Page 236 - Whole Earth Geophysics An Introductory Textbook For Geologists And Geophysicists

miles

219
arrival
center.
a
on
if:
shear
in
like
seismograph
(a), but
and
look
to
the
Exercises
relative
compressional
starting halfway to
in
would
as

a
material
correctly,
by
seismograms
PLATE
recorded
4, Ouse
same
,
detect
compare
liquid core
NORTH
is
the
what
7-2
and
can
were
times
seismograph
Earth
sketch
Exercise
Z
Earth
a
with
arrival
the
and
the
of
solid, but
times
liquid; b)
side
for
your
The
Map
one
travel
diagram).
sure
CA.
were
ae
on
entirely
be
Compute
Earth
occurs
(c),
(see
(a).
and
were
the
earthquake
side
arrivals.
part
(b)
state; c)
Earth
other
parts
for
the
times
wave
solid
For
the
An
a)
7-3
. ak Seismograph A Earthquake Diagram 7-3 for Exercise recorded is earthquake An 7-4 Seismic. epicenter. the from km 7,500 City. York New in | waves P-phase The station. a at arrive they when east due traveling are a as arrives compression.
PKP phase, encrgy through inner core esti-
is
earlier increase the that that phase core, but outer rela- to the travels as S-wave energy month exactly in com- event earth- 4 station Mean map. illustrate: compression E-W and S-wave; f) time, arrival P
in
Earth abrupt suggests waves as liquid the from wave the solid London. A occurs second magnitude seismic (Greenwich of N-S first origin the for waves.
the (“PKJKP” outer the (compared in a of the Z, P-wave; e) the
of an interpreted the from phase motion, the many GMT On quadrants Draw motions surface
side velocity energy as of expected travels as compressional energy (Fig. 3.19) through recorded fault for be how directly south 6:00 km. fault. first include first of the
other 7.28), suggesting higher been composition change change (Figs. 2.7, 2.8). than (“K" and “P™ again). The SKJKS phase is of London to is 1000 is corresponding the
the have S-wave phase the te and type ; fault, time for arrivals: d) seismograms phases, correct of dispersion
on and 7.36). This to arrives sooner PKJKP phase in Turkey same in equivalent origin epicenter solution
arrive Figs. 7.27 (Fig. arrivals (converted) chemical The pressure. analogous mesophere phase to shear wave occurs the with recorded be would Andreas San The the to the b) fault; mechanism following your sure four portrayal
Seismology P-waves weak in phase depth km weak Some 0). as core same the has greater thus is stiffer the to PKIKP material. b) The wave energy 4 magnitude earthquake, waves the will earthquake the along page). next (map, Bend from the along focal the portraying (only) Be wave. of the each for a
Earthquake Some (“PKIKP” 5100 # (u inner the inner core under is core inner asthenosphere is through solid (“P” and "K”). is partially converted surface as compressional of 8 magnitude place. larger much first? the 8 magnitude quakes occurring simultaneously? occurs Oregon distance the offset of the ¢) Rayleigh time of arrival seismograms, and
Core about at solid is through it solid Evidence fora solid inner core.a) The inner core. earthquake a same How to pared A earthquake Bend, Time), and sense the dilatation: seismograms wave; g) mates three all
Chapter 7 Inner expected than velocity in core inner travel Fig. 7.27). The because solid the to core soft tively the “I” portion returns to the and EXERCISES An 7-1 later, the a) b) An 7-2 in a) and Love on
218 7.36 Fig. 7.28). because mantle and outer core mantle the
FIGURE the (“J"), then both in