Sequence · 2005-01-19

M 6.6 · Observed seismic cluster · 161 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 cluster18
M6+1
Analysis radius276 km
Observation window14 days
Largest secondary eventM 5.8
Quake Pulse

Sequence timeline

Within first 24 hours11
Within first 7 days18
Observed duration2.6 d
Gap from reference eventM 0.8
0 h2.6 d
Quake Pulse

Main-event impact

10 Felt reports · Shallow

49/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 6.6161 km SE of Katsuura, Japan27.8 km2005-01-19 06:11:36 UTCView event →
M 5.3155 km SE of Katsuura, Japan10.0 km2005-01-19 06:17:07 UTCView event →
M 4.5181 km SE of Katsuura, Japan28.2 km2005-01-19 06:36:29 UTCView event →
M 4.9202 km SE of Katsuura, Japan10.0 km2005-01-19 06:54:10 UTCView event →
M 4.8159 km SE of Katsuura, Japan47.9 km2005-01-19 07:11:14 UTCView event →
M 4.5197 km SE of Katsuura, Japan10.0 km2005-01-19 07:54:46 UTCView event →
M 4.6175 km SE of Katsuura, Japan43.4 km2005-01-19 08:05:19 UTCView event →
M 4.8163 km SE of Katsuura, Japan34.2 km2005-01-19 11:09:27 UTCView event →
M 5.0184 km SE of Katsuura, Japan16.2 km2005-01-19 13:51:53 UTCView event →
M 4.8183 km SE of Katsuura, Japan26.4 km2005-01-19 16:38:10 UTCView event →
M 4.5263 km SE of Katsuura, Japan20.6 km2005-01-20 02:37:12 UTCView event →
M 5.4180 km SE of Katsuura, Japan51.3 km2005-01-20 14:16:26 UTCView event →
M 5.7168 km SE of Katsuura, Japan10.0 km2005-01-21 12:45:31 UTCView event →
M 4.5166 km SE of Katsuura, Japan10.0 km2005-01-21 12:58:11 UTCView event →
M 5.8159 km SE of Katsuura, Japan10.0 km2005-01-21 17:58:56 UTCView event →
M 4.5188 km SE of Katsuura, Japan10.0 km2005-01-21 18:07:25 UTCView event →
M 5.0177 km SE of Katsuura, Japan10.0 km2005-01-21 18:10:35 UTCView event →
M 4.6183 km SE of Katsuura, Japan7.5 km2005-01-21 20:51:25 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.

Blog

Latest from the blog

Guides, explainers and practical reading to go beyond the live data.

View all articles →