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A new model for the fault beneath the sedimentary basin in the 1891 Nobi earthquake

机译：1891年诺比地震中沉积盆地下方断层的新模型

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We have investigated the geometry and detailed location of the Gifu-Ichinomiya (GI) fault, a buried fault considered to have ruptured during the 1891 Nobi earthquake. Based on an inversion of coseismic vertical displacements obtained by leveling surveys, we obtain an inclined fault plane showing a reverse fault-type mechanism, rather than the vertical fault plane assumed in previous models. The fault dips 60° to the east and its slip during the earthquake is estimated to have been 1.48 m along the fault dip. The fault is located 5 km east of the location assumed in the previous models. Recent earthquakes have been scattered along the new fault location, not the previously estimated one. Focal mechanisms of the earthquakes that have occurred around the fault are dominated by a reverse fault component, which is consistent with the focal mechanism of the GI fault obtained by the inversion of coseismic displacements. The seismic intensity distribution calculated using the new fault geometry and location explains well the distribution of observed damage caused by the 1891 Nobi earthquake
机译：我们研究了岐阜一之宫（GI）断层的几何形状和详细位置，该断层被认为是在1891年Nobi地震中破裂的埋藏断层。基于通过水准测量获得的同震垂直位移的反演，我们获得了一个倾斜的断层平面，该平面显示了一种反向断层类型的机制，而不是先前模型中假定的垂直断层平面。断层向东倾斜60°，地震沿断层的滑移估计为1.48 m。断层位于先前模型假定位置以东5公里处。最近的地震散布在新的断层位置，而不是先前估计的位置。断层周围发生的地震的震源机制以逆断层成分为主，这与同震位移反演得到的GI断层的震源机制是一致的。使用新断层的几何形状和位置计算出的地震烈度分布很好地解释了1891年Nobi地震造成的观测破坏的分布

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