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Sequence · 2011-09-16

M 6.7 · Observed seismic cluster · 99 km NE of Miyako, Japan

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 cluster27
M6+1
Analysis radius292 km
Observation window14 days
Largest secondary eventM 5.9
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Sequence timeline

Within first 24 hours15
Within first 7 days20
Observed duration13.9 d
Gap from reference eventM 0.8
0 h13.9 d
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Main-event impact

42 Felt reports · Shallow

54/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 6.799 km NE of Miyako, Japan30.0 km2011-09-16 19:26:40 UTCView event →
M 4.949 km E of Hachinohe, Japan35.0 km2011-09-16 19:39:50 UTCView event →
M 5.1137 km ENE of Miyako, Japan35.0 km2011-09-16 19:40:00 UTCView event →
M 5.7128 km ENE of Miyako, Japan35.0 km2011-09-16 20:11:16 UTCView event →
M 4.9138 km ENE of Miyako, Japan35.0 km2011-09-16 20:16:23 UTCView event →
M 5.9112 km NE of Miyako, Japan18.0 km2011-09-16 21:08:05 UTCView event →
M 5.8113 km ENE of Miyako, Japan40.7 km2011-09-16 21:36:38 UTCView event →
M 5.7122 km ENE of Miyako, Japan37.7 km2011-09-16 22:40:46 UTCView event →
M 4.7121 km ENE of Miyako, Japan35.7 km2011-09-17 01:18:54 UTCView event →
M 5.3106 km NE of Miyako, Japan30.0 km2011-09-17 07:33:57 UTCView event →
M 5.791 km NE of Miyako, Japan30.0 km2011-09-17 07:34:27 UTCView event →
M 4.7113 km ENE of Miyako, Japan52.9 km2011-09-17 08:24:03 UTCView event →
M 4.6123 km NE of Miyako, Japan36.9 km2011-09-17 11:16:15 UTCView event →
M 4.851 km ESE of Ishinomaki, Japan59.6 km2011-09-17 15:13:24 UTCView event →
M 5.2128 km ENE of Miyako, Japan22.1 km2011-09-17 17:54:47 UTCView event →
M 5.697 km ENE of Miyako, Japan10.0 km2011-09-18 07:04:18 UTCView event →
M 5.133 km S of Shizunai-furukawach?, Japan69.4 km2011-09-18 10:39:48 UTCView event →
M 4.936 km ENE of Ishinomaki, Japan65.9 km2011-09-20 20:59:05 UTCView event →
M 5.24 km WSW of ?tsuchi, Japan61.7 km2011-09-23 13:12:27 UTCView event →
M 4.9off the east coast of Honshu, Japan35.0 km2011-09-23 18:35:11 UTCView event →
M 4.563 km ESE of ?funato, Japan47.5 km2011-09-24 05:09:31 UTCView event →
M 4.9119 km SSW of Kushiro, Japan39.9 km2011-09-25 04:18:21 UTCView event →
M 4.727 km SE of Shizunai-furukawach?, Japan23.5 km2011-09-26 07:49:18 UTCView event →
M 4.9105 km ENE of Namie, Japan40.9 km2011-09-27 03:04:22 UTCView event →
M 4.871 km NE of Miyako, Japan63.7 km2011-09-28 02:17:06 UTCView event →
M 4.9115 km ENE of Miyako, Japan37.7 km2011-09-30 05:09:14 UTCView event →
M 5.0140 km ESE of Yamada, Japan10.0 km2011-09-30 15:51:01 UTCView 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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