目前深层横波震源技术尚不成熟，大量的多波技术研究仍然是针对转换波。
At present, the deep shear wave source technique is still in juvenility, major multiwave technical studies are directed against transformed waves.
已有的研究表明，炸药震源在井下激发、可控震源在地面垂向振动，均会产生较强的纯纵波和一定强度的纯横波；泊松比差别较大的分界面有利于形成较强的透射转换横波。
Previous studies show that both dynamite borehole shots and vertical vibrations from controllable seismic sources at the surface will produce relatively strong pure P-waves and weaker pure S-waves.
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