The Experts below are selected from a list of 240 Experts worldwide ranked by ideXlab platform
Vala Hjorleifsdottir - One of the best experts on this subject based on the ideXlab platform.
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the 26 december 2004 tsunami source estimated from satellite radar altimetry and seismic waves
Geophysical Research Letters, 2005Co-Authors: Tony Y Song, Victor Zlotnicki, C K Shum, Vala HjorleifsdottirAbstract:[1] The 26 December 2004 Indian Ocean tsunami was the first earthquake tsunami of its magnitude to occur since the advent of both digital Seismometry and satellite radar altimetry. Both have independently recorded the event from different physical aspects. The seismic data has then been used to estimate the earthquake fault parameters, and a three-dimensional ocean-general-circulation-model (OGCM) coupled with the fault information has been used to simulate the satellite-observed tsunami waves. Here we show that these two datasets consistently provide the tsunami source using independent methodologies of seismic waveform inversion and ocean modeling. Cross-examining the two independent results confirms that the slip function is the most important condition controlling the tsunami strength, while the geometry and the rupture velocity of the tectonic plane determine the spatial patterns of the tsunami.
Pawel Marc - One of the best experts on this subject based on the ideXlab platform.
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SURFACE ACOUSTIC WAVE VIBRATION SENSOR AS A SEISMOMETER
Sensors and Actuators A: Physical, 1Co-Authors: Jerzy Filipiak, Pawel MarcAbstract:ABSTRACT Possibility of designing a seismometer based on the surface acoustic wave vibration sensor was reported. For the analysis of its properties, a theoretical model of the sensor transducer as a cantilever plate with a surface acoustic wave delay line, loaded with a seismic mass was developed. Description of the sensor mechanical part was simplified to the one degree of freedom damped mass-spring system. An explicit dependence of the plate geometry and material parameters, as well as the seismic mass size on the sensor frequency response was obtained. On this basis, the examples of vibration sensors with resonance frequencies useful in Seismometry were manufactured. Tests confirmed the sufficient accuracy of the model to design and analyze a seismometer with the required properties. The proposed seismometer design is quite simple and its parameters may be competitive in relation to the currently used solutions.
Tony Y Song - One of the best experts on this subject based on the ideXlab platform.
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the 26 december 2004 tsunami source estimated from satellite radar altimetry and seismic waves
Geophysical Research Letters, 2005Co-Authors: Tony Y Song, Victor Zlotnicki, C K Shum, Vala HjorleifsdottirAbstract:[1] The 26 December 2004 Indian Ocean tsunami was the first earthquake tsunami of its magnitude to occur since the advent of both digital Seismometry and satellite radar altimetry. Both have independently recorded the event from different physical aspects. The seismic data has then been used to estimate the earthquake fault parameters, and a three-dimensional ocean-general-circulation-model (OGCM) coupled with the fault information has been used to simulate the satellite-observed tsunami waves. Here we show that these two datasets consistently provide the tsunami source using independent methodologies of seismic waveform inversion and ocean modeling. Cross-examining the two independent results confirms that the slip function is the most important condition controlling the tsunami strength, while the geometry and the rupture velocity of the tectonic plane determine the spatial patterns of the tsunami.
Kiyoshi Yomogida - One of the best experts on this subject based on the ideXlab platform.
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Broadband seismic observation at the Sakurajima Volcano, Japan
Geophysical Research Letters, 1992Co-Authors: Hitoshi Kawakatsu, Takao Ohminato, Hisao Ito, Yasuto Kuwahara, Takashi Kato, Kayoko Tsuruga, Satoru Honda, Kiyoshi YomogidaAbstract:We installed a portable broadband seismometer (Streckeisen STS-2) at the Sakurajima volcano, which has been very active in the recent years. The recorded seismograms show a wide variety (both in temporal and spectral contents) of seismic events, from explosions to tremors, and exhibit the importance of such broadband Seismometry at volcanos. We present examples of seismograms to show the potential of broadband seismic observation in monitoring volcanic activities.
Jerzy Filipiak - One of the best experts on this subject based on the ideXlab platform.
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SURFACE ACOUSTIC WAVE VIBRATION SENSOR AS A SEISMOMETER
Sensors and Actuators A: Physical, 1Co-Authors: Jerzy Filipiak, Pawel MarcAbstract:ABSTRACT Possibility of designing a seismometer based on the surface acoustic wave vibration sensor was reported. For the analysis of its properties, a theoretical model of the sensor transducer as a cantilever plate with a surface acoustic wave delay line, loaded with a seismic mass was developed. Description of the sensor mechanical part was simplified to the one degree of freedom damped mass-spring system. An explicit dependence of the plate geometry and material parameters, as well as the seismic mass size on the sensor frequency response was obtained. On this basis, the examples of vibration sensors with resonance frequencies useful in Seismometry were manufactured. Tests confirmed the sufficient accuracy of the model to design and analyze a seismometer with the required properties. The proposed seismometer design is quite simple and its parameters may be competitive in relation to the currently used solutions.