Sequence · 2011-04-11

M 6.6 · Observed seismic cluster · 17 km SSW of Ishikawa, Japan

Name: M 6.6 · Observed seismic cluster · 17 km SSW of Ishikawa, Japan | Quake Pulse
Creator: Quake Pulse

Explore clusters of M4.5+ events observed around significant earthquakes. These clusters are descriptive and are not presented as earthquake predictions.

M4.5+ events in cluster138

M6+3

Analysis radius276 km

Observation window14 days

Largest secondary eventM 6.2

Quake Pulse

Sequence timeline

Within first 24 hours48

Within first 7 days97

Observed duration13.9 d

Gap from reference eventM 0.4

0 h13.9 d

Quake Pulse

Main-event impact

214 Felt reports · Shallow

57/100

Impact and context →

M4.5+ events in cluster

Magnitude	Location	Depth	Time
M 6.6	17 km SSW of Ishikawa, Japan	11.0 km	2011-04-11 08:16:12 UTC	View event →
M 5.8	14 km SSE of Marumori, Japan	10.0 km	2011-04-11 08:16:50 UTC	View event →
M 5.2	13 km SW of Ishikawa, Japan	48.9 km	2011-04-11 08:26:35 UTC	View event →
M 4.7	14 km S of Ishikawa, Japan	52.6 km	2011-04-11 08:33:57 UTC	View event →
M 4.5	12 km N of Kitaibaraki, Japan	33.6 km	2011-04-11 08:45:15 UTC	View event →
M 4.7	1 km WSW of Ishikawa, Japan	40.5 km	2011-04-11 08:45:42 UTC	View event →
M 4.5	6 km NW of Takahagi, Japan	35.0 km	2011-04-11 08:48:14 UTC	View event →
M 5.0	15 km SSW of Ishikawa, Japan	38.1 km	2011-04-11 08:58:07 UTC	View event →
M 4.7	15 km ESE of Ishikawa, Japan	50.2 km	2011-04-11 08:59:50 UTC	View event →
M 4.9	12 km S of Ishikawa, Japan	48.4 km	2011-04-11 09:05:23 UTC	View event →
M 4.7	19 km NE of Daigo, Japan	35.0 km	2011-04-11 09:12:35 UTC	View event →
M 4.7	132 km SE of Ishinomaki, Japan	35.0 km	2011-04-11 09:17:14 UTC	View event →
M 4.7	16 km S of Ishikawa, Japan	36.7 km	2011-04-11 09:30:38 UTC	View event →
M 4.8	21 km NNE of Daigo, Japan	37.0 km	2011-04-11 09:36:25 UTC	View event →
M 4.8	19 km SE of Ishikawa, Japan	26.5 km	2011-04-11 09:48:16 UTC	View event →
M 4.7	20 km NW of Kitaibaraki, Japan	36.3 km	2011-04-11 10:00:08 UTC	View event →
M 4.7	16 km SE of Ishikawa, Japan	35.0 km	2011-04-11 10:19:03 UTC	View event →
M 4.5	18 km W of Iwaki, Japan	51.2 km	2011-04-11 10:25:52 UTC	View event →
M 4.5	19 km NNW of Kitaibaraki, Japan	35.0 km	2011-04-11 11:00:27 UTC	View event →
M 4.7	10 km SE of Ishikawa, Japan	35.6 km	2011-04-11 11:27:34 UTC	View event →
M 5.5	20 km SSW of Ishikawa, Japan	10.0 km	2011-04-11 11:42:35 UTC	View event →
M 4.6	23 km SSE of Ishikawa, Japan	35.0 km	2011-04-11 12:47:24 UTC	View event →
M 4.8	9 km SSE of Ishikawa, Japan	42.3 km	2011-04-11 13:05:44 UTC	View event →
M 4.5	101 km ESE of Ishinomaki, Japan	18.5 km	2011-04-11 13:24:10 UTC	View event →
M 4.5	137 km E of Namie, Japan	34.9 km	2011-04-11 15:08:08 UTC	View event →
M 4.7	16 km NNW of Daigo, Japan	40.7 km	2011-04-11 15:21:43 UTC	View event →
M 4.5	17 km WSW of Iwaki, Japan	47.0 km	2011-04-11 15:55:17 UTC	View event →
M 4.9	11 km SSW of Ishikawa, Japan	46.1 km	2011-04-11 15:58:01 UTC	View event →
