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Sequence · 2014-04-03

M 7.7 · Observed seismic cluster · 53 km SW of Iquique, 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 cluster92
M6+4
Analysis radius452 km
Observation window14 days
Largest secondary eventM 6.4
Quake Pulse · Major sequence

What the sequence shows

After the M 7.7 reference event, Quake Pulse counts 44 M4+ event(s) in the first 24 hours and 75 in the first 7 days. Fourteen-day M4.5+ activity is about 9.4× the average equivalent derived from the previous year. The largest secondary event is M 1.3 below the reference event.

100/100Sequence score
Events in the previous 24 h40
In the first hour7
In the first 24 hours44
In the first 7 days75
Within 14 days94
Peak one-hour count7

Local historical context

Descriptive comparison with M4.5+ events observed in the same radius during the 365 days before the sequence.

M4.5+ events / 365 d260Average 14-day equivalent10.0Activity / baseline ratio9.4×

A ratio above 1 means denser M4.5+ activity than the average equivalent derived from the previous 365 days. It is not a risk measure or a forecast.

Reference event

Largest secondary eventM 6.4Magnitude gapM 1.3Observed duration13.0 d

Earlier events are shown as context only. They are not labelled precursors and should not be interpreted as predictive signals.

Evolving sequence map

Shows M4+ cluster events according to elapsed time after the reference event.

1 hour24 hours7 days14 days
53 km SW of Iquique, Chile · 452 kmInteractive 3D view of earthquakes within 452 km of 53 km SW of Iquique, Chile.53 km SW of Iquique, ChileM 4.8 · 46 km W of Iquique, Chile · 45.3 kmM 5.5 · 71 km SW of Iquique, Chile · 20.0 kmM 5.0 · 47 km SW of Iquique, Chile · 5.8 kmM 5.5 · 77 km SW of Iquique, Chile · 26.2 kmM 5.4 · 53 km SW of Iquique, Chile · 5.9 kmM 4.7 · 94 km SW of Iquique, Chile · 44.5 kmM 4.8 · 81 km SW of Iquique, Chile · 27.8 kmM 4.6 · 86 km SW of Iquique, Chile · 33.6 kmM 4.9 · 71 km WNW of Iquique, Chile · 78.0 kmM 4.7 · 59 km WSW of Iquique, Chile · 16.8 kmM 4.5 · 49 km WSW of Iquique, Chile · 28.7 kmM 5.2 · Near the coast of Tarapaca, Chile · 24.4 kmM 4.6 · 96 km NW of Iquique, Chile · 118.1 kmM 4.6 · 77 km SW of Iquique, Chile · 27.8 kmM 4.8 · 75 km SW of Iquique, Chile · 23.5 kmM 4.8 · 58 km W of Iquique, Chile · 36.8 kmM 4.9 · 102 km WNW of Iquique, Chile · 104.9 kmM 5.1 · 50 km SW of Iquique, Chile · 8.1 kmM 6.4 · 79 km SW of Iquique, Chile · 26.9 kmM 4.7 · 81 km SW of Iquique, Chile · 29.5 kmM 5.0 · 49 km WSW of Iquique, Chile · 14.3 kmM 5.3 · 66 km SSW of Iquique, Chile · 22.4 kmM 4.9 · 121 km ESE of Arica, Chile · 220.6 kmM 5.0 · 71 km SW of Iquique, Chile · 19.9 kmM 4.6 · 17 km SSE of Iquique, Chile · 49.5 kmM 4.5 · 71 km SW of Iquique, Chile · 18.8 kmM 4.8 · 79 km W of Iquique, Chile · 58.6 kmM 4.6 · 97 km WNW of Iquique, Chile · 93.6 kmM 4.5 · 95 km SW of Iquique, Chile · 42.7 kmM 4.5 · 29 km W of Iquique, Chile · 35.2 kmM 5.4 · 68 km WSW of Iquique, Chile · 23.7 kmM 4.6 · 98 km WSW of Iquique, Chile · 53.1 kmM 4.5 · 84 km WNW of Iquique, Chile · 92.7 kmM 4.9 · 83 km W of Iquique, Chile · 59.3 kmM 4.6 · 84 km WSW of Iquique, Chile · 36.0 kmM 4.5 · 51 km WSW of Iquique, Chile · 25.4 kmM 4.5 · 107 km WSW of Iquique, Chile · 57.1 kmM 4.8 · 87 km WSW of Iquique, Chile · 42.1 kmM 4.5 · Near the coast of Tarapaca, Chile · 42.0 kmM 4.9 · 87 km WSW of Iquique, Chile · 43.7 kmM 4.6 · 74 km SW of Iquique, Chile · 22.7 kmM 4.5 · 72 km WSW of Iquique, Chile · 25.9 kmM 4.7 · 52 km W of Iquique, Chile · 47.9 kmM 6.3 · 70 km SW of Iquique, Chile · 18.5 km
53 km SW of Iquique, Chile452 km44 Recent earthquakes

