Table 5.

The coordinates of the first arrive time.

Sensor No.	Sensor coordinates/m			The first arrive time/s
	X	Y	Z	Event 1	Event 2	Event 3	Event 4	Event 5
1	69396.456	73659.927	1035.6	0.160	0.146	0.610	0.434	0.107
2	69245.908	73640.068	1051.4		0.178	0.642	0.468	0.141
5	70238.600	73671.700	911.20	0.198			0.468
7	69224.362	73815.770	1055.4			0.642		0.145
8	69379.560	73857.502	1026.4	0.172	0.160	0.624	0.448	0.123
9	69752.300	73617.200	1003.8	0.083	0.069	0.533	0.354	0.048
16	69950.469	73671.934	956.9	0.148	0.134	0.598	0.422	0.115