M 4.5	17 km S of Ishikawa, Japan	47.5 km	2011-04-11 17:21:05 UTC	View event →
M 4.5	21 km SSE of Ishikawa, Japan	36.9 km	2011-04-11 20:03:47 UTC	View event →
M 4.7	44 km E of Ishinomaki, Japan	72.4 km	2011-04-11 21:03:38 UTC	View event →
M 4.7	35 km SSE of ?funato, Japan	33.5 km	2011-04-11 21:21:17 UTC	View event →
M 4.5	19 km SSW of Ishikawa, Japan	53.9 km	2011-04-11 22:03:23 UTC	View event →
M 5.5	8 km WSW of Iiyama, Japan	17.1 km	2011-04-11 22:26:20 UTC	View event →
M 4.7	11 km ESE of Nakano, Japan	35.0 km	2011-04-11 22:32:55 UTC	View event →
M 4.7	53 km ENE of Ishinomaki, Japan	66.4 km	2011-04-11 22:45:34 UTC	View event →
M 6.2	23 km SE of T?gane, Japan	15.0 km	2011-04-11 23:08:16 UTC	View event →
M 4.5	16 km ESE of Suzaka, Japan	35.0 km	2011-04-11 23:24:25 UTC	View event →
M 4.8	17 km SSE of Ishikawa, Japan	46.6 km	2011-04-11 23:48:19 UTC	View event →
M 4.5	16 km S of Ishikawa, Japan	7.6 km	2011-04-12 00:09:28 UTC	View event →
M 4.5	48 km S of Hasaki, Japan	35.0 km	2011-04-12 01:23:53 UTC	View event →
M 4.6	39 km ESE of Namie, Japan	56.2 km	2011-04-12 01:33:11 UTC	View event →
M 4.6	19 km SSW of Ishikawa, Japan	10.0 km	2011-04-12 02:13:50 UTC	View event →
M 5.9	8 km WSW of Ishikawa, Japan	11.0 km	2011-04-12 05:07:41 UTC	View event →
M 4.7	20 km ESE of Ishikawa, Japan	35.0 km	2011-04-12 05:26:36 UTC	View event →
M 4.7	3 km WNW of Nakano, Japan	17.4 km	2011-04-12 07:15:02 UTC	View event →
M 4.6	58 km E of Kitaibaraki, Japan	63.3 km	2011-04-12 07:42:47 UTC	View event →
M 4.5	19 km WNW of Iwaki, Japan	58.6 km	2011-04-12 07:47:22 UTC	View event →
M 4.8	8 km SSW of Ishikawa, Japan	40.8 km	2011-04-12 08:48:30 UTC	View event →
M 4.5	18 km E of Ishikawa, Japan	52.2 km	2011-04-12 10:15:40 UTC	View event →
M 4.5	off the east coast of Honshu, Japan	41.7 km	2011-04-12 15:41:41 UTC	View event →
M 4.5	186 km E of Namie, Japan	24.7 km	2011-04-12 18:02:28 UTC	View event →
M 4.6	18 km S of Ishikawa, Japan	43.4 km	2011-04-12 19:02:20 UTC	View event →
M 4.9	102 km ESE of Takahagi, Japan	22.6 km	2011-04-12 21:52:08 UTC	View event →
M 5.1	29 km ENE of ?hara, Japan	19.0 km	2011-04-12 23:36:21 UTC	View event →
M 4.7	46 km ESE of Ishinomaki, Japan	69.9 km	2011-04-12 23:54:15 UTC	View event →
M 4.6	110 km E of Namie, Japan	37.0 km	2011-04-13 00:13:02 UTC	View event →
M 5.3	21 km NNE of Daigo, Japan	32.0 km	2011-04-13 01:08:02 UTC	View event →
M 4.5	31 km NE of Hasaki, Japan	42.5 km	2011-04-13 03:17:00 UTC	View event →
M 4.7	129 km ESE of Namie, Japan	35.0 km	2011-04-13 05:41:05 UTC	View event →
M 4.6	162 km ESE of Ishinomaki, Japan	31.1 km	2011-04-13 12:05:36 UTC	View event →
M 4.5	36 km E of Iwaki, Japan	35.0 km	2011-04-13 12:58:21 UTC	View event →
M 4.5	21 km S of Ishikawa, Japan	39.1 km	2011-04-13 21:43:10 UTC	View event →
M 4.7	168 km ESE of Iwaki, Japan	35.0 km	2011-04-13 22:05:07 UTC	View event →
M 5.0	near the east coast of Honshu, Japan	25.0 km	2011-04-13 22:35:53 UTC	View event →
M 4.5	81 km E of Ishinomaki, Japan	24.0 km	2011-04-14 00:10:06 UTC	View event →
