Magnitude estimation using the first three seconds P-wave amplitude in earthquake early warning
نویسندگان
چکیده
منابع مشابه
Single station estimation of earthquake early warning parameters by using amplitude envelope curve
In this study, new empirical relationships to estimate key parameters in Earthquake Early Warning (EEW) system including magnitude, epicentral distance and Peak Ground Acceleration (PGA) are introduced based on features of the initial portion of P-wave’s amplitude envelope curve. For this purpose, 226 time series recorded by bore-hole accelerometers of Japanese KiK-net are processed for earthq...
متن کاملRETRACTION: Early magnitude estimation for the MW7.9 Wenchuan earthquake using progressively expanded P-wave time window
The authors wish to retract this Article because large sections of the text were copied from a Colombelli et al. study, which was cited as reference 37. The results and data presented in the Article have not been contested.
متن کاملEarly magnitude estimation for the MW7.9 Wenchuan earthquake using progressively expanded P-wave time window
More and more earthquake early warning systems (EEWS) are developed or currently being tested in many active seismic regions of the world. A well-known problem with real-time procedures is the parameter saturation, which may lead to magnitude underestimation for large earthquakes. In this paper, the method used to the MW9.0 Tohoku-Oki earthquake is explored with strong-motion records of the MW7...
متن کاملP-Wave Attenuation with Implications for Earthquake Early Warning
Several widely implemented and tested earthquake early warning algorithms employ empirical equations that relate earthquake magnitudes with groundmotion peak amplitudes and hypocentral distances. This approach is effective to the extent that the offline dataset available for setting the fitting coefficients in those equations is of sufficient quality and quantity. However, to address the proble...
متن کاملA comparison of tc and tp for magnitude estimation in earthquake early warning
[1] We determined the tc and tp parameters from the K-NET strong motion records of 16 earthquakes in Japan with moment magnitude (Mw) ranging from 6.0 to 8.3. A 0.075 Hz high-pass Butterworth filter was applied for determination of tc based on our previous studies. It was found that different pole selections of the Butterworth filter lead to different uncertainty in magnitude determination. Our...
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ژورنال
عنوان ژورنال: Geophysical Research Letters
سال: 2006
ISSN: 0094-8276
DOI: 10.1029/2006gl026871