Detailed timeline

Dots represent M4+ events retained by the sequence detector. Dot size depends on magnitude.

0 h24 h7 d14 d

Sequences are descriptive groupings based on spatial and temporal proximity. Quake Pulse does not establish a causal link between every event here and does not provide earthquake forecasts.

Quake Pulse

Main-event impact

177 Felt reports · PAGER YELLOW · Tsunami indicator · Shallow

83/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 7.753 km SW of Iquique, Chile22.4 km2014-04-03 02:43:13 UTCView event →
M 4.846 km W of Iquique, Chile35.0 km2014-04-03 02:53:58 UTCView event →
M 5.571 km SW of Iquique, Chile10.0 km2014-04-03 02:56:05 UTCView event →
M 5.047 km SW of Iquique, Chile35.0 km2014-04-03 02:59:53 UTCView event →
M 5.577 km SW of Iquique, Chile10.0 km2014-04-03 03:11:14 UTCView event →
M 5.453 km SW of Iquique, Chile10.0 km2014-04-03 03:11:31 UTCView event →
M 4.794 km SW of Iquique, Chile10.0 km2014-04-03 03:20:43 UTCView event →
M 4.881 km SW of Iquique, Chile10.0 km2014-04-03 03:40:28 UTCView event →
M 4.686 km SW of Iquique, Chile10.0 km2014-04-03 03:45:09 UTCView event →
M 4.971 km WNW of Iquique, Chile19.9 km2014-04-03 03:45:53 UTCView event →
M 4.759 km WSW of Iquique, Chile10.0 km2014-04-03 04:00:56 UTCView event →
M 4.549 km WSW of Iquique, Chile10.0 km2014-04-03 04:04:43 UTCView event →
M 5.2Near the coast of Tarapaca, Chile10.0 km2014-04-03 04:17:55 UTCView event →
M 4.696 km NW of Iquique, Chile22.0 km2014-04-03 04:25:05 UTCView event →
M 4.677 km SW of Iquique, Chile32.6 km2014-04-03 04:35:29 UTCView event →
M 4.875 km SW of Iquique, Chile10.0 km2014-04-03 04:53:37 UTCView event →
M 4.858 km W of Iquique, Chile30.2 km2014-04-03 05:06:46 UTCView event →
M 4.9102 km WNW of Iquique, Chile21.0 km2014-04-03 05:17:11 UTCView event →
M 5.150 km SW of Iquique, Chile24.5 km2014-04-03 05:19:05 UTCView event →
M 6.479 km SW of Iquique, Chile25.0 km2014-04-03 05:26:15 UTCView event →
M 4.781 km SW of Iquique, Chile10.0 km2014-04-03 05:28:50 UTCView event →
M 5.049 km WSW of Iquique, Chile19.4 km2014-04-03 05:34:31 UTCView event →
M 5.366 km SSW of Iquique, Chile29.0 km2014-04-03 05:51:44 UTCView event →
M 4.9121 km ESE of Arica, Chile101.9 km2014-04-03 06:16:08 UTCView event →
M 5.071 km SW of Iquique, Chile15.8 km2014-04-03 06:54:31 UTCView event →
M 4.617 km SSE of Iquique, Chile46.5 km2014-04-03 06:56:50 UTCView event →
M 4.571 km SW of Iquique, Chile23.4 km2014-04-03 07:15:40 UTCView event →
M 4.879 km W of Iquique, Chile12.8 km2014-04-03 07:38:13 UTCView event →
