ground was not only lowered and shifted by the fault; it was
permanently compressed, plots originally 48 feet in length afterwards
measuring only 30 feet. In fact, "it appears," in the words of
Professor Milne, "as if the whole Neo valley had become narrower."
A few miles after entering the Neo valley, the throw of the fault
reaches its maximum at Midori. But instead of the relative depression
of the east side, which prevails throughout the rest of the line, that
side is here about 20 feet higher than the other. It is, however,
shifted as usual towards the north, by about 13 feet; and this
displacement is rendered especially evident by the abrupt break in the
line of a new road to Gifu (Fig. 47). That the east side has really
risen is clear, for, a little higher up, the river has changed from a
shallow rapid stream 30 yards wide into a small lake of more than
twice the width, and so deep that a boatman's pole could not reach the
bottom. At Itasho, about a mile north of Midori, both sides are nearly
on the same level, the fault appearing like a mole's track; and seven
miles farther, at Nagoshima, the east side is relatively depressed by
more than a yard, and at the same time shifted about 6-1/2 feet to the
north.
[Illustration: FIG. 51.--Daily frequency of after-shocks at Gifu
and Nagoya.]
At Nogo, the main Neo valley turns off at right angles to the east,
and the fault continues its course up a side valley, the east side,
with respect to the other, being continually depressed and shifted
towards the north. It was traced by Professor Koto through Fujitani
(Fig. 46), where there were many unmistakable evidences of the
violence of the shock, as far as the eastern shoulder of Haku-san; and
here, after following the fault for 40 miles, the lateness of the
season compelled him to return. There can be no doubt, however, that
it runs as far as Minomata; and it is probable, from the linear
extension of the meizoseismal area, that it does not entirely die out
before reaching the city of Fukui, 70 miles from its starting-point at
Katabira.
MINOR SHOCKS.
Public-domain text, read in full here on John Shaqi.
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