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Fig. 4. | Earth, Planets and Space

Fig. 4.

From: Subtle changes in strain prior to sub-Plinian eruptions recorded by vault-housed extensometers during the 2011 activity at Shinmoe-dake, Kirishima volcano, Japan

Fig. 4.

Geometrical relationship between the principal strain axes (thick lines) at ISA determined for the first sub-Plinian eruption on 26 January, 2011, and the location of Shinmoe-dake crater. Arrows show the direction (i.e. compression or depression) in each direction. Thin lines show the range of the estimation error. Open circles with text labels (Source G, Source U, and Source N) indicate the horizontal locations of deflation point sources during the sub-Plinian and the magma effusion event estimated by GSI (2011), Ueda et al. (2013), and Nakao et al. (2013), respectively.

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