The Santorini-Amorgos zone is located in the central part of the Hellenic volcanic arc and is hosting eight large faults as well as Kolumbo and Santorini volcanic centers. The largest earthquake (M_w ~ 7.1) in the southern Aegean during the 20th century also occurred in this area on 9 July 1956. A total of 1868 crustal events were recorded by temporary networks during September 2002 to July 2004 and October 2005 to March 2007, and also by the permanent network from 2011 to 2019. We relocated 1455 of these events by using HypoDD and revealed clusters of earthquakes beneath Kolumbo, Anydros graben, and Santorini-Amorgos ridge. Only the faults in the SW of Anydros, SE of Ios, and along the south coast of Amorgos were delineated by the relocated events. Nearly vertical clusters were observed beneath the island of Anydros, south of Amorgos, and in NE end of Amorgos fault, indicating possible pathways of upward migrating fluids. The seismogenic layer thickness calculated based on the depth distribution of the relocated events was 12.5 km. We combined this thickness with geometrical properties of the faults to calculate the expected moment magnitude of future earthquakes, resulting in a range of 6.3–7.2. In an effort to map the distribution of fluids, the Vp/Vs ratio distribution was estimated by utilizing the event-station travel time data along with crack density, fluid saturation, and Poisson's ratio. The petrophysical parameters observed in the northern part of the Santorini caldera suggest the existence of melt, while those observed in Anydros and in the NE of Amorgos fault support the suggestion of upward migrating fluids in these areas.

Santorini-Amorgos区位于希腊火山弧的中部，拥有8个大型断层以及Kolumbo和Santorini火山中心。最大的地震（M _{w ^} 〜7.1）在20世纪的爱琴海南部也发生于1956年7月9日。2002年9月至2004年7月以及2005年10月至2007年3月，临时性网络记录了1868次地壳事件，永久性记录了该事件。网络从2011年到2019年。我们通过使用HypoDD重新定位了1455个此类事件，并揭示了在哥伦布，Anydros劫掠和圣托里尼-阿莫尔戈斯山脊下的地震群。迁移事件仅描绘了安德罗斯西南部，伊奥斯东南部以及阿莫戈斯南部沿海的断层。在Amorgos南部的Anydros岛下方和Amorgos断层的NE端观察到近乎垂直的星团，这表明向上迁移的流体可能是途径。根据重定位事件的深度分布计算的地震层厚度为12.5 km。我们将此厚度与断层的几何特性相结合，以计算未来地震的预期矩震级，其范围为6.3–7.2。为了绘制出流体的分布图，通过利用事件站的行程时间数据以及裂缝密度，流体饱和度和泊松比来估算Vp / Vs比率分布。在圣托里尼火山口北部观察到的岩石物性参数表明存在熔体，而在安德罗斯和阿莫尔戈斯断层东北部观察到的岩石参数支持了这些地区流体向上迁移的建议。Vp / Vs比率分布是通过利用事件台旅行时间数据以及裂纹密度，流体饱和度和泊松比来估算的。在圣托里尼火山口北部观察到的岩石物性参数表明存在熔体，而在安德罗斯和阿莫尔戈斯断层东北部观察到的岩石参数支持了这些地区流体向上迁移的建议。Vp / Vs比率分布是通过利用事件台旅行时间数据以及裂纹密度，流体饱和度和泊松比来估算的。在圣托里尼火山口北部观察到的岩石物性参数表明存在熔体，而在安德罗斯和阿莫尔戈斯断层东北部观察到的岩石参数支持了这些地区流体向上迁移的建议。