Rescaled earthquake recurrence time statistics: application to microrepeaters
Rescaled earthquake recurrence time statistics: application to microrepeaters
复制标题
重新调整的地震复发时间统计：在微中继器中的应用
DOI：
10.1111/j.1365-246x.2008.03999.x
复制
发表时间：
2009
影响因子：
2.8
通讯作者：
T. Matsuzawa
中科院分区：
文献类型：
--
作者：
C. Goltz;D. Turcotte;S. Abaimov;R. Nadeau;N. Uchida;T. Matsuzawa
主要断层上的滑动主要发生在“特征”地震期间。特征地震的重现性统计在地震危险性评估中占有重要地位。确定适用统计数据的一个主要问题是全球范围内可获得的特征地震的短序列。在本文中，我们介绍了一种重新缩放技术，其中可以叠加序列以建立更多的数据点。我们考虑了威布尔分布和对数正态分布，在这两种情况下，我们都使用平均值和标准差来重新调整数据。我们利用微重复序列来测试我们的方法，微重复序列是指在断层的同一位置重复发生的微地震。将这些地震视为经典特征地震的缩影似乎是合理的。微小重复器比大地震频繁得多，导致用于分析的序列更长。在本文中，我们给出了几个来自加州帕克菲尔德和日本东北部的微中继器序列的重复时间分析结果。我们发现，一旦相应的序列被认为具有足够的平稳性，则统计数据可以很好地服从威布尔分布或对数正态分布。我们通过重新调整组合的技术清楚地证明了这一事实。我们得出的结论是，我们所考虑的微中继器序列的重复统计量类似于主要断层上特征地震的重复统计量。
Slip on major faults primarily occurs during 'characteristic' earthquakes. The recurrence statistics of characteristic earthquakes play an important role in seismic hazard assessment. A major problem in determining applicable statistics is the short sequences of characteristic earthquakes that are available worldwide. In this paper, we introduce a rescaling technique in which sequences can be superimposed to establish larger numbers of data points. We consider the Weibull and log-normal distributions, in both cases we rescale the data using means and standard deviations. We test our approach utilizing sequences of microrepeaters, microearthquakes which recur in the same location on a fault. It seems plausible to regard these earthquakes as a miniature version of the classic characteristic earthquakes. Microrepeaters are much more frequent than major earthquakes, leading to longer sequences for analysis. In this paper, we present results for the analysis of recurrence times for several microrepeater sequences from Parkfield, CA as well as NE Japan. We find that, once the respective sequence can be considered to be of sufficient stationarity, the statistics can be well fitted by either a Weibull or a log- normal distribution. We clearly demonstrate this fact by our technique of rescaled combination. We conclude that the recurrence statistics of the microrepeater sequences we consider are similar to the recurrence statistics of characteristic earthquakes on major faults.
2005 年宫城大地震 (M7.2) 周围的小规模重复地震和板间蠕变
DOI：
--
发表时间：
2006
期刊：
Earth Planets Space 58 (12)
影响因子：
--
作者：
Ucnida;N.;T.Matsuzawa;S.Hirahara;A.Hasegawa
通讯作者：
A.Hasegawa