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Sequence · 2011-10-28

M 6.9 · Observed seismic cluster · 39 km SW of Santiago, Peru

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 cluster19
M6+1
Analysis radius324 km
Observation window14 days
Largest secondary eventM 5.6
Quake Pulse

Sequence timeline

Within first 24 hours14
Within first 7 days18
Observed duration9.7 d
Gap from reference eventM 1.3
0 h9.7 d
Quake Pulse

Main-event impact

185 Felt reports · Shallow

62/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 6.939 km SW of Santiago, Peru24.0 km2011-10-28 18:54:34 UTCView event →
M 5.637 km SW of Santiago, Peru22.3 km2011-10-28 19:01:02 UTCView event →
M 5.054 km SW of Santiago, Peru8.2 km2011-10-28 19:10:33 UTCView event →
M 4.849 km WSW of Santiago, Peru15.0 km2011-10-28 20:26:48 UTCView event →
M 4.957 km SW of Santiago, Peru17.3 km2011-10-28 21:51:57 UTCView event →
M 5.062 km SSW of Santiago, Peru25.9 km2011-10-28 22:00:04 UTCView event →
M 5.638 km SSW of Santiago, Peru10.0 km2011-10-28 23:46:01 UTCView event →
M 4.835 km SW of Santiago, Peru37.7 km2011-10-29 00:48:58 UTCView event →
M 4.560 km SSW of Santiago, Peru37.5 km2011-10-29 01:37:49 UTCView event →
M 4.761 km SSW of Santiago, Peru26.5 km2011-10-29 04:23:37 UTCView event →
M 4.853 km SW of Santiago, Peru26.9 km2011-10-29 05:26:03 UTCView event →
M 4.862 km SW of Santiago, Peru25.7 km2011-10-29 05:33:45 UTCView event →
M 4.864 km SSW of Santiago, Peru18.4 km2011-10-29 08:31:05 UTCView event →
M 4.576 km S of Paracas, Peru10.0 km2011-10-29 17:14:29 UTCView event →
M 4.724 km SW of Santiago, Peru46.5 km2011-10-30 10:58:01 UTCView event →
M 4.778 km SW of Santiago, Peru9.8 km2011-10-31 20:35:09 UTCView event →
M 4.588 km SW of Santiago, Peru1.5 km2011-11-01 17:30:15 UTCView event →
M 4.861 km S of Paracas, Peru33.8 km2011-11-02 02:06:23 UTCView event →
M 4.772 km W of Paracas, Peru33.5 km2011-11-07 10:36:38 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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