Sequence · 2019-01-06

M 6.6 · Observed seismic cluster · Molucca Sea

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 cluster43
M6+1
Analysis radius276 km
Observation window14 days
Largest secondary eventM 5.5
Quake Pulse · Major sequence

What the sequence shows

After the M 6.6 reference event, Quake Pulse counts 23 M4+ event(s) in the first 24 hours and 30 in the first 7 days. Fourteen-day M4.5+ activity is about 5.9× the average equivalent derived from the previous year. The largest secondary event is M 1.1 below the reference event.

75/100Sequence score
Events in the previous 24 h0
In the first hour8
In the first 24 hours23
In the first 7 days30
Within 14 days42
Peak one-hour count8

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 d186Average 14-day equivalent7.1Activity / baseline ratio5.9×

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 5.5Magnitude gapM 1.1Observed duration12.9 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

10 Felt reports · PAGER GREEN · Tsunami indicator · Shallow

57/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 6.6Molucca Sea43.2 km2019-01-06 17:27:18 UTCView event →
M 5.2160 km WNW of Tobelo, Indonesia19.8 km2019-01-06 17:33:11 UTCView event →
M 4.7149 km WNW of Tobelo, Indonesia52.6 km2019-01-06 17:57:23 UTCView event →
M 4.5Molucca Sea48.6 km2019-01-06 18:00:46 UTCView event →
M 4.9159 km WNW of Tobelo, Indonesia47.8 km2019-01-06 18:01:43 UTCView event →
M 4.6140 km WNW of Tobelo, Indonesia35.0 km2019-01-06 18:12:07 UTCView event →
M 4.9156 km WNW of Tobelo, Indonesia55.1 km2019-01-06 18:14:34 UTCView event →
M 5.1151 km WNW of Tobelo, Indonesia52.5 km2019-01-06 18:18:09 UTCView event →
M 5.1150 km WNW of Tobelo, Indonesia49.2 km2019-01-06 18:25:28 UTCView event →
M 4.7147 km WNW of Tobelo, Indonesia49.8 km2019-01-06 18:35:35 UTCView event →
M 4.6149 km NW of Tobelo, Indonesia35.0 km2019-01-06 18:57:47 UTCView event →
M 5.0167 km WNW of Tobelo, Indonesia35.0 km2019-01-06 19:16:02 UTCView event →
M 5.0147 km WNW of Tobelo, Indonesia43.4 km2019-01-06 20:06:27 UTCView event →
M 4.5159 km WNW of Tobelo, Indonesia43.2 km2019-01-06 20:23:52 UTCView event →
M 4.7106 km NW of Tobelo, Indonesia54.6 km2019-01-06 20:31:41 UTCView event →
M 4.6149 km WNW of Tobelo, Indonesia35.0 km2019-01-06 21:07:31 UTCView event →
M 4.7155 km WNW of Tobelo, Indonesia35.0 km2019-01-06 21:27:31 UTCView event →
M 4.9153 km WNW of Tobelo, Indonesia35.0 km2019-01-06 21:32:59 UTCView event →
M 4.5145 km WNW of Tobelo, Indonesia41.8 km2019-01-07 04:03:21 UTCView event →
M 4.5154 km WNW of Tobelo, Indonesia41.4 km2019-01-07 04:12:13 UTCView event →
M 4.6Molucca Sea35.0 km2019-01-07 07:20:44 UTCView event →
M 4.6157 km WNW of Tobelo, Indonesia35.0 km2019-01-07 07:48:57 UTCView event →
M 5.2157 km WNW of Tobelo, Indonesia39.9 km2019-01-07 14:11:52 UTCView event →
M 4.8154 km WNW of Tobelo, Indonesia53.1 km2019-01-07 14:40:02 UTCView event →
M 4.5143 km WNW of Tobelo, Indonesia35.0 km2019-01-11 03:35:31 UTCView event →
M 4.8137 km NW of Tobelo, Indonesia35.0 km2019-01-11 09:01:25 UTCView event →
M 4.5152 km WNW of Tobelo, Indonesia68.2 km2019-01-11 19:12:00 UTCView event →
M 5.2220 km NNE of Tobelo, Indonesia10.0 km2019-01-13 01:16:18 UTCView event →
M 5.0230 km NNE of Tobelo, Indonesia10.0 km2019-01-13 01:20:16 UTCView event →
M 4.6229 km NNE of Tobelo, Indonesia10.0 km2019-01-13 02:55:58 UTCView event →
M 4.6146 km WNW of Tobelo, Indonesia58.4 km2019-01-13 12:27:00 UTCView event →
M 4.8107 km W of Ternate, Indonesia40.7 km2019-01-13 21:19:36 UTCView event →
M 4.5166 km NW of Tobelo, Indonesia35.0 km2019-01-13 22:57:41 UTCView event →
M 4.6141 km NW of Ternate, Indonesia43.0 km2019-01-14 03:24:20 UTCView event →
M 4.5206 km NNE of Tobelo, Indonesia10.0 km2019-01-14 04:01:09 UTCView event →
M 5.5206 km NNE of Tobelo, Indonesia11.0 km2019-01-16 10:49:27 UTCView event →
M 5.1217 km NNE of Tobelo, Indonesia10.0 km2019-01-16 10:53:15 UTCView event →
M 4.9164 km SSE of Sarangani, Philippines133.5 km2019-01-17 15:14:41 UTCView event →
M 4.6217 km NNE of Tobelo, Indonesia10.0 km2019-01-17 23:11:31 UTCView event →
M 4.9216 km NNE of Tobelo, Indonesia10.0 km2019-01-18 15:38:18 UTCView event →
M 5.2192 km NNE of Tobelo, Indonesia12.3 km2019-01-18 18:51:59 UTCView event →
M 4.6213 km NNE of Tobelo, Indonesia10.0 km2019-01-19 11:12:59 UTCView event →
M 5.0159 km WNW of Tobelo, Indonesia48.3 km2019-01-19 14:03:01 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.

Blog

Latest from the blog

Guides, explainers and practical reading to go beyond the live data.

View all articles →