Seismic tomography has provided key insight into Yellowstone’s crustal magmatic system that includes attempts to understand the melt distribution in the subsurface and the current stage of the volcano’s life cycle. We present new tomographic images of the shear wave speed of the Yellowstone magmatic system based on full waveform inversion of ambient noise correlations, which illuminates shear wave speed reductions of greater than 30% associated with Yellowstone’s silicic magma reservoir. The slowest seismic wave speeds (shear wave speed less than 2.3 kilometers per second) are present at depths between 3 and 8 kilometers, overlapping with petrological estimates of the assembly depth of erupted rhyolite bodies. Assuming that Yellowstone’s magmatic system is a crystal mush with broadly distributed melt, we estimate a partial melt fraction of 16 to 20%.

中文翻译：

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黄石火山口下方先前流纹岩储存深度的岩浆堆积

地震层析成像提供了对黄石地壳岩浆系统的重要洞察力，包括试图了解地表下的熔体分布和火山生命周期的当前阶段。我们基于环境噪声相关性的全波形反演，展示了黄石岩浆系统剪切波速度的新层析图像，这表明与黄石硅质岩浆储层相关的剪切波速度降低超过 30%。最慢的地震波速度（剪切波速度小于每秒 2.3 公里）出现在 3 到 8 公里的深度，与喷发流纹岩体聚集深度的岩石学估计重叠。假设黄石国家公园的岩浆系统是一种具有广泛分布熔体的水晶糊状物，