Fig. 6
From: Shallow pressure sources associated with the 2007 and 2014 phreatic eruptions of Mt. Ontake, Japan
Observed and calculated horizontal displacements of observation stations referred to JMA510 and positions of estimated pressure sources (Sphere2) based on GNSS campaign data from August 2005 and September 2007. Vector of observation shows the difference between the average coordinate from August 16–19, 2005, and the average coordinate from September 18–21, 2007. Ellipses show observation errors based on the standard deviation of daily coordinates during the observation period. The displacement pattern with addition of the shift of JMA510 is shown for easier understanding. Light red symbols (Sphere1 and Fault) show pressure sources estimated in Fig. 5b. Light blue dots near the summit show vents generated by the 1979 eruption