Sequence · 2016-04-16

M 7.8 · Observed seismic cluster · 27 km SSE of Muisne, Ecuador

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 cluster40
M6+4
Analysis radius468 km
Observation window14 days
Largest secondary eventM 6.2
Quake Pulse · Major sequence

What the sequence shows

After the M 7.8 reference event, Quake Pulse counts 12 M4+ event(s) in the first 24 hours and 37 in the first 7 days. Fourteen-day M4.5+ activity is about 35.1× the average equivalent derived from the previous year. The largest secondary event is M 1.6 below the reference event.

100/100Sequence score
Events in the previous 24 h1
In the first hour3
In the first 24 hours12
In the first 7 days37
Within 14 days39
Peak one-hour count3

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 d29Average 14-day equivalent1.1Activity / baseline ratio35.1×

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 6.2Magnitude gapM 1.6Observed duration9.9 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.

Detailed timeline

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

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

194 Felt reports · PAGER ORANGE · Tsunami indicator · Shallow

91/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 7.827 km SSE of Muisne, Ecuador20.6 km2016-04-16 23:58:36 UTCView event →
M 4.515 km S of Pedernales, Ecuador10.0 km2016-04-17 00:12:00 UTCView event →
M 4.717 km WSW of Pedernales, Ecuador10.0 km2016-04-17 00:16:00 UTCView event →
M 5.5near the coast of Ecuador15.5 km2016-04-17 00:29:31 UTCView event →
M 4.543 km NW of Pedernales, Ecuador10.0 km2016-04-17 00:59:04 UTCView event →
M 4.836 km NNE of Bahía de Caráquez, Ecuador10.0 km2016-04-17 02:18:01 UTCView event →
M 4.634 km NW of Pedernales, Ecuador10.0 km2016-04-17 03:05:33 UTCView event →
M 4.843 km NNW of Bahía de Caráquez, Ecuador10.0 km2016-04-17 04:02:08 UTCView event →
M 4.649 km WNW of Pedernales, Ecuador10.0 km2016-04-17 05:42:50 UTCView event →
M 5.834 km NE of Bahía de Caráquez, Ecuador24.0 km2016-04-17 07:14:00 UTCView event →
M 4.624 km NNE of Bahía de Caráquez, Ecuador10.0 km2016-04-17 07:22:25 UTCView event →
M 5.650 km NW of Bahía de Caráquez, Ecuador10.0 km2016-04-17 09:23:41 UTCView event →
M 4.512 km ESE of Muisne, Ecuador10.0 km2016-04-17 20:24:00 UTCView event →
M 4.939 km NNE of Bahía de Caráquez, Ecuador10.0 km2016-04-18 13:25:44 UTCView event →
M 4.528 km NNW of Bahía de Caráquez, Ecuador10.0 km2016-04-18 17:07:33 UTCView event →
M 4.915 km WSW of Manta, Ecuador10.0 km2016-04-18 18:38:10 UTCView event →
M 4.610 km W of Manta, Ecuador10.0 km2016-04-18 19:12:38 UTCView event →
M 4.970 km NNW of Bahía de Caráquez, Ecuador10.0 km2016-04-18 21:15:52 UTCView event →
M 4.957 km NW of Bahía de Caráquez, Ecuador10.0 km2016-04-19 02:03:14 UTCView event →
M 4.731 km WNW of Jipijapa, Ecuador10.0 km2016-04-19 17:12:53 UTCView event →
M 5.63 km S of Muisne, Ecuador11.0 km2016-04-19 22:22:25 UTCView event →
M 4.531 km W of Muisne, Ecuador19.5 km2016-04-20 08:25:07 UTCView event →
M 6.221 km W of Muisne, Ecuador14.0 km2016-04-20 08:33:47 UTCView event →
M 6.010 km N of Muisne, Ecuador10.0 km2016-04-20 08:35:10 UTCView event →
M 4.617 km SW of Muisne, Ecuador10.0 km2016-04-20 09:13:17 UTCView event →
M 4.723 km WNW of Muisne, Ecuador10.0 km2016-04-20 16:20:36 UTCView event →
M 4.737 km N of Bahía de Caráquez, Ecuador10.0 km2016-04-20 16:30:53 UTCView event →
M 4.911 km ESE of Muisne, Ecuador6.4 km2016-04-20 21:30:04 UTCView event →
M 4.846 km WNW of Bahía de Caráquez, Ecuador10.0 km2016-04-20 22:31:29 UTCView event →
M 6.034 km NNW of Bahía de Caráquez, Ecuador10.0 km2016-04-22 03:03:41 UTCView event →
M 5.936 km NNW of Bahía de Caráquez, Ecuador10.3 km2016-04-22 03:20:13 UTCView event →
M 5.023 km NW of Bahía de Caráquez, Ecuador10.0 km2016-04-22 04:31:34 UTCView event →
M 4.843 km NNW of Bahía de Caráquez, Ecuador10.0 km2016-04-22 08:52:20 UTCView event →
M 4.725 km NW of Baláo, Ecuador48.3 km2016-04-22 13:26:20 UTCView event →
M 4.854 km W of Bahía de Caráquez, Ecuador10.0 km2016-04-22 15:36:27 UTCView event →
M 4.948 km NW of Bahía de Caráquez, Ecuador10.0 km2016-04-22 15:39:05 UTCView event →
M 5.726 km W of Muisne, Ecuador10.0 km2016-04-23 01:24:33 UTCView event →
M 4.839 km W of Muisne, Ecuador10.0 km2016-04-23 04:06:33 UTCView event →
M 4.710 km SW of Manta, Ecuador10.0 km2016-04-25 21:15:53 UTCView event →
M 5.456 km NW of Bahía de Caráquez, Ecuador10.0 km2016-04-26 21:58:34 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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