| Statistical analysis on energy field of seismicity in Ningxia and its neighborhood region |
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| 引用本文： | 杨明芝,赵卫明. Statistical analysis on energy field of seismicity in Ningxia and its neighborhood region[J]. 地震学报(英文版), 2004, 17(5): 571-577. DOI: 10.1007/s11589-004-0039-8 |
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| 作者姓名： | 杨明芝 赵卫明 |
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| 作者单位： | Earthquake Administration of Ningxia Hui Autonomous Region，Yinchuan 750001，China，Earthquake Administration of Ningxia Hui Autonomous Region，Yinchuan 750001，China |
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| 摘 要： | IntroductionOneofnotablefeaturesofseismicityistherandomoccurrenceofearthquakesinspaceandtime.Oneessentialelementofseismicityisthatearthquakereleasedenergycanbetakenastherandomfunctionsofspatialandtemporalcoordinates.Therandomfunctioncanbecalledseismicityenergystochasticfieldorearthquakeenergyfield.Sincetheseismicityisrelatedinspaceandtime,usingtheconceptofstochasticfield,thetotalfeatureofregionalseismicactivitycanbeconsidered,ratherthanthestatisticsofasingleearthquakeinthepast.Therefore,thefe…
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| 收稿时间： | 2003-05-26 |
| 修稿时间： | 2004-01-29 |
Statistical analysis on energy field of seismicity in Ningxia and its neighborhood region |
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| Yang Ming-zhi and Zhao Wei-ming. Statistical analysis on energy field of seismicity in Ningxia and its neighborhood region[J]. Acta Seismologica Sinica(English Edition), 2004, 17(5): 571-577. DOI: 10.1007/s11589-004-0039-8 |
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| Authors: | Yang Ming-zhi and Zhao Wei-ming |
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| Affiliation: | Earthquake Administration of Ningxia Hui Autonomous Region,Yinchuan,750001,China |
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| Abstract: | The random function theory is used in the paper. Taking the regional seismicity energy as the random function of space and time, the features of small seismicity field in Ningxia and its neighborhood region are studied by the analytical method of natural orthogonal function expansion. The chief part of the field, i.e., the temporal changes of time weight coefficients of first several typical fields is analyzed. We have found that their values had upward and downward changes of a large amplitude before moderate-strong earthquakes and showed variation features correlating to moderate-strong earthquakes occurred in the region and its surrounding areas. From the earthquake examples in Ningxia region, we can make the conclusion that the method of natural orthogonal function expansion of earthquake energy stochastic field is an earthquake analysis and prediction method that is worth further exploration. |
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| Keywords: | earthquake energy field natural orthogonal expansion prediction method |
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