The Grenada sentinel. [volume] (Grenada, Miss.) 1868-1955, 1906-05-19
SEES SEISMIC PERIL.
PROF. GOODE OF CHICAGO UNI.
VERSITY ON EARTHQUAKES.
Tremors in Region Of the Garden
City as Symptoms-Record Of
Earthquakes in San
Francisco.


Chicago.-There are slight indica
tions that Chicago may experience
an earthquake within a few years
according to Professor ]. Paul Goode
Of the University of Chicago geology
faculty. The presence of certain
species Of rock in the earth inside
or near the city limits, he believes,
is an indication of a condition that
might result in the dismantling of q
portion Of the city.
There is no absolutely geological
proof that Chicago may have an
earthquake in the next few years."
Professor GOode declared. "One can
detect slight symptoms, however.
Certain formations of certain kinds
Of rock underneath Chicago might
be taken as an indication. An earth
quake is as simple as the breaking
Of a timber.
Il bolisve that the seat of the
disturbance at San Francisco was
about seven miles below the surface
of the earth. 1t was quite probable
a slipping of the crust of the earth.
Generally one block of the crust
slips up while the other slips down.
The focus of the disturbance may be
noted by the direction of the cracks
in the Sierra Madra Mountains are
n the wrecked buildings.
THE Sierra Madra Mountains are
young and are growing slowly. and
no doubt their growing was the
cause of the earthquake"
According to Rollin d. Salisbury,
OF the university, California has ex-
perienced close to 1000 earthquakes,
OF which number AT have occurred
in San Francisco.
Previous to 1887, 948 earthquake
shocks have been recorded in Call
he stated. "Of these AIT :
have taken place in San FransicO.
Since that date the earthquake rec.
ord of California, SO far as available,
) as follows: 1888, So; 1889, 40: 1890,
30; 1891, 81; 1892, 20; 1893, Al; 1894,
50; 1876, SO; 1896, 40; 1898, &c.
THE majority OF this large num-
Of earthquakes were the merest
remOrs. Many OF them would have
PASSED unnoticed but for the exist
'nce at various points OF seismo-
which record movements
much too slight to be sensible.
practically half of the earthquakes
ecorded in California have been felt
the vicinity Of San Francisco. ;
)nly a few, however, were severe
nough to be destI Ictive. The most :
evere was April Is 1902. Others c
evere enough to be destructive &C. :
urred April Il, 1892, and March 80,
1913. A careful record OF earth u
uakes n of earth tremors has h
cen made at Lick Observatory and :
n Mount Hamilton I
According to Professor Ulysses S. =
rant, head Of the geology depart g
ent of Northwestern University, n
lere is no city in the country in Il
hch a great earthquake could be a
ore destructive than in San Fran lt
SEQ, because the western city is +.
III Oh oOiIu lOuIudllOIi VI fOth. -
IF a shock of equal severity had II
in Chicago" said he, 1T is
few buildings would have
zen destroyed, because of the clay =
ID gravel foundation of the city. 1t
probable there may be smaller
in the Western States for a RI
days, and there may be consid- p
able danger from tidal waves, for 70
csc things are likely to come at l%
&c. ~
In fact. 1t may be thai so severe a nj
Ock as the recent enc in San Fran Sc
co may bring III a tidal wave that te'
be large enough TO extinguish tn,
, flames along the water front. tel
1 cannot say that | think there is 7
Y connection between the eruption 5
Vesuvius and the earthquake in
because the two phe- =
are of different origin. The
is of the sort that is caused :
sliding or slipping in the rocky the
st from cooling. Besides this, the Ex,
: of volcanic sympathy which for
-ses a chain of earthquakes to oc- Eot
at about the same time, runs ty.
n north to south" est
ate
~ Gre