M 4.697 km WNW of Iquique, Chile18.0 km2014-04-03 08:28:51 UTCView event →
M 4.595 km SW of Iquique, Chile16.8 km2014-04-03 08:37:39 UTCView event →
M 4.529 km W of Iquique, Chile10.0 km2014-04-03 09:08:55 UTCView event →
M 5.468 km WSW of Iquique, Chile19.0 km2014-04-03 09:23:22 UTCView event →
M 4.698 km WSW of Iquique, Chile15.0 km2014-04-03 09:47:57 UTCView event →
M 4.584 km WNW of Iquique, Chile10.0 km2014-04-03 09:48:42 UTCView event →
M 4.983 km W of Iquique, Chile10.0 km2014-04-03 11:41:37 UTCView event →
M 4.684 km WSW of Iquique, Chile10.0 km2014-04-03 11:59:49 UTCView event →
M 4.551 km WSW of Iquique, Chile10.0 km2014-04-03 13:23:22 UTCView event →
M 4.5107 km WSW of Iquique, Chile16.9 km2014-04-03 14:10:36 UTCView event →
M 4.887 km WSW of Iquique, Chile16.0 km2014-04-03 14:34:06 UTCView event →
M 4.5Near the coast of Tarapaca, Chile10.0 km2014-04-03 14:52:17 UTCView event →
M 4.987 km WSW of Iquique, Chile6.9 km2014-04-03 15:08:07 UTCView event →
M 4.674 km SW of Iquique, Chile21.8 km2014-04-03 20:27:09 UTCView event →
M 4.572 km WSW of Iquique, Chile8.5 km2014-04-03 20:39:04 UTCView event →
M 4.752 km W of Iquique, Chile26.0 km2014-04-03 23:37:51 UTCView event →
M 6.370 km SW of Iquique, Chile13.7 km2014-04-04 01:37:50 UTCView event →
M 4.714 km SW of Tocopilla, Chile61.5 km2014-04-04 04:34:28 UTCView event →
M 5.293 km W of Iquique, Chile10.8 km2014-04-04 09:38:55 UTCView event →
M 4.874 km SW of Iquique, Chile14.9 km2014-04-04 09:53:25 UTCView event →
M 4.539 km WNW of Iquique, Chile10.0 km2014-04-04 10:01:31 UTCView event →
M 4.887 km WNW of Iquique, Chile10.0 km2014-04-04 15:20:59 UTCView event →
M 4.885 km WSW of Iquique, Chile10.0 km2014-04-04 16:02:41 UTCView event →
M 4.672 km WNW of Iquique, Chile17.6 km2014-04-04 18:07:33 UTCView event →
M 4.661 km SW of Atico, Peru35.2 km2014-04-04 20:32:46 UTCView event →
M 4.943 km WNW of Iquique, Chile30.0 km2014-04-05 00:33:57 UTCView event →
M 5.080 km SW of Iquique, Chile22.0 km2014-04-05 04:05:03 UTCView event →
M 4.785 km WSW of Iquique, Chile18.5 km2014-04-05 04:08:52 UTCView event →
M 4.673 km SW of Iquique, Chile18.0 km2014-04-05 05:28:57 UTCView event →
M 5.242 km W of Iquique, Chile24.2 km2014-04-05 05:44:56 UTCView event →
M 4.677 km WNW of Iquique, Chile13.9 km2014-04-05 07:54:19 UTCView event →
M 4.877 km WSW of Iquique, Chile10.0 km2014-04-05 14:04:49 UTCView event →
M 5.292 km WSW of Iquique, Chile10.0 km2014-04-06 14:06:08 UTCView event →
M 4.596 km WSW of Iquique, Chile9.8 km2014-04-06 14:26:43 UTCView event →
