Temporal variations in discharge rate and component characteristics of tephra-fall deposits during the 2014–2015 eruption of Nakadake first crater, Aso Volcano, Japan

Earth, Planets and Space

Table 1 Mass of tephra discharged during the November 2014–May 2015 activity of Nakadake first crater

Period	Sampling interval (days)	Total discharged mass (× 10⁴ ton)	Discharge rate (× 10⁴ ton/day)
Nov 25–29, 2014	4	14.9	3.7
Nov 29–Dec 2, 2014	3	6.6	2.2
Dec 2–8, 2014	6	1.9	0.3
Dec 8–9, 2014	1	2.9	2.9
Dec 9–11, 2014	2	7.0	3.5
Dec 11–15, 2014	4	8.4	2.1
Dec 15–17, 2014	2	4.4	2.2
Dec 17–23, 2014	6	6.0	1.0
Dec 23, 2014–Jan 7, 2015	15	38.9	2.6
Jan 7–13, 2015	6	14.3	2.4
Jan 13–20, 2015	7	18.4	2.6
Jan 20–29, 2015	9	19.1	2.1
Jan 29–Feb 2, 2015	4	8.1	2.0
Feb 2–9, 2015	7	6.9	1.0
Feb 9–16, 2015	7	3.3	0.5
Feb 16–25, 2015	9	2.7	0.3
Feb 25–Mar 2, 2015	5	3.6	0.7
Mar 2–9, 2015	7	7.1	1.0
Mar 9–17, 2015	8	5.6	0.7
Mar 17–23, 2015	6	6.6	1.1
Mar 23–31, 2015	8	1.8	0.2
Mar 31–Apr 15, 2015	15	2.5	0.2
Apr 15–21, 2015	6	1.2	0.2
Apr 21–27, 2015	6	8.9	1.5
Apr 27-May 4, 2015	7	10.1	1.4
May 4–11, 2015	7	0.6	0.1
May 11–19, 2015	8	1.4	0.2
May 19–25, 2015	6	0.3	0.0