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

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

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