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On the change of 3He/4He ratios in hot spring gases after The Iwate-Miyagi Nairiku Earthquake in 2008
helium isotopes noble gas earthquake epicenter Japan
2017/8/10
The Iwate-Miyagi Nairiku Earthquake in 2008 (M7.2) occurred on June 14th 2008 in the northeastern Japan, Iwate Prefecture. We collected water and gas samples in hot springs from seven localities aroun...
Geographical distribution of 3He/4He ratios and seismic tomography in Japan
helium isotopes seismic tomography Japanese islands geotectonics arc magma
2017/8/10
he 3He/4He ratios (Ra) of natural gas, volcanic fluid, and groundwater are compiled in the Japanese Islands and their geographical distributions are discussed in the tectonic frame work of subduction ...