从1978年11月开始.协田宏(日)等人在日本西南部,沿山崎活断层进行了一系列现场试验,观测土壤气中氢气、甲烷、二氧化碳和分子氢的氘氢比。在沿断层的土壤气中观测到了超过3％(体积百分比)的相当大量的(30000ppm)氢气;而远离断层带的土壤气中的氢浓度大约为0.5ppm,几乎与空气中氢的含量一 Beginning in November 1978, Katsuhiro Akira et al conducted a series of field experiments along the Yamasaki active fault in southwestern Japan to observe the deuterium hydrogen ratio of hydrogen, methane, carbon dioxide and molecular hydrogen in soil gas. A significant amount of (30000 ppm) hydrogen was observed in the soil gas along the fault over 3% (volume percent); and the hydrogen concentration in the soil gas away from the fault zone was about 0.5 ppm, almost in proportion to the hydrogen content in the air