The Wonder Book of Volcanoes and EarthquakesHouston, Edwin J. (Edwin James)
Science
The Wonder Book of Volcanoes and Earthquakes
Houston, Edwin J. (Edwin James)
Earthquakes; Volcanoes
The place at which this earthquake started was situated, not as usual
on the bed of the ocean, but on the surface of the land. The first
shock was the strongest and wrought the greatest havoc. Besides the
loss of life and property, the damage to the system of dikes or levees
on the river where it passed through the delta plain near the river's
mouth was heavy, and singular in some of its features. In one case,
near the city of Nagoya, on the Bay near the southern coast of Niphon,
one of these levees was lifted and shifted bodily more than sixty feet
from its original position.
That this quake was of the tectonic type was evident from the great
fault that was formed. According to Davison this fault was seventy
miles in length and in places had a breadth of from two to five feet.
It extended from east to west, crossing the entire width of the island.
Another great earthquake was that which hit northeastern Bengal and
Assam in India on the 12th of June, 1897. According to the India
Geological Survey, by whom a careful examination of the effects
produced by this quake was made, it was, perhaps, the greatest quake
that ever happened, not even excepting the Lisbon earthquake.
The place where the quake started appears to have been of unusual size
and irregularity of outline. Its southern boundary was almost in the
shape of a straight line extending from east to west about 200 miles,
and covering a total area of nearly 6,000 square miles. Over all this
vast area the intensity of the shock was exceedingly severe. The total
area perceptibly shaken by the quake was about equal to 1,750,000
square miles.
That this quake was of the tectonic type became evident, when several
faults were found in the ground afterwards. Some of these extended
twelve miles, with a breadth at places as great as thirty feet.
Valparaiso, or, as the name means, Vale of Paradise, the second
largest city of Chile and its chief seaport, lies about ninety
miles east of Santiago, the capital, with which it is connected by a
railroad.
This beautiful sea city is built at the base of a cluster of hills
about 1,600 feet above sea level. On August 16th, 1906, it was visited
by an earthquake. There were two distinct shocks. Contrary to general
rule it was not the first, but the second shock that did the most
damage, coming about ten minutes after the first. As you will see from
the above date the earthquake of Valparaiso occurred shortly after
the catastrophe of San Francisco. In a general way, its coming was
predicted by Dr. G. F. Becker of the United States Geological Survey,
on April 19th, 1906, one day after the San Francisco disaster. Becker
published an article in the "New York Tribune," in which he argued
that the severe shock at San Francisco, having occurred on one part
of the earthquake region extending around the Pacific, would probably
soon affect other portions of this region along the Pacific coast line
of this hemisphere.
Public-domain text, read in full here on John Shaqi.
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