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Earth, Planets and Space
Fig. 9 | Earth, Planets and Space

Fig. 9

From: Anatomy of phreatic eruptions

Fig. 9

Source location of HF bursts (the transparent triangles relate to a level of confidence in amplitude ratio locations, whiter shades corresponding to more probable locations whereas darker to less probable). The amplitude ratios between 5 and 15 Hz were used to estimate the most likely source locations [between 16:00 and 17:00 UTC (Fig. 8b)]. The polygon shows the most probable source location for a vertical migration whereas the arrow highlights the possible trajectory of the lateral migration

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