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Sequence · 2015-09-21

M 6.6 · Observed seismic cluster · 22 km WSW of Illapel, 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 cluster52
M6+3
Analysis radius276 km
Observation window14 days
Largest secondary eventM 6.3
Quake Pulse

Sequence timeline

Within first 24 hours10
Within first 7 days34
Observed duration14.0 d
Gap from reference eventM 0.3
0 h14.0 d
Quake Pulse

Main-event impact

283 Felt reports · PAGER GREEN · Tsunami indicator · Shallow

68/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 6.622 km WSW of Illapel, Chile35.0 km2015-09-21 17:40:00 UTCView event →
M 4.564 km SW of Ovalle, Chile33.0 km2015-09-21 18:08:04 UTCView event →
M 4.7Off the coast of Coquimbo, Chile8.9 km2015-09-21 18:17:45 UTCView event →
M 5.577 km SW of Ovalle, Chile27.0 km2015-09-21 18:36:53 UTCView event →
M 4.746 km WSW of Illapel, Chile37.6 km2015-09-21 18:47:07 UTCView event →
M 5.647 km WSW of Illapel, Chile28.4 km2015-09-21 19:56:08 UTCView event →
M 4.899 km WSW of Illapel, Chile10.0 km2015-09-21 20:24:32 UTCView event →
M 4.5104 km WNW of Coquimbo, Chile10.0 km2015-09-21 20:59:37 UTCView event →
M 4.8110 km WNW of La Ligua, Chile10.0 km2015-09-22 07:03:55 UTCView event →
M 6.022 km NNW of Illapel, Chile58.0 km2015-09-22 07:13:00 UTCView event →
M 4.782 km WSW of Ovalle, Chile20.1 km2015-09-22 20:46:00 UTCView event →
M 4.6156 km WNW of Illapel, Chile10.0 km2015-09-23 02:01:39 UTCView event →
M 4.680 km WNW of Illapel, Chile11.4 km2015-09-23 04:21:27 UTCView event →
M 4.576 km W of Illapel, Chile10.0 km2015-09-23 10:05:49 UTCView event →
M 5.074 km W of Illapel, Chile10.0 km2015-09-23 11:32:40 UTCView event →
M 4.5137 km WSW of Coquimbo, Chile10.0 km2015-09-24 07:56:10 UTCView event →
M 4.744 km W of Illapel, Chile35.0 km2015-09-24 13:35:54 UTCView event →
M 4.7Off the coast of Valparaiso, Chile10.0 km2015-09-24 14:39:43 UTCView event →
M 5.222 km SW of Ovalle, Chile41.0 km2015-09-24 16:13:25 UTCView event →
M 4.536 km WSW of Ovalle, Chile40.1 km2015-09-24 16:25:24 UTCView event →
M 4.590 km W of Illapel, Chile6.6 km2015-09-24 17:21:26 UTCView event →
M 4.551 km SW of Ovalle, Chile38.8 km2015-09-24 18:20:30 UTCView event →
M 4.587 km W of Ovalle, Chile12.8 km2015-09-24 22:36:16 UTCView event →
M 4.771 km W of Illapel, Chile11.6 km2015-09-25 11:47:06 UTCView event →
M 4.785 km W of Ovalle, Chile11.1 km2015-09-25 20:30:58 UTCView event →
M 6.326 km SSW of Ovalle, Chile46.0 km2015-09-26 02:51:18 UTCView event →
M 5.038 km WSW of Ovalle, Chile29.0 km2015-09-26 03:03:20 UTCView event →
M 4.576 km W of Ovalle, Chile18.9 km2015-09-26 07:55:32 UTCView event →
M 4.587 km WSW of Illapel, Chile24.4 km2015-09-26 11:15:29 UTCView event →
M 4.526 km SW of Ovalle, Chile34.4 km2015-09-27 16:25:58 UTCView event →
M 5.450 km W of Illapel, Chile36.9 km2015-09-27 21:04:45 UTCView event →
M 4.674 km NW of Illapel, Chile23.6 km2015-09-27 22:39:58 UTCView event →
M 4.8109 km W of Illapel, Chile10.9 km2015-09-28 06:05:43 UTCView event →
M 4.556 km W of Illapel, Chile13.9 km2015-09-28 08:29:13 UTCView event →
M 4.6Off the coast of Valparaiso, Chile14.8 km2015-09-29 13:42:44 UTCView event →
M 4.646 km W of Ovalle, Chile27.4 km2015-09-30 02:00:04 UTCView event →
M 4.729 km WSW of Ovalle, Chile38.3 km2015-10-01 02:06:22 UTCView event →
M 4.667 km WSW of Coquimbo, Chile14.3 km2015-10-01 02:25:54 UTCView event →
M 4.553 km WNW of Valparaíso, Chile10.0 km2015-10-01 14:31:10 UTCView event →
M 4.553 km SW of Ovalle, Chile31.0 km2015-10-02 07:43:21 UTCView event →
M 4.5155 km W of Illapel, Chile10.0 km2015-10-02 07:54:20 UTCView event →
M 4.582 km NW of La Ligua, Chile35.0 km2015-10-02 14:48:16 UTCView event →
M 4.938 km W of Ovalle, Chile32.5 km2015-10-02 16:22:47 UTCView event →
M 4.9162 km WSW of Ovalle, Chile10.0 km2015-10-02 16:33:27 UTCView event →
M 5.943 km SSW of Coquimbo, Chile38.0 km2015-10-03 06:26:55 UTCView event →
M 4.541 km NW of Ovalle, Chile39.4 km2015-10-03 08:26:56 UTCView event →
M 4.5107 km W of Illapel, Chile9.9 km2015-10-03 11:01:46 UTCView event →
M 5.140 km WNW of Coquimbo, Chile28.5 km2015-10-03 11:21:01 UTCView event →
M 5.583 km WSW of Coquimbo, Chile5.9 km2015-10-04 03:49:49 UTCView event →
M 5.041 km W of Ovalle, Chile29.9 km2015-10-04 10:11:56 UTCView event →
M 5.943 km SSW of Coquimbo, Chile34.0 km2015-10-05 16:33:26 UTCView event →
M 4.6157 km WSW of Ovalle, Chile10.0 km2015-10-05 17:30:53 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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