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This paper studies the case of the methane release of the Okhotsk Sea slope, It is made a large scale acoustic sweep focusing on the east slope of Sakhalin Island based self-developed software SONIC. Detecting and judging the location of undersea methane gas leaks (GF),reisen and seabed, surveying morphological changes of methane release point with collecting the echo signal and visualization fuctions of SONIC software. By the use of GPS system for real-time tracking and positioning, it is successfully collected core samples of gas hydrate in various area with gravity sampler and other sampling tool. The samples were analyzed in time, evaluated the amount of methane emission and depositing in the area and other kinds of data, provided useful information to analyze the causes of this region's gas hydrate depositing and mining.

Methane release analysis on gas hydrate at the Okhotsk Sea slope based on SONIC technology