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Sequence · 2010-02-26

M 7.0 · Observed seismic cluster · 70 km SE of Katsuren-haebaru, 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 radius340 km
Observation window14 days
Largest secondary eventM 5.2
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Sequence timeline

Within first 24 hours7
Within first 7 days17
Observed duration8.5 d
Gap from reference eventM 1.8
0 h8.5 d
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Main-event impact

774 Felt reports · Shallow

69/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 7.070 km SE of Katsuren-haebaru, Japan25.0 km2010-02-26 20:31:26 UTCView event →
M 4.945 km ESE of Itoman, Japan35.0 km2010-02-26 20:46:03 UTCView event →
M 4.874 km ESE of Katsuren-haebaru, Japan15.8 km2010-02-27 00:48:43 UTCView event →
M 4.576 km SE of Katsuren-haebaru, Japan4.2 km2010-02-27 01:33:20 UTCView event →
M 4.881 km SE of Katsuren-haebaru, Japan35.0 km2010-02-27 09:38:20 UTCView event →
M 5.269 km SE of Katsuren-haebaru, Japan35.0 km2010-02-27 12:19:54 UTCView event →
M 4.684 km SE of Katsuren-haebaru, Japan35.0 km2010-02-27 20:18:14 UTCView event →
M 5.071 km SE of Katsuren-haebaru, Japan3.5 km2010-02-28 01:20:29 UTCView event →
M 4.568 km SE of Katsuren-haebaru, Japan35.0 km2010-02-28 02:50:24 UTCView event →
M 5.074 km SE of Katsuren-haebaru, Japan1.3 km2010-02-28 02:51:41 UTCView event →
M 4.874 km SE of Katsuren-haebaru, Japan14.4 km2010-02-28 03:33:46 UTCView event →
M 4.542 km ESE of Nago, Japan29.1 km2010-02-28 10:32:22 UTCView event →
M 4.567 km SE of Katsuren-haebaru, Japan35.0 km2010-02-28 12:11:15 UTCView event →
M 4.870 km SE of Katsuren-haebaru, Japan36.3 km2010-03-01 03:15:59 UTCView event →
M 4.667 km ESE of Katsuren-haebaru, Japan35.0 km2010-03-01 05:01:33 UTCView event →
M 4.964 km SE of Katsuren-haebaru, Japan35.0 km2010-03-02 08:21:43 UTCView event →
M 4.974 km SE of Katsuren-haebaru, Japan35.0 km2010-03-02 09:35:20 UTCView event →
M 4.551 km SE of Katsuren-haebaru, Japan16.4 km2010-03-07 08:13:43 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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