At first, we investigate on the physical mechanisms responsible for for long-term interactions. It has been argued that postseismic relaxation field might be responsible of such long-term interactions; then, our first task is understand whether or not the postseismic stress field can produce not negligible perturbations (respect to the tectonic field) and lead to long-term variations on a seismogenetic system. The second task of this work is to systematically investigate on the effects of long-term interactions in the seismic data. In particular, we focus our attention on the perturbation induced by the greatest earthquakes of the last century, all occurred in the period 1952-1965. At global scale, we study the distribution of strong earthquakes (M ≥ 7.0), and specifically we try to understand whether spatial and temporal distribution of M ≥ 7.0 earthquakes occurred after 1965 is correlated with the perturbation due to the 5 giant earthquakes Kamchatka 1952, Aleutins 1957, Chile 1960, Alaska 1964, and Aleutins 1965. At local scale, we aim to understand the effects of long-term interactions on moderate seismicity. In particular, we study the effects of the two strongest event of the past century (Chile 1960 and Alaska 1964) in Southern California, where is available a catalog (complete with focal parameters estimation) for moderate seismicity (M ≥ 4.7) since 1933. Finally, we study the effects of long-term stress perturbations on volcanic systems. The interaction between strong tectonic earthquakes and volcanic eruptions has been found through various statistical analysis of catalogs [e.g., Linde and Sacks, 1998; Marzocchi, 2002; Marzocchi et al., 2002]. Anyway, some authors remain skeptical because of the retrospective approach used in those works. Therefore, here we aim to set an objective tool to accomplish a forward test to quantitatively analyze such a long-term interaction among earthquakes and volcanoes.
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机译：首先，我们研究负责长期相互作用的物理机制。有人认为，地震后的松弛场可能是这种长期相互作用的原因。然后，我们的首要任务是了解地震后应力场是否会产生不可忽略的扰动（相对于构造场），并导致地震发生系统发生长期变化。这项工作的第二个任务是系统地研究地震数据中长期相互作用的影响。特别是，我们将注意力集中在上个世纪最大的地震引起的扰动上，这些扰动都发生在1952-1965年期间。在全球范围内，我们研究了强地震（M≥7.0）的分布，特别是试图了解1965年以后发生的M≥7.0地震的时空分布是否与5952年堪察加大地震引起的扰动有关， Aleutins 1957，智利1960，Alaska 1964和Aleutins1965。在本地范围内，我们旨在了解长期相互作用对中等地震活动的影响。特别是，我们研究了上世纪两个最强烈事件（智利1960年和阿拉斯加1964年）在南加州的影响，该目录提供了自1933年以来中等地震（M≥4.7）的目录（完整的震源参数估计）。最后，我们研究了长期应力扰动对火山系统的影响。通过对目录的各种统计分析发现了强烈的构造地震和火山喷发之间的相互作用[e.g.，Linde and Sacks，1998; Marzocchi，2002； Marzocchi等，2002]。无论如何，由于这些作品中使用了追溯性方法，一些作者仍然对此表示怀疑。因此，在这里，我们旨在设置一个客观的工具，以完成对地震和火山之间这种长期相互作用进行定量分析的正向测试。
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