"Helium spots," where a significant amount of helium is present in the soil [up to 350 parts per million with a high (3)He to (4)He ratio of (8.90 +/- 0.31) x 10(-6)], have been found along the fault zone formed by the 1966 Matsushiro swarm earthquakes. The formation of the "helium spots" and the occurrence of the earthquakes are interpreted as the results of a diapiric uprise of a magma approximately 1 kilometer in diameter.
No takes yet. Share an insight, caveat, or question.
Wakita et al. (1978) studied this question.
Synapse has enriched 4 closely related papers on similar clinical questions. Consider them for comparative context: