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Sequence · 2004-11-28

M 7.0 · Observed seismic cluster · 51 km SW of Nemuro, 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 cluster10
M6+2
Analysis radius340 km
Observation window14 days
Largest secondary eventM 6.8
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Sequence timeline

Within first 24 hours5
Within first 7 days6
Observed duration10.2 d
Gap from reference eventM 0.2
0 h10.2 d
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Main-event impact

42 Felt reports · Shallow

61/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 7.051 km SW of Nemuro, Japan39.0 km2004-11-28 18:32:14 UTCView event →
M 5.954 km SW of Nemuro, Japan39.5 km2004-11-28 18:36:41 UTCView event →
M 4.841 km SSW of Nemuro, Japan42.2 km2004-11-28 19:02:21 UTCView event →
M 5.042 km SSW of Nemuro, Japan41.5 km2004-11-29 08:00:22 UTCView event →
M 4.560 km SSW of Nemuro, Japan38.3 km2004-11-29 16:36:29 UTCView event →
M 4.571 km ENE of Mutsu, Japan74.0 km2004-12-01 06:52:29 UTCView event →
M 4.967 km ENE of Mutsu, Japan69.1 km2004-12-05 19:45:32 UTCView event →
M 6.854 km SSW of Nemuro, Japan35.0 km2004-12-06 14:15:11 UTCView event →
M 4.844 km S of Shikotan, Russia88.4 km2004-12-08 08:55:42 UTCView event →
M 4.650 km S of Nemuro, Japan39.3 km2004-12-08 23:52:01 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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