An investigation of changes to commercial aircraft flight paths during volcanic eruptions

Table 5 Summary of flight information for the different heightened eruptive activities

Volcano	Etna		Sakurajima		Marapi		Sheveluch		Klyuchevskoy		Ubinas		Total
Volcano	Raw No.	%	Raw No.	%	Raw No.	%	Raw No.	%	Raw No.	%	Raw No.	%	Raw No.	%
No. Flights	61		58		23		19		16		6		183
Entering polygon	1	0	0	0	0	0	0	0	0	0	0	0	1	0.5
No noticeable deviation	51	83	58	100	23	100	3	16	1	6	6	100	142	78
Noticeable deviation	10	16	0	0	0	0	16	84	15	94	0	0	41	22
Cancellations	14	-	0	0	0	0	0	0	0	0	0	0	14	-
Flights diverted to another airport	10	16	0	0	0	0	0	0	1	6	0	0	11	6
Delay 15–30 min	4	7	Unknown		5	22	Unknown		1	6	0	0	10	5
Delay 30 + mins	11	18	Unknown		7	30	Unknown		9	56	1	17	28	15
Delay Total	15	25	3	5	12	52	11	58	10	63	1	17	52	28

ISSN: 2191-5040