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Sequence · 2013-10-25

M 7.1 · Observed seismic cluster · off the east coast of Honshu, 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 cluster33
M6+1
Analysis radius356 km
Observation window14 days
Largest secondary eventM 5.5
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Sequence timeline

Within first 24 hours18
Within first 7 days27
Observed duration13.7 d
Gap from reference eventM 1.6
0 h13.7 d
Quake Pulse

Main-event impact

160 Felt reports · PAGER GREEN · Tsunami indicator · Shallow

73/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 7.1off the east coast of Honshu, Japan35.0 km2013-10-25 17:10:19 UTCView event →
M 5.1off the east coast of Honshu, Japan35.7 km2013-10-25 17:22:53 UTCView event →
M 5.4off the east coast of Honshu, Japan37.0 km2013-10-25 17:27:59 UTCView event →
M 4.7off the east coast of Honshu, Japan37.5 km2013-10-25 17:36:46 UTCView event →
M 4.8off the east coast of Honshu, Japan17.5 km2013-10-25 17:47:56 UTCView event →
M 4.8off the east coast of Honshu, Japan31.3 km2013-10-25 17:52:30 UTCView event →
M 5.1off the east coast of Honshu, Japan33.9 km2013-10-25 17:57:39 UTCView event →
M 4.6off the east coast of Honshu, Japan36.1 km2013-10-25 18:03:09 UTCView event →
M 4.6off the east coast of Honshu, Japan35.1 km2013-10-25 18:07:58 UTCView event →
M 4.6228 km ESE of Hasaki, Japan25.8 km2013-10-25 19:02:08 UTCView event →
M 4.8off the east coast of Honshu, Japan18.8 km2013-10-25 19:02:58 UTCView event →
M 4.6off the east coast of Honshu, Japan11.6 km2013-10-25 19:07:24 UTCView event →
M 4.9off the east coast of Honshu, Japan35.6 km2013-10-25 20:21:08 UTCView event →
M 5.5off the east coast of Honshu, Japan10.0 km2013-10-25 21:27:34 UTCView event →
M 4.8off the east coast of Honshu, Japan29.1 km2013-10-26 01:06:49 UTCView event →
M 4.6off the east coast of Honshu, Japan34.3 km2013-10-26 02:08:06 UTCView event →
M 4.6off the east coast of Honshu, Japan41.4 km2013-10-26 05:18:45 UTCView event →
M 4.5off the east coast of Honshu, Japan44.0 km2013-10-26 07:30:43 UTCView event →
M 4.5off the east coast of Honshu, Japan10.0 km2013-10-27 05:33:55 UTCView event →
M 5.5off the east coast of Honshu, Japan20.2 km2013-10-27 18:13:06 UTCView event →
M 4.5off the east coast of Honshu, Japan35.0 km2013-10-27 20:47:26 UTCView event →
M 5.0off the east coast of Honshu, Japan10.1 km2013-10-27 23:01:45 UTCView event →
M 4.7off the east coast of Honshu, Japan34.5 km2013-10-28 16:41:10 UTCView event →
M 4.7291 km ESE of Namie, Japan26.3 km2013-10-29 15:12:01 UTCView event →
M 4.833 km ENE of Iwaki, Japan29.0 km2013-10-30 03:22:01 UTCView event →
M 4.744 km ESE of ?arai, Japan45.4 km2013-10-30 22:00:44 UTCView event →
M 5.3121 km E of Ishinomaki, Japan22.0 km2013-10-31 15:01:05 UTCView event →
M 4.5154 km E of Namie, Japan35.0 km2013-11-03 00:38:04 UTCView event →
M 5.2123 km E of Ishinomaki, Japan35.0 km2013-11-03 08:52:56 UTCView event →
M 4.835 km ESE of Kitaibaraki, Japan25.0 km2013-11-04 13:47:20 UTCView event →
M 4.756 km ESE of Kitaibaraki, Japan5.7 km2013-11-04 14:21:51 UTCView event →
M 4.7off the east coast of Honshu, Japan35.0 km2013-11-05 09:45:14 UTCView event →
M 4.584 km E of ?arai, Japan48.0 km2013-11-08 09:15:22 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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