Double seismic zone and seismicity in the mantle wedge beneath the Ogasawara Islands identified by an ocean bottom seismometer observation

Nakata, Kenji; Kobayashi, Akio; Katsumata, Akio; Hirose, Fuyuki; Nishimiya, Takahito; Kimura, Kazuhiro; Tsushima, Hiroaki; Maeda, Kenji; Baba, Hisatoshi; Hanamura, Noritaka; Yamada, Chisato; Kanezashi, Masashi

doi:10.1186/s40623-019-1012-z

Earth, Planets and Space

Table 2 Comparison between SBJ hypocenters and those of this study

From: Double seismic zone and seismicity in the mantle wedge beneath the Ogasawara Islands identified by an ocean bottom seismometer observation

No.	Seismological Bulletin of Japan (1)						This study (2)					Onset time difference (1)–(2) (s)	Location difference (1)–(2) (km)	Depth difference (1)–(2) (km)
No.	Origin time^a (JST)	Lat. (N) (°)	Long. (E) (°)	Depth (km)	Magnitude	Flag^b	Origin time^a (JST)	Lat. (N) (°)	Long. (E) (°)	Depth (km)	Magnitude	Onset time difference (1)–(2) (s)	Location difference (1)–(2) (km)	Depth difference (1)–(2) (km)
1	2015/07/20 20:53:13.62	27.56	141.37	115	4.3		2015/07/20 20:53:12.31	27.50	141.25	115	5.1	1.31	14	0
2	2015/07/25 12:04:46.21	27.46	142.92	7	3.6	S	2015/07/25 12:04:45.66	27.71	141.78	55	4.1	0.55	129	− 48
3	2015/07/27 01:30:56.34	26.93	142.33	32	2.8	S	2015/07/27 01:30:55.30	26.91	142.07	29	3.4	1.04	29	3
4	2015/07/29 04:39:02.43	26.71	142.44	28	2.0	S	2015/07/29 04:39:02.30	26.69	142.26	26	2.3	0.13	20	2
5	2015/07/31 04:37:07.26	27.29	142.20	97	3.0	S	2015/07/31 04:37:06.03	27.30	141.32	23	3.6	1.23	98	74
6	2015/08/03 10:07:07.93	27.19	140.85	26	3.0	S	2015/08/03 10:07:08.31	27.19	141.24	109	3.0	− 0.38	43	− 83
7	2015/08/17 03:15:10.80	27.16	142.43	76	2.4	S	2015/08/17 03:15:09.14	27.17	141.63	60	3.2	1.66	89	16
8	2015/08/17 05:56:47.02	27.02	142.31	131	2.9	S	2015/08/17 05:56:46.23	27.01	141.33	94	3.4	0.79	109	37
9	2015/09/02 01:39:14.65	27.57	141.72	106	2.9	S	2015/09/02 01:39:13.60	27.48	141.42	91	3.6	1.05	34	15
10	2015/09/05 19:06:22.19	27.70	141.78	83	3.7	S	2015/09/05 19:06:20.56	27.75	141.56	68	4.5	1.64	25	15
11	2015/09/14 12:47:45.24	26.93	141.37	121	4.1		2015/09/14 12:47:43.96	26.75	141.46	126	4.7	1.28	19	− 5
12	2015/09/20 01:39:07.46	27.65	142.63	86	3.2	S	2015/09/20 01:39:05.76	27.75	141.55	68	4.1	1.70	120	18
13	2015/09/22 05:30:44.80	26.76	142.34	16	1.9	S	2015/09/22 05:30:42.90	26.73	142.36	9	2.1	1.90	3	7
14	2015/09/28 08:34:47.75	27.73	142.55	89	3.6	S	2015/09/28 08:34:46.32	27.77	141.41	46	4.3	1.43	127	43
15	2015/09/29 02:36:42.81	27.02	142.37	24	2.4	S	2015/09/29 02:36:41.52	27.01	142.36	21	2.5	1.29	1	3
16	2015/10/02 18:17:21.24	27.79	141.96	86	3.5	S	2015/10/02 18:17:20.68	27.70	141.66	74	4.6	0.56	34	12
17	2015/10/02 23:46:25.35	26.69	142.44	29	3.0	S	2015/10/02 23:46:24.61	26.62	142.20	32	3.1	0.74	27	− 3

^aFormat: Year/Month/Day Hour:Minutes:Seconds
^bEarthquakes for which the hypocenters were determined with low precision are flagged with an “S”

Back to article page