Permutation entropy variations in seismic noise before and after eruptive activity at Shinmoedake volcano, Kirishima complex, Japan

Earth, Planets and Space

Table 1 Summary of the results of the Kolmogorov–Smirnov test when applied to pairs of observation periods at all stations

Station	January 2011		October 2017		February–March 2018
Station	I–II	II–III	I–II	II–III	I–II	II–III
SMN	P < 10^–6	P < 10^–6	P < 10^–6	P = 0.12	P < 10^–6	P < 10^–6
SMN	N = 419.04	N = 242.30	N = 103.11	N = 114.51	N = 346.08	N = 367.33
SMW	P < 10^–6	P < 10^–6	P < 10^–6	P < 10^–6	P < 10^–6	P < 10^–6
SMW	N = 419.04	N = 242.30	N = 103.11	N = 114.51	N = 346.08	N = 367.33
KIOH	P < 10^–6	P < 10^–6	–	–	–	–
KIOH	N = 419.04	N = 242.30	–	–	–	–
SMET	–	–	P < 10^–6	P < 10^–6	P < 10^–6	P < 10^–6
SMET	–	–	N = 103.11	N = 114.51	N = 346.08	N = 367.33
KRS	P < 10^–6	P < 10^–6	P < 10^–6	P < 10^–6	P < 10^–6	P < 10^–6
KRS	N = 419.04	N = 242.30	N = 103.11	N = 114.51	N = 346.08	N = 367.33
TKS	P < 10^–6	P < 10^–6	P < 10^–6	P < 10^–6	P < 10^–6	P < 10^–6
TKS	N = 419.04	N = 242.30	N = 103.11	N = 114.51	N = 346.08	N = 367.33

Each pair of periods contains the corresponding p-value and the metric N that should be larger than 4 in order for the test results to be reliable. Empty spaces denoted “–” for stations SMET and KIOH signify lack of data during January 2011 and October 2017, February–March 2018, respectively