M 5.1	22 km SE of Ishikawa, Japan	10.0 km	2011-04-14 03:08:57 UTC	View event →
M 4.6	127 km ENE of Hasaki, Japan	12.7 km	2011-04-14 04:13:41 UTC	View event →
M 5.1	74 km ESE of Iwaki, Japan	36.2 km	2011-04-14 06:07:09 UTC	View event →
M 5.7	96 km ESE of Hasaki, Japan	10.0 km	2011-04-14 06:08:47 UTC	View event →
M 4.6	89 km ESE of Kitaibaraki, Japan	35.9 km	2011-04-14 08:47:14 UTC	View event →
M 4.6	9 km NW of Takahagi, Japan	35.0 km	2011-04-14 11:02:30 UTC	View event →
M 4.5	2 km WNW of Iwaki, Japan	25.4 km	2011-04-14 11:24:32 UTC	View event →
M 4.8	22 km SSW of Namie, Japan	94.2 km	2011-04-14 23:50:24 UTC	View event →
M 4.8	163 km ESE of Iwaki, Japan	30.5 km	2011-04-15 00:56:27 UTC	View event →
M 4.6	19 km E of Namie, Japan	35.0 km	2011-04-15 12:53:08 UTC	View event →
M 5.0	128 km ESE of Namie, Japan	27.6 km	2011-04-15 21:10:37 UTC	View event →
M 5.8	6 km ENE of Tanuma, Japan	77.0 km	2011-04-16 02:19:30 UTC	View event →
M 4.6	47 km ENE of Namie, Japan	59.3 km	2011-04-16 04:19:55 UTC	View event →
M 4.5	60 km ESE of Ishinomaki, Japan	60.8 km	2011-04-16 07:20:22 UTC	View event →
M 4.7	21 km NE of Iiyama, Japan	17.0 km	2011-04-16 15:56:23 UTC	View event →
M 4.7	5 km NW of Iwaki, Japan	25.4 km	2011-04-16 20:19:18 UTC	View event →
M 4.8	28 km NE of Kashima-shi, Japan	61.7 km	2011-04-16 20:21:34 UTC	View event →
M 4.6	near the east coast of Honshu, Japan	45.2 km	2011-04-16 20:54:11 UTC	View event →
M 4.7	67 km SE of ?funato, Japan	36.2 km	2011-04-17 01:37:51 UTC	View event →
M 4.5	5 km ESE of Narita, Japan	22.0 km	2011-04-17 04:38:59 UTC	View event →
M 4.6	7 km SE of Narita, Japan	39.4 km	2011-04-17 06:49:24 UTC	View event →
M 4.6	25 km ESE of Namie, Japan	59.5 km	2011-04-17 07:12:52 UTC	View event →
M 4.7	eastern Honshu, Japan	24.4 km	2011-04-17 12:51:45 UTC	View event →
M 4.6	4 km NE of Iwaki, Japan	19.1 km	2011-04-17 14:46:53 UTC	View event →
M 4.9	22 km E of Iwaki, Japan	20.9 km	2011-04-17 15:47:29 UTC	View event →
M 4.7	79 km ESE of Kitaibaraki, Japan	22.5 km	2011-04-17 16:00:02 UTC	View event →
M 4.5	46 km E of Namie, Japan	46.5 km	2011-04-17 16:48:01 UTC	View event →
M 4.6	122 km ESE of Ishinomaki, Japan	23.5 km	2011-04-17 17:34:20 UTC	View event →
M 4.7	7 km E of Honch?, Japan	66.8 km	2011-04-17 18:08:48 UTC	View event →
M 4.5	47 km ESE of Takahagi, Japan	35.0 km	2011-04-17 20:20:34 UTC	View event →
M 4.5	5 km ENE of Ishikawa, Japan	43.1 km	2011-04-18 02:08:18 UTC	View event →
M 4.6	58 km ENE of Ishinomaki, Japan	35.0 km	2011-04-18 10:56:04 UTC	View event →
M 4.7	81 km E of ?arai, Japan	28.8 km	2011-04-18 17:54:18 UTC	View event →
M 4.6	72 km NE of Hasaki, Japan	49.4 km	2011-04-18 21:16:48 UTC	View event →
M 4.8	60 km ESE of Kitaibaraki, Japan	21.6 km	2011-04-18 21:33:49 UTC	View event →
M 5.0	223 km E of Namie, Japan	14.5 km	2011-04-19 04:04:30 UTC	View event →
M 4.6	8 km S of Ishikawa, Japan	39.2 km	2011-04-19 06:53:37 UTC	View event →
M 4.9	5 km NNE of Kazo, Japan	64.2 km	2011-04-19 14:10:20 UTC	View event →
