The Wallace miner. [volume] (Wallace, Idaho) 1907-current, 1922-12-14

slsts nave inferred that the Nortl
I American Great Lakes. whose bed
extend many feet below sea level
were formed by slow warping dis
placements
Effect at New Madrid.
A clearer case is the New Madrie
displacement This case involved ,
series OF earthquakes covrelng the
period from December, 1911. tar into
1872. The region involved extended
from southeastern Missouri into Ar
Kansas The testimony OF witnesses
shows that the tops OF black walnut
and other bottom land trees were COW
cred by the water which gathered
within the depressions The lakes
ana ponds within the sunken area
were greatly enlarged and new lakes
We're created 10 this day the area
IS known as the sunk region. The
quakes and tremors were due to sud
den earth movements.
Many displacements have occurred
in localities where the rock layer is
covered by the sea. Such movements
have created the tremendous waves
popularity known as tidal waves The
Lisbon earthquake OF 1855 was an in
stance The shatterlng OF the walls
.oI buildings drove the frightened peo-
pie to the quay and the sea shore.
where they might escape falling walls.
Then huge wave rolled in from the
sea and engulfed them. At the docks
the Tagus river rose 40 feet above its
ordinary level
Tidal waves are common enough
along the Pacific coast Of South Am
erica. In 1868 a severe shock wrought
havoc in the region around africa.
then lively port OF 10000 population
IN Peru and now a small and almost
shipless port. The United States war
ship Wateree, then at anchor in the
port was carried high on the crest of
the wave and dropped gently in
stream bed several miles inshore.
Recent Shocks.
The recent shocks along the Chilean
coast have again brought up the
question of eXtraterrestrial causes OF /
earthquakes and alsO d discussion OF /
The possibility OF forecasting them. At |
east one theory, that OF the electrical
origin OF quakes, may be dismissed as
ingenious and interesting but without
evidence to substantiate it.
A small class Of theorists who at
ribute many OF the things which vex
humanity to planetary influences as
ert that planetary positions account
or the occurrence of earthquakes.
certain it is that the conjunction OF
everal planets exert a theoretical
train but their combined attraction
S not sufficient to produce a measur-
BILE tide in the ocean; it is negligible
with that of the moon. Ii
he conjunction of several planets
reduces enough gravimetric force 10
reate an ocean tide the tide is too
considerable to be measured.
Theories Explained.
When we consider the possible
0rce of the moon the question is more {
The attractive force of {
ne moon is sufficient to mass a vol {
me of water several thousand miles {
l width, extending theoretically from
ole to pole. The tide in question has {
midocean depth of about three feet
here are two of these tides, and in
lrning upon it's axis the earth slips {
nder each one in a period a little
lore than twelve hours. To express
/ figures the weight of the water i
lrown upon a given area would have q
ut little meaning. The observations q
Alexis Perry show pretty positively 7
lat earthquakes are rather more fire. q
lent when the moon is on the meri-
an than when it is on the horizon, C
lerefore the influence of the tide d
errey has shown also that earth f
lakes are rather more frequent when a
lie moon is nearest the earth and s
hen the earth is nearest the sun. n
This does not mean that the moons Ii
traction and the massing of the b
les causes earthquakes; it does in
cate, however, that the attraction of 81
e sun and the moon may have a s.
effect in fixing the time s.
which they occur. That is, when n
earth strain not quite sufficient to re
eak the rock layer occurs the posi- -
IN of the sun and the moon may adj c.
nee or it may retard the time of oc- h
rrence
May Forecast Earthquakes.
Perhaps the time will come when
may be forecast as wea-
er forecasts are made; but the time
not now. The sonic depth finder
Gently put into use as a very prac-
al apparatus for measuring the sea
pths will certainly give new and
tier methods for finding the focal
int of earthquakes which original
? below the sea bottom cause the
structive tidal waves, but it will not
lp in the matter of forecasting
rthquakes.
The researches of Milne and Mallet
ord little or no help in this respect.
e testimony of DR. On1Ori of the