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251
Bull. Earthq. Res. Inst.
Univ. Tokyo
Vol. pp.
* email : f [email protected]
JGI Inc.
Earthquake Research Institute, the University of Tokyo
Technology for imaging the lithospheric structure using earthquakes, such as receiver func-
tions and seismic interferometry, have advanced greatly in the last decade. Three component, low
cost accelerometer sensors have been constructed using Micro Electro Mechanical System (MEMS)
technology, and are providing new opportunities for earthquake observations. To evaluate the fea-
sibility of MEMS sensors for earthquake observations, dense seismic array observations were
carried out using MEMS sensors in Mizusawa district, northern Honshu, Japan, for three months in
. In comparison with observed seismograms of velocity sensors, MEMS sensors show high
performance for local and regional earthquakes. However, due to high-noise levels from the sensor
itself at lower frequencies, MEMS sensors are not adequate for recording teleseismic waves.
: MEMS sensor, earthquake observations, imaging of lithosphere
MEMS
Wilson
and Aster, ; Ruigrok
;
Wu :
MEMS
Abe MEMS
MEMS Micro Electro Mechanical System
*
Fumitoshi Murakami *, Hiroshi Sato , Toru Kuroda , Susumu Abe and Naoko Kato
et al.,
et al.,
et al.,
Abstract
Key words
MEMS
Evaluation of MEMS Accelerometer Sensor for Earth-
quake Observations
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Fig. . Block diagram and electrical connections of analog-output type MEMS accelerometer
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Table . Main specifications of MEMS accelerometer sensors.
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Table . Basic specification of the recording system employed with digital-output type MEMS accelerometer sensor.
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Fig. . Configuration of earthquake observation system employed with digital-output type
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Fig. . Comparison of observed waveforms of impulsive seismic source by analog-output type and digital-output
type MEMS accelerometer sensors. Right-hand side shows figures of spectrum comparison (top), amplitude ratio
(middle), phase di erence (bottom).
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Fig. . Observed waveform of vibrator sweep seismic source by analog-output type MEMS accelerometer
sensor. Sweep frequency : Hz, Sweep length : sec., Taper length : . sec.
Fig. . Observed waveform of vibrator sweep seismic source by digital-output type MEMS accelerometer
sensor. Sweep frequency : Hz, Sweep length : sec., Taper length : . sec.
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meter sensor.
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Table . Combination of various profiling method. Table shows profiling methods, which
employ controlled seismic source and natural earthquake data, and corresponding resultant
subsurface profile and related seismic sensors.
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sensors : Some issues for consideration,
system, NE Japan, ,
Ruigrok, E., D. Draganov and K. Wapenaar, , Global-scale
seismic interferometry : theory and numerical examples,
Shragge, J., Artman, B. and Wilson, C., , Teleseismic shot-
Colibrys Ltd., , Product Description, Company Brochure.
, , .
.
Kato, N., Sato, H. and Umino, N., , Fault reactivation and
active tectonics on the fore-arc side of the back-arc rift
.
MEMS
No. .
, , doi : . /j. - . .
.
Sercel Inc., , Digital sensor unit C DSU/ XL, Com-
pany Brochure.
profile migration, , SI .
Wilson, D. and R. Aster, , Seismic imaging of the crust
and upper mantle using regularized joint receiver func-
tions, frequency-wave number filtering, and multimode
Kirchho migration, , B , doi :S -P .
. / JB .Abe, S., Kurashimo, E., Sato, H., Hirata, N., Iwasaki, T. and
Wu, F., Okaya, D., Sato, H. and Hirata, N., , InteractionKawanaka, T., , Interferometric seismic imaging
between two subducting plates under Tokyo and itsof crustal structure using scattered teleseismic waves,
possible e ects on seismic hazards,, No. , L , doi : . /
, L , doi : . / GL .GL .
, Buyers’ Guide NikkeiPS
Electronics, ..
(Received January , )
(Accepted March , )Gibson, J., Burnett, R., Ronen, S. and Watt, H., , MEMS
MEMS Hz The Leading Edge,
Journal of Structural Geology,
Geophy. Prosp.,
Geophysics,
J. Geophys. Res.,
Geophys. Res. Lett.,Geophys. Res. Lett.,
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