Ancient slabs beneath Arctic and surroundings: Izanagi, Farallon, and in-betweens

Progress in Earth and Planetary Science

Table 1 Information on the tomographic inversions for the 12 regions

Region	Center (lon, lat)	Block size	N_station (in)	N_station (total)	N_event	N_P	N_pP	N_PP	N_total
1	(0.0, 90.0)	0.1° × 5.0 km (in)	923	12,543	17,827	5,762,140	188,989	128,476	6,079,605
		1.0° × 20.0 km (out)
2	(−38.461, 90.0)	0.1° × 5.0 km (in)	1295	12,640	19,045	6,084,018	196,719	130,135	6,410,872
		1.0° × 20.0 km (out)
3	(−100.0, 60.0)	0.1° × 5.0 km (in)	4164	12,612	17,671	5,738,009	190,145	129,393	6,057,547
		1.0° × 20.0 km (out)
4	(110.0, 50.0)	0.7° × 10.0 km (in)	1183	12,485	16,033	5,623,441	183,447	122,100	5,928,988
		1.3° × 20.0 km (out)
5	(80.0, 60.0)	0.2° × 10.0 km (in)	1028	12,555	19,288	6,006,788	197,460	131,146	6,335,394
		1.0° × 20.0 km (out)
6	(−70.0, 50.0)	0.1° × 5.0 km (in)	2469	12,565	17,167	5,658,950	178,360	127,522	5,964,832
		1.0° × 20.0 km (out)
7	(−120.0, 35.0)	0.1° × 5.0 km (in)	3618	12,612	19,817	6,190,973	206,735	134,798	6,532,506
		1.0° × 20.0 km (out)
8	(−170.0, 40.0)	0.3° × 10.0 km (in)	705	12,659	19,515	6,448,371	209,746	134,384	6,792,501
		1.0° × 20.0 km (out)
9	(150.0, 35.0)	0.7° × 10.0 km (in)	1021	12,611	17,150	5,907,332	186,988	127,138	6,221,458
		1.3° × 20.0 km (out)
10	(60.0, 35.0)	0.3° × 10.0 km (in)	2307	12,551	19,120	5,974,579	198,425	131,238	6,304,242
		1.0° × 20.0 km (out)
11	(10.0, 40.0)	0.1° × 5.0 km (in)	3863	12,558	19,078	5,919,055	187,066	129,807	6,235,928
		1.0° × 20.0 km (out)
12	(−30.0, 35.0)	0.1° × 5.0 km (in)	1687	12,542	17,276	5,664,954	178,391	126,679	5,970,024
		1.0° × 20.0 km (out)

(in): inside the target volume; (out): outside the target volume; N_station: the number of stations; N_event: the number of seismic events; N_P, N_pP, and N_PP: the number of arrival times for P, pP, and PP waves; N_total: the total number of arrival times used