Abstract

Studies in archeoseismology were conducted in the Ferghana Valley revealing traces of strong earthquakes that occurred in ancient times. We pointed out in our previous publications that the ancient city of Eilatan perished in the 1st century BC when devastated by a strong earthquake. It was during that time that the capital Farghana (Akhsiket) was damaged. We also detected there a seismic rupture at the surface and other evident deformations in the previous structural elements. We determined the magnitude of the seismic disaster (М = 7.6) based on the greatest displacement on the seismogenic rupture emerging at the surface right in the middle of the ancient city. The associated seismic motion completely destroyed or considerably deformed all structures and seriously damaged and destroyed the city walls. It was probably for that reason that the new kings of the Ferghana Valley built a new residence for themselves on Mugtepe after the 90s BC. The site is referred to in a Chinese source Hanshu as Guishuan. We have succeeded to determine from data to be found in archeological sources that the abovementioned fortifications in the capital were built in the time span 104–90 BC, while the intensity X earthquake itself seems to have occurred approximately in 91–90 BC. The earthquake involved all of the Ferghana Valley, hitting the towns and villages in the northern Ferghana especially heavily. A conspicuous example is furnished by the falling-apart of massive fortress walls in the citadel and the Shahristan of the town of Farghana (Ahsiket). It is possible that the seismogenic rupturing that emerged at the surface in the ancient Ahsiket and Eilatan occurred at the same time. A similar strong earthquake occurred later on, during the 11th to the earlier half of the 12th century. We identified traces of this seismic event at several objects of the Karahanid age in the shakhristan and rabad. These materials must be incorporated for a new assessment of earthquake hazard for the Ferghana Basin.

中文翻译：

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费尔干纳谷古都阿西克特强震痕迹

摘要

在费尔干纳山谷进行的考古地震学研究揭示了古代发生的强烈地震的痕迹。我们在之前的出版物中指出，埃拉坦古城在公元前 1 世纪被强烈地震摧毁而毁灭。正是在此期间，首都法尔加纳（Akhsiket）遭到破坏。我们还检测到地表有地震破裂和先前结构元件的其他明显变形。我们确定了地震灾害的震级（М= 7.6）基于在古城正中央地表出现的地震破裂的最大位移。相关的地震运动完全破坏或使所有结构严重变形，并严重损坏和摧毁了城墙。大概也正是因为这个原因，公元前90年代以后，费尔干纳谷的新国王们在穆格泰佩为自己建造了一座新居。该网站在中文来源汉书中引用如贵栓。我们已经从考古资料中成功地确定了首都的上述防御工事建于公元前104-90年的时间跨度，而强度X地震本身似乎大约发生在公元前91-90年。地震波及整个费尔干纳河谷，对费尔干纳北部城镇和村庄的打击尤为严重。一个显着的例子是城堡中巨大的堡垒墙和 Farghana (Ahsiket) 镇的 Shahristan 倒塌。古Ahsiket 和Eilatan 地表出现的地震破裂可能同时发生。后来发生了类似的强烈地震，在 11 世纪到 12 世纪上半叶。我们在 shakhristan 和 rabad 的几个 Karahanid 时代的物体上确定了这次地震事件的痕迹。这些材料必须纳入费尔干纳盆地的新地震危险评估。