Investigation of the Earthquake Prediction by the observation of Groundwater Radon Concentration at the Kamioka Mine, Gifu Prefecture

Gifu的优点位于日本的中部，有许多有效的错误。我们在20个小时内进行了无线电浓度、水流速率和水温的连续监测。我们在Wariishi Hot Spring， Kamioka， Gifu Prefecture观察到了地面水域。我们通过使用地质方法来澄清水流量的变化和地震的发生率之间的关系。Wariishi热弹簧的平均水平是2.54 Bq/l，采用一种液体闪烁方法。这是显而易见的，从使用BAYTAP-G对水流动率的分析中得出的，即Wariishi春季的水流动率主要是由地球潮汐引起的。由于Wariishi在春季8小时前在Nagano和Gifu边界的地震系列中下降了大约1度的水位。在Wariishi炎热的春天，那里的水温上升约为1.5度，水流速率每分钟增加79升，每分钟增加57升，之后，在希达地区地震的强度达到5.4。强度M与从epicenter的距离Δ有关。作为水流速率变化的结果，当三次地震发生时，每个地震都有超过6.6的强度，而这个地震发生时，就产生了相等性Mc ≥ 2.3 log Δ +1.5箭头。Consequently the analysis of water flow rate demonstrated that the phase of KイD21イD2，DイD21イD2 and KイD21イD2 changed after this earthquake。

Gifu prefecture is located in the middle of Japan, and there are many active faults. We have carried out continuous monitoring of radon concentration, water flow rate, water temperature at 20 wells. We observed groundwater at the Wariishi hot spring, Kamioka, Gifu Prefecture. We made clear the relationship between the change of groundwater flow and the occurrence of earthquakes by using geological method. The average of radon concentration of the Wariishi hot spring was 2.54Bq/l with a liquid scintillation method. It is obvious from the analysis of the water flow rate using the BAYTAP-G that the water flow rate at the Wariishi hot spring has periodic fluctuations mainly induced by the Earth's tides. The water temperature went down by about 1 degree at the Wariishi hot spring eight hours before the series of earthquakes at the Nagano and Gifu boundary. And there was co-seismic phenomena at the Wariishi hot spring, where the water temperature went up about 1.5degrees, and the water flow rate increased by 79 liters per minute, from 57 liters per minute, after the Hida region Earthquake which had a magnitude of 5.4. The magnitude M is related to the distance Δ from the epicenter. As a result of the change of the water flow rate, when the three earthquakes, each of which had a magnitude of more than 6.6, and this earthquke occurred, the equality Mc ≧ 2.3log Δ +1.5 arose. Consequently the analysis of water flow rate demonstrated that the phase of KィイD21ィエD2, amplitude of OィイD21ィエD2 and KィイD21ィエD2 changed after this earthquake.