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Sequence · 2010-07-18

M 6.7 · Observed seismic cluster · 66 km W of Nikolski, Alaska

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 cluster24
M6+2
Analysis radius292 km
Observation window14 days
Largest secondary eventM 6.0
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Sequence timeline

Within first 24 hours7
Within first 7 days19
Observed duration11.0 d
Gap from reference eventM 0.7
0 h11.0 d
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Main-event impact

13 Felt reports · Shallow

50/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 6.766 km W of Nikolski, Alaska14.0 km2010-07-18 05:56:44 UTCView event →
M 4.554 km SW of Nikolski, Alaska4.8 km2010-07-18 06:15:48 UTCView event →
M 4.755 km WSW of Nikolski, Alaska6.7 km2010-07-18 06:16:37 UTCView event →
M 4.851 km WSW of Nikolski, Alaska3.1 km2010-07-18 10:07:22 UTCView event →
M 6.059 km WSW of Nikolski, Alaska10.0 km2010-07-18 19:48:04 UTCView event →
M 4.849 km WSW of Nikolski, Alaska10.0 km2010-07-18 19:49:42 UTCView event →
M 4.751 km WSW of Nikolski, Alaska3.5 km2010-07-19 02:03:54 UTCView event →
M 5.744 km SW of Nikolski, Alaska10.0 km2010-07-19 08:20:30 UTCView event →
M 5.553 km WSW of Nikolski, Alaska10.0 km2010-07-19 08:23:14 UTCView event →
M 4.662 km WSW of Nikolski, Alaska10.0 km2010-07-19 09:02:05 UTCView event →
M 4.737 km SW of Nikolski, Alaska3.5 km2010-07-19 12:52:01 UTCView event →
M 4.653 km WSW of Nikolski, Alaska10.0 km2010-07-19 13:43:18 UTCView event →
M 4.547 km SW of Nikolski, Alaska6.8 km2010-07-19 14:22:29 UTCView event →
M 5.143 km WSW of Nikolski, Alaska2.5 km2010-07-19 14:24:40 UTCView event →
M 4.552 km WSW of Nikolski, Alaska6.0 km2010-07-19 17:25:10 UTCView event →
M 5.059 km WSW of Nikolski, Alaska5.0 km2010-07-19 19:09:06 UTCView event →
M 5.052 km SW of Nikolski, Alaska13.2 km2010-07-20 12:53:50 UTCView event →
M 5.163 km WSW of Nikolski, Alaska4.8 km2010-07-21 05:51:46 UTCView event →
M 4.654 km WSW of Nikolski, Alaska4.9 km2010-07-23 08:20:42 UTCView event →
M 4.558 km WSW of Nikolski, Alaska3.8 km2010-07-26 03:37:26 UTCView event →
M 5.6Fox Islands, Aleutian Islands, Alaska10.0 km2010-07-28 11:31:46 UTCView event →
M 5.247 km SW of Nikolski, Alaska14.9 km2010-07-28 12:07:44 UTCView event →
M 4.665 km W of Nikolski, Alaska10.0 km2010-07-29 03:52:46 UTCView event →
M 4.648 km WSW of Nikolski, Alaska10.0 km2010-07-29 04:55:49 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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