M 4.693 km WSW of Iquique, Chile17.0 km2014-04-07 06:24:23 UTCView event →
M 4.589 km WSW of Iquique, Chile18.8 km2014-04-07 10:41:36 UTCView event →
M 5.773 km W of Iquique, Chile8.0 km2014-04-07 13:43:21 UTCView event →
M 5.467 km W of Iquique, Chile9.7 km2014-04-07 13:47:33 UTCView event →
M 5.178 km W of Iquique, Chile10.0 km2014-04-07 14:03:43 UTCView event →
M 4.562 km NW of Iquique, Chile27.6 km2014-04-08 01:03:02 UTCView event →
M 4.880 km WNW of Iquique, Chile17.7 km2014-04-08 05:20:21 UTCView event →
M 4.861 km SW of Iquique, Chile19.7 km2014-04-08 05:43:56 UTCView event →
M 5.687 km WSW of Iquique, Chile6.0 km2014-04-08 10:14:31 UTCView event →
M 4.997 km WNW of Iquique, Chile9.0 km2014-04-09 04:32:55 UTCView event →
M 4.537 km SSW of San Antonio de los Cobres, Argentina180.5 km2014-04-09 10:04:03 UTCView event →
M 4.693 km SW of Iquique, Chile13.7 km2014-04-09 11:06:14 UTCView event →
M 5.280 km WSW of Iquique, Chile9.9 km2014-04-09 11:14:43 UTCView event →
M 4.581 km WSW of Iquique, Chile7.1 km2014-04-10 00:10:31 UTCView event →
M 5.085 km WNW of Iquique, Chile13.3 km2014-04-10 17:49:10 UTCView event →
M 6.271 km SW of Iquique, Chile13.8 km2014-04-11 00:01:45 UTCView event →
M 4.984 km WSW of Iquique, Chile22.3 km2014-04-11 08:39:45 UTCView event →
M 4.982 km WNW of Iquique, Chile20.0 km2014-04-11 08:55:56 UTCView event →
M 4.581 km WSW of San Pedro de Atacama, Chile111.3 km2014-04-11 10:49:09 UTCView event →
M 5.045 km WNW of Iquique, Chile22.3 km2014-04-11 12:00:51 UTCView event →
M 4.693 km WSW of Abra Pampa, Argentina218.6 km2014-04-11 23:19:03 UTCView event →
M 4.656 km SSW of San Pedro de Atacama, Chile149.3 km2014-04-13 05:13:54 UTCView event →
M 4.6150 km N of Calama, Chile113.4 km2014-04-13 05:38:14 UTCView event →
M 5.573 km WSW of Iquique, Chile13.4 km2014-04-13 12:11:30 UTCView event →
M 5.188 km SW of Iquique, Chile14.9 km2014-04-14 05:56:17 UTCView event →
M 4.691 km WSW of Iquique, Chile10.0 km2014-04-14 13:35:41 UTCView event →
M 5.366 km W of Iquique, Chile17.6 km2014-04-15 16:09:34 UTCView event →
M 4.777 km W of Iquique, Chile10.7 km2014-04-15 16:17:10 UTCView event →
M 5.157 km W of Iquique, Chile15.4 km2014-04-15 16:21:17 UTCView event →
M 4.774 km W of Iquique, Chile11.4 km2014-04-15 17:12:18 UTCView event →
M 5.173 km W of Iquique, Chile15.0 km2014-04-15 18:59:40 UTCView event →
M 4.975 km W of Iquique, Chile11.0 km2014-04-16 03:14:09 UTCView event →
M 4.574 km W of Iquique, Chile9.2 km2014-04-16 03:19:32 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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