To
complete
this
worksheet,
see
the
instructions
in
the
textbook (Chapter
12
Investigation).
Table
1.
Using
Seismograms
to
Locate
an
Earthquake
Observations:
Using
the
Chapter
12
Investigation
in
your
textbook,
look
at
the
area
and
read
the
descriptions
associated
with
each
location.
Think
about
what
each
statement
implies
about
possible
earthquake
hazards
for
that
location.
The
blue-gray
triangles
represent
the
location
of
seismic
stations
in
the
area.
The
P-S
Time
Interval
for
the
three
stations
(Mesaview,
Hillside,
and
White
Sands)
provides
information
on
where
the
earthquake
occurred.
Plot
the
P-S
time
interval
(the
time
between
the
arrivals
of
the
P-
waves
and
S-Waves)
for
each
station
on
the
graph
below.
Then
use
the
distances
calculated
from
the
graph
to
determine
approximately
where
the
earthquake
occurred.
Answer
the
question
below
the
graphs.
Three
Seismograms
Graph
to
Determine
Distance
from
Epicenter
P—0.78
sec—§
’E
8
!
!
g
Mesaview
|
)
|
€6
P-0.45sec-§
e
Hilside
-
iipadtilhi,
.
<4
illside
i
bt
o
[t
c
2
P—{S-\O.ZS
sec
8
White
L)
0
Sands
i
.
0%
02
04
06
08
10
P-S
Time
Interval
(seconds)
Station
Distance
from
earthquake
(circle
the
letter
for
the
best
answer)
Mesaview
(a)
2-3
km,
(b)
3-4
km,
(c)
4-5
km,
(d)
5-6
km,
(e)
6-8
km
Hillside
(a)
2-3
km,
(b)
3-4
km,
(c)
4-5
km,
(d)
5-6
km,
(¢)
6-8
km
White
Sands
(a)
2-3
km,
(b)
3-4
km,
(c)
4-5
km,
(d)
5-6
km,
(¢)
6-8
km
From
the
general
location
of the
earthquake,
which
geologic
feature
is
likely
to
have
caused
the
earthquake?