M 4.6	14 km NE of Kitaibaraki, Japan	2.0 km	2011-04-19 14:47:06 UTC	View event →
M 4.5	35 km SSE of Hasaki, Japan	12.5 km	2011-04-19 19:02:06 UTC	View event →
M 4.6	22 km ENE of Iwaki, Japan	62.2 km	2011-04-19 19:29:24 UTC	View event →
M 4.6	31 km E of ?arai, Japan	28.7 km	2011-04-19 21:38:01 UTC	View event →
M 4.8	10 km S of Ishikawa, Japan	37.3 km	2011-04-20 00:50:54 UTC	View event →
M 4.5	157 km ESE of Iwaki, Japan	35.0 km	2011-04-20 07:40:33 UTC	View event →
M 4.7	97 km NE of Hasaki, Japan	38.1 km	2011-04-20 07:52:18 UTC	View event →
M 4.5	21 km SE of Takahagi, Japan	53.9 km	2011-04-20 15:29:45 UTC	View event →
M 4.7	38 km SE of Ishinomaki, Japan	63.8 km	2011-04-20 16:33:21 UTC	View event →
M 4.6	1 km S of Moriya, Japan	76.2 km	2011-04-20 18:25:07 UTC	View event →
M 4.5	117 km ENE of Hasaki, Japan	17.5 km	2011-04-20 20:54:40 UTC	View event →
M 5.0	113 km ESE of Namie, Japan	24.2 km	2011-04-21 03:08:37 UTC	View event →
M 5.0	70 km E of Ishinomaki, Japan	40.2 km	2011-04-21 08:18:16 UTC	View event →
M 6.2	6 km WNW of T?gane, Japan	43.0 km	2011-04-21 13:37:03 UTC	View event →
M 5.1	4 km E of Asahi, Japan	35.0 km	2011-04-21 13:47:11 UTC	View event →
M 4.8	9 km SSW of Asahi, Japan	44.1 km	2011-04-21 13:54:00 UTC	View event →
M 4.7	18 km SSE of Asahi, Japan	41.6 km	2011-04-21 15:06:50 UTC	View event →
M 5.6	20 km ENE of Namie, Japan	55.6 km	2011-04-21 16:11:18 UTC	View event →
M 4.6	75 km ESE of Kitaibaraki, Japan	33.7 km	2011-04-21 20:28:43 UTC	View event →
M 4.7	41 km ENE of Ishinomaki, Japan	41.0 km	2011-04-22 03:12:54 UTC	View event →
M 4.6	82 km ESE of Namie, Japan	12.5 km	2011-04-22 08:42:40 UTC	View event →
M 5.2	21 km NNE of Iwaki, Japan	23.5 km	2011-04-22 15:25:17 UTC	View event →
M 4.6	77 km ENE of Hasaki, Japan	22.9 km	2011-04-23 10:59:23 UTC	View event →
M 4.5	113 km ESE of Iwaki, Japan	21.8 km	2011-04-23 11:38:13 UTC	View event →
M 4.5	3 km S of ?miya, Japan	69.8 km	2011-04-23 14:31:31 UTC	View event →
M 4.5	30 km SE of Namie, Japan	36.8 km	2011-04-23 20:05:00 UTC	View event →
M 4.6	80 km SE of Hasaki, Japan	16.1 km	2011-04-23 22:06:51 UTC	View event →
M 4.6	62 km ESE of Katsuura, Japan	14.2 km	2011-04-24 05:06:07 UTC	View event →
M 4.7	58 km ESE of Katsuura, Japan	11.1 km	2011-04-24 09:30:11 UTC	View event →
M 4.7	46 km SSE of ?funato, Japan	59.4 km	2011-04-24 09:51:58 UTC	View event →
M 4.9	9 km SE of Ishikawa, Japan	43.1 km	2011-04-24 10:09:55 UTC	View event →
M 4.6	55 km SE of Ishinomaki, Japan	61.7 km	2011-04-24 14:34:04 UTC	View event →
M 5.0	49 km E of ?hara, Japan	41.1 km	2011-04-24 21:06:38 UTC	View event →
M 4.6	77 km ESE of Iwaki, Japan	39.2 km	2011-04-25 06:41:25 UTC	View event →

Interpretation

Explore clusters of M4.5+ events observed around significant earthquakes. These clusters are descriptive and are not presented as earthquake predictions. Historical small-earthquake detection varies through time. Long-term comparisons are most robust at higher magnitude thresholds.

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