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Sequence · 2010-06-12

M 7.5 · Observed seismic cluster · Nicobar Islands, India region

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 cluster29
M6+1
Analysis radius420 km
Observation window14 days
Largest secondary eventM 5.5
Quake Pulse · Major sequence

What the sequence shows

After the M 7.5 reference event, Quake Pulse counts 11 M4+ event(s) in the first 24 hours and 17 in the first 7 days. Fourteen-day M4.5+ activity is about 9.9× the average equivalent derived from the previous year. The largest secondary event is M 2.0 below the reference event.

92/100Sequence score
Events in the previous 24 h0
In the first hour1
In the first 24 hours11
In the first 7 days17
Within 14 days29
Peak one-hour count2

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 d76Average 14-day equivalent2.9Activity / baseline ratio9.9×

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 2.0Observed duration12.8 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
Nicobar Islands, India region · 420 kmInteractive 3D view of earthquakes within 420 km of Nicobar Islands, India region.Nicobar Islands, India regionM 4.7 · Nicobar Islands, India region · 18.2 kmM 5.2 · Nicobar Islands, India region · 23.3 kmM 4.9 · Nicobar Islands, India region · 34.8 kmM 4.9 · Nicobar Islands, India region · 28.3 kmM 5.0 · Nicobar Islands, India region · 17.1 kmM 4.5 · Nicobar Islands, India region · 50.8 kmM 5.2 · Nicobar Islands, India region · 12.9 kmM 4.7 · Nicobar Islands, India region · 52.1 kmM 5.2 · Nicobar Islands, India region · 10.7 kmM 4.5 · Nicobar Islands, India region · 22.9 kmM 4.7 · Nicobar Islands, India region · 25.9 km
Nicobar Islands, India region420 km11 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

480 Felt reports · Shallow

68/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 7.5Nicobar Islands, India region35.0 km2010-06-12 19:26:50 UTCView event →
M 4.7Nicobar Islands, India region35.0 km2010-06-12 20:12:25 UTCView event →
M 5.2Nicobar Islands, India region35.0 km2010-06-12 22:44:42 UTCView event →
M 4.9Nicobar Islands, India region22.1 km2010-06-12 22:57:59 UTCView event →
M 4.9Nicobar Islands, India region11.6 km2010-06-13 02:50:33 UTCView event →
M 5.0Nicobar Islands, India region37.3 km2010-06-13 04:01:07 UTCView event →
M 4.5Nicobar Islands, India region35.0 km2010-06-13 04:15:14 UTCView event →
M 5.2Nicobar Islands, India region35.0 km2010-06-13 06:26:04 UTCView event →
M 4.7Nicobar Islands, India region29.1 km2010-06-13 06:38:43 UTCView event →
M 5.2Nicobar Islands, India region27.7 km2010-06-13 07:05:35 UTCView event →
M 4.5Nicobar Islands, India region22.8 km2010-06-13 07:36:59 UTCView event →
M 4.7Nicobar Islands, India region35.0 km2010-06-13 07:37:35 UTCView event →
M 5.0Nicobar Islands, India region35.0 km2010-06-15 23:24:27 UTCView event →
M 4.6Nicobar Islands, India region18.6 km2010-06-16 01:29:42 UTCView event →
M 4.5Nicobar Islands, India region35.0 km2010-06-16 04:57:32 UTCView event →
M 4.8Nicobar Islands, India region26.5 km2010-06-16 12:10:45 UTCView event →
M 4.5Nicobar Islands, India region25.6 km2010-06-16 21:37:03 UTCView event →
M 4.6Nicobar Islands, India region35.0 km2010-06-18 12:42:48 UTCView event →
M 4.5Nicobar Islands, India region35.0 km2010-06-20 00:07:01 UTCView event →
M 4.5Nicobar Islands, India region13.7 km2010-06-20 02:10:31 UTCView event →
M 4.7112 km SSW of Banda Aceh, Indonesia53.8 km2010-06-21 14:08:37 UTCView event →
M 5.0Nicobar Islands, India region27.8 km2010-06-22 08:45:06 UTCView event →
M 5.5Nicobar Islands, India region20.5 km2010-06-24 04:08:35 UTCView event →
M 4.6Nicobar Islands, India region35.0 km2010-06-24 07:39:56 UTCView event →
M 4.6Nicobar Islands, India region25.3 km2010-06-24 17:05:59 UTCView event →
M 4.9Nicobar Islands, India region30.0 km2010-06-24 17:06:22 UTCView event →
M 5.0Nicobar Islands, India region26.1 km2010-06-24 18:07:46 UTCView event →
M 5.2Nicobar Islands, India region35.0 km2010-06-25 07:29:00 UTCView event →
M 4.8Nicobar Islands, India region20.8 km2010-06-25 07:48:15 UTCView event →
M 4.6Nicobar Islands, India region35.0 km2010-06-25 13:43:22 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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