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Sequence · 2015-02-16

M 6.7 · Observed seismic cluster · 83 km ENE 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 cluster19
M6+3
Analysis radius292 km
Observation window14 days
Largest secondary eventM 6.2
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Sequence timeline

Within first 24 hours6
Within first 7 days15
Observed duration9.1 d
Gap from reference eventM 0.5
0 h9.1 d
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Main-event impact

44 Felt reports · PAGER GREEN · Tsunami indicator · Shallow

64/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 6.783 km ENE of Miyako, Japan23.0 km2015-02-16 23:06:28 UTCView event →
M 4.6107 km ENE of Miyako, Japan10.0 km2015-02-17 00:50:02 UTCView event →
M 4.573 km ENE of Miyako, Japan35.0 km2015-02-17 01:15:06 UTCView event →
M 4.889 km E of Miyako, Japan29.4 km2015-02-17 02:29:52 UTCView event →
M 5.551 km N of Miyako, Japan47.0 km2015-02-17 04:46:38 UTCView event →
M 5.5140 km E of Yamada, Japan10.0 km2015-02-17 16:33:21 UTCView event →
M 6.2142 km E of Miyako, Japan10.0 km2015-02-20 04:25:23 UTCView event →
M 5.349 km SSE of Shizunai-furukawach?, Japan60.3 km2015-02-20 19:28:27 UTCView event →
M 4.8139 km E of Miyako, Japan20.6 km2015-02-20 21:05:54 UTCView event →
M 4.7156 km E of Yamada, Japan14.8 km2015-02-20 23:56:54 UTCView event →
M 4.6144 km E of Miyako, Japan10.0 km2015-02-21 03:42:48 UTCView event →
M 6.0133 km E of Miyako, Japan7.0 km2015-02-21 10:13:53 UTCView event →
M 5.0151 km ENE of Miyako, Japan10.0 km2015-02-22 02:53:42 UTCView event →
M 5.1115 km E of Miyako, Japan10.0 km2015-02-22 19:43:32 UTCView event →
M 4.6145 km E of Miyako, Japan10.0 km2015-02-23 01:37:39 UTCView event →
M 5.8107 km E of Miyako, Japan20.0 km2015-02-24 02:28:54 UTCView event →
M 4.635 km SE of Kamaishi, Japan35.0 km2015-02-24 10:36:14 UTCView event →
M 4.9122 km E of Yamada, Japan17.3 km2015-02-25 10:32:03 UTCView event →
M 5.065 km E of Ishinomaki, Japan52.0 km2015-02-26 01:11:23 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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