Upper mantle of the Bohemian Massif (Central Europe) studied by surface waves from Kurile Islands M8.1 and M8.3 earthquakes Petr Kolinsky Jiri Malek Institute of Rock Structure and Mechanics Academy of Sciences of the Czech Republic AGU 2007 Fall Meeting December 10 – 14 San Francisco, CA, USA
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Upper mantle of the Bohemian Massif (Central Europe) studied by surface waves from Kurile Islands M8.1 and M8.3 earthquakes Petr Kolinsky Jiri Malek Institute.
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Upper mantle of the Bohemian Massif (Central Europe) studied by surface waves from
Kurile Islands M8.1 and M8.3 earthquakes
Petr Kolinsky
Jiri MalekInstitute of Rock Structure and Mechanics
Academy of Sciences of the Czech Republic
AGU 2007 Fall MeetingDecember 10 – 14
San Francisco, CA, USA
Kolinsky and Malek: Upper mantle of the Bohemian Massif 2
contents
motivation
data
surface waveanalysis
polarization
phasevelocity
dispersioncurves
structure
conclusion
contents
motivation
data
surface wave analysis
polarization
phase velocity
dispersion curves
structure
conclusion
Kolinsky and Malek: Upper mantle of the Bohemian Massif 3
contents
motivation
data
surface waveanalysis
polarization
phasevelocity
dispersioncurves
structure
conclusion
motivation- structural: Bohemian Massif
- former project on crustal velocity estimation 9 – 36 s, 40 km depth- can we look at the deeper structure of the same region?
area of inverted S -w ave velocities average S-wave ve locity
a b
average of d isp. curv. estim ated by the freq.-tim e analysisd isp. curv. corresponding to inverted S -w ave ve locityd isp. curv. corresponding to the average S-w ave ve locity
KH CNKC
TBRKH U
phas
e ve
loci
ty (
km/s
)
10 20 30 40 506070
per iod (s)
3 .0
3.4
3.8
4.2
4.6
5.010 20 30 40 506070
phase velocity (km/s)
10 20 30 40 506070
10 20 30 40 506070
per iod (s)
2.5 3.0 3.5 4.0 4.5 5.0 5.5
50
45
40
35
30
25
20
15
10
5
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
S-w ave velocity (km /s)
2.5 3.0 3.5 4.0 4.5 5.0 5.5
S-w ave veloc ity (km /s)
50
45
40
35
30
25
20
15
10
5
0
50
45
40
35
30
25
20
15
10
5
0
de
pth
(km
) depth
(km)
2 .5 3.0 3.5 4.0 4.5 5.0 5.5
halfspace
halfspace
Kolinsky and Malek: Upper mantle of the Bohemian Massif 4