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Sequence · 2011-02-11

M 6.9 · Observed seismic cluster · 21 km N of Tomé, Chile

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 cluster34
M6+4
Analysis radius324 km
Observation window14 days
Largest secondary eventM 6.7
Quake Pulse

Sequence timeline

Within first 24 hours14
Within first 7 days30
Observed duration12.4 d
Gap from reference eventM 0.2
0 h12.4 d
Quake Pulse

Main-event impact

381 Felt reports · Shallow

64/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 6.921 km N of Tomé, Chile26.0 km2011-02-11 20:05:30 UTCView event →
M 5.325 km NW of Tomé, Chile38.9 km2011-02-11 20:16:42 UTCView event →
M 4.537 km WNW of Talcahuano, Chile31.4 km2011-02-11 20:41:26 UTCView event →
M 4.621 km NNW of Talcahuano, Chile35.4 km2011-02-11 20:43:10 UTCView event →
M 4.851 km NW of Talcahuano, Chile18.4 km2011-02-11 21:01:16 UTCView event →
M 4.615 km NNW of Talcahuano, Chile45.9 km2011-02-11 21:04:21 UTCView event →
M 5.330 km WNW of Talcahuano, Chile17.7 km2011-02-11 21:45:57 UTCView event →
M 4.735 km W of Talcahuano, Chile11.1 km2011-02-11 22:12:41 UTCView event →
M 5.911 km ENE of Arauco, Chile15.0 km2011-02-11 23:39:21 UTCView event →
M 6.113 km SSE of Chiguayante, Chile16.0 km2011-02-12 01:17:01 UTCView event →
M 4.544 km WNW of Arauco, Chile10.0 km2011-02-12 01:37:40 UTCView event →
M 4.628 km NW of Talcahuano, Chile7.0 km2011-02-12 05:19:21 UTCView event →
M 4.528 km WNW of Talcahuano, Chile7.0 km2011-02-12 12:40:50 UTCView event →
M 4.872 km WNW of Arauco, Chile24.7 km2011-02-12 15:25:02 UTCView event →
M 5.818 km NNW of Talcahuano, Chile20.7 km2011-02-13 08:51:34 UTCView event →
M 6.09 km NNW of Talcahuano, Chile17.0 km2011-02-13 10:35:06 UTCView event →
M 4.646 km W of Talcahuano, Chile18.3 km2011-02-13 10:41:38 UTCView event →
M 4.516 km NW of Talcahuano, Chile7.1 km2011-02-13 10:55:32 UTCView event →
M 4.743 km W of Talcahuano, Chile12.0 km2011-02-13 12:08:15 UTCView event →
M 5.523 km NW of Talcahuano, Chile18.9 km2011-02-13 13:44:36 UTCView event →
M 4.847 km NNW of Lebu, Chile10.0 km2011-02-13 16:41:24 UTCView event →
M 4.831 km NW of Lebu, Chile7.3 km2011-02-13 17:54:15 UTCView event →
M 6.738 km W of Constitución, Chile21.0 km2011-02-14 03:40:09 UTCView event →
M 5.082 km WSW of Constitución, Chile38.9 km2011-02-14 03:45:15 UTCView event →
M 4.619 km NW of Talcahuano, Chile11.9 km2011-02-14 04:56:52 UTCView event →
M 5.242 km W of Constitución, Chile34.1 km2011-02-14 10:21:27 UTCView event →
M 5.225 km W of San Javier, Chile35.0 km2011-02-14 12:18:30 UTCView event →
M 4.664 km W of Constitución, Chile35.0 km2011-02-14 12:20:03 UTCView event →
M 4.874 km WSW of San Antonio, Chile30.5 km2011-02-16 18:09:32 UTCView event →
M 5.359 km SW of San Antonio, Chile10.0 km2011-02-18 17:00:58 UTCView event →
M 4.863 km ESE of Chimbarongo, Chile17.7 km2011-02-18 23:54:03 UTCView event →
M 5.275 km SW of San Antonio, Chile15.9 km2011-02-19 06:26:31 UTCView event →
M 4.665 km NW of Tomé, Chile34.3 km2011-02-23 11:03:54 UTCView event →
M 5.179 km NW of Talcahuano, Chile33.0 km2011-02-24 04:36:48 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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