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Sequence · 2003-10-08

M 6.7 · Observed seismic cluster · 39 km SSE of Kushiro, 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 cluster22
M6+1
Analysis radius292 km
Observation window14 days
Largest secondary eventM 5.9
Quake Pulse

Sequence timeline

Within first 24 hours6
Within first 7 days18
Observed duration12.9 d
Gap from reference eventM 0.8
0 h12.9 d
Quake Pulse

Main-event impact

Shallow

47/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 6.739 km SSE of Kushiro, Japan32.0 km2003-10-08 09:06:55 UTCView event →
M 5.987 km SSE of Kushiro, Japan33.0 km2003-10-08 13:32:09 UTCView event →
M 4.982 km S of Kushiro, Japan33.0 km2003-10-08 15:18:32 UTCView event →
M 5.888 km SSE of Kushiro, Japan33.0 km2003-10-08 23:15:17 UTCView event →
M 4.5152 km SSE of Kushiro, Japan33.0 km2003-10-09 03:13:45 UTCView event →
M 5.6134 km SE of Shizunai-furukawach?, Japan33.0 km2003-10-09 06:52:57 UTCView event →
M 5.1105 km SSE of Kushiro, Japan33.0 km2003-10-10 12:58:20 UTCView event →
M 5.8116 km S of Kushiro, Japan33.0 km2003-10-11 00:08:49 UTCView event →
M 5.3124 km S of Kushiro, Japan33.0 km2003-10-11 00:36:00 UTCView event →
M 4.5101 km S of Kushiro, Japan33.0 km2003-10-11 00:47:32 UTCView event →
M 5.6127 km ESE of Shizunai-furukawach?, Japan33.0 km2003-10-11 18:26:18 UTCView event →
M 4.670 km S of Kushiro, Japan33.0 km2003-10-12 06:36:28 UTCView event →
M 4.6Hokkaido, Japan region33.0 km2003-10-13 01:36:31 UTCView event →
M 4.696 km SSE of Kushiro, Japan33.0 km2003-10-14 01:35:44 UTCView event →
M 4.6144 km SSW of Kushiro, Japan33.0 km2003-10-14 11:55:02 UTCView event →
M 5.3151 km S of Kushiro, Japan33.0 km2003-10-14 12:39:22 UTCView event →
M 4.9182 km S of Kushiro, Japan33.0 km2003-10-14 13:31:54 UTCView event →
M 4.7126 km SSE of Kushiro, Japan33.0 km2003-10-15 08:07:22 UTCView event →
M 5.1154 km S of Kushiro, Japan33.0 km2003-10-17 22:50:09 UTCView event →
M 4.6119 km S of Kushiro, Japan33.0 km2003-10-18 23:03:33 UTCView event →
M 5.151 km SW of Nemuro, Japan83.9 km2003-10-19 23:27:27 UTCView event →
M 4.8131 km SE of Shizunai-furukawach?, Japan33.0 km2003-10-21 06:57:51 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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