Figure 4
From: Instant snapshot of the internal structure of Unzen lava dome, Japan with airborne muography
Muon transmission rate as a function of azimuth angle.
The values are plotted for different elevation angle ranges ((a) 60 ± 3°, (b) 53 ± 4°, (c) 41 ± 8°, and (d) 24 ± 12°). Error bars represent 1 s.d. of statistical uncertainty (1 s.e.). Theoretical transmission rates (dotted lines) are also plotted by assuming various uniform densities of the lava dome. The numbers indicate the assumed density values.
