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Titel |
A Robust Scheme for the Global Earthquake Early Warning Based on Characteristic Frequency |
VerfasserIn |
Yu-Chang Wu, Ling-Yun Chiao, Cheng-Ju Wu |
Konferenz |
EGU General Assembly 2017
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Medientyp |
Artikel
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Sprache |
en
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Digitales Dokument |
PDF |
Erschienen |
In: GRA - Volume 19 (2017) |
Datensatznummer |
250141646
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Publikation (Nr.) |
EGU/EGU2017-5179.pdf |
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Zusammenfassung |
Earthquake hazards mitigation have always been an important issue. Prompt and rapid high
precision magnitude estimation is essential to achieve the goal of effective early warning.
However, the current state of the method including the maximum predominant period
(τpmax), the vertical displacement of P-wave (Pd), and the τc × Pdmethod has reached a
standstill for nearly a decade. The major shortcoming is that these methods are
not quite applicable for large earthquakes (M>7). Therefore, a new magnitude
estimation method for earthquake early warning is crucial and is needed for human
preventing loss and casualties in the large earthquakes. Here we demonstrate a robust
scheme based on the characteristic frequency. Our result shows a linear relation
between the momentum magnitude and the characteristic frequency of P-wave which
appears within the first few seconds. This method requires fewer calculations and
doesn’t need to apply any filter to obtain better results, so the data processing time
needed for the real-time earthquake early warning system is greatly reduced. This
method also indicates strong applicability for estimating earthquakes with magnitude
larger than 7. We demonstrate a robust scheme of global earthquake early warning. |
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