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Sequence · 2004-05-29

M 6.5 · Observed seismic cluster · 140 km SE of Katsuura, 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 cluster12
M6+1
Analysis radius260 km
Observation window14 days
Largest secondary eventM 5.3
Quake Pulse

Sequence timeline

Within first 24 hours5
Within first 7 days10
Observed duration11.7 d
Gap from reference eventM 1.2
0 h11.7 d
Quake Pulse

Main-event impact

Shallow

38/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 6.5140 km SE of Katsuura, Japan16.0 km2004-05-29 20:56:09 UTCView event →
M 4.8158 km SE of Katsuura, Japan10.0 km2004-05-29 21:32:30 UTCView event →
M 4.8159 km SE of Katsuura, Japan10.0 km2004-05-29 22:25:08 UTCView event →
M 4.9154 km SE of Katsuura, Japan24.4 km2004-05-29 22:26:42 UTCView event →
M 4.5156 km SE of Katsuura, Japan10.0 km2004-05-29 23:15:37 UTCView event →
M 4.6132 km SE of Katsuura, Japan10.0 km2004-06-01 00:58:27 UTCView event →
M 5.3122 km SE of Katsuura, Japan17.6 km2004-06-01 03:08:48 UTCView event →
M 4.5160 km SE of Katsuura, Japan10.0 km2004-06-03 00:18:32 UTCView event →
M 4.5162 km SE of Katsuura, Japan10.0 km2004-06-03 12:23:46 UTCView event →
M 4.5140 km ESE of Katsuura, Japan44.0 km2004-06-05 16:46:25 UTCView event →
M 5.1145 km SE of Katsuura, Japan40.9 km2004-06-09 08:27:09 UTCView event →
M 4.6170 km SE of Katsuura, Japan45.0 km2004-06-10 12:37:34 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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