Sequence · 2001-01-26

M 7.7 · Observed seismic cluster · 17 km NW of Bhach?u, India

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 cluster32
M6+1
Analysis radius452 km
Observation window14 days
Largest secondary eventM 5.8
Quake Pulse · Major sequence

What the sequence shows

After the M 7.7 reference event, Quake Pulse counts 14 M4+ event(s) in the first 24 hours and 26 in the first 7 days. Fourteen-day M4.5+ activity is about 62.0× the average equivalent derived from the previous year. The largest secondary event is M 1.9 below the reference event.

90/100Sequence score
Events in the previous 24 h0
In the first hour2
In the first 24 hours14
In the first 7 days26
Within 14 days31
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 d3Average 14-day equivalent0.1Activity / baseline ratio62.0×

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 5.8Magnitude gapM 1.9Observed duration13.6 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

Shallow

58/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 7.717 km NW of Bhach?u, India16.0 km2001-01-26 03:16:40 UTCView event →
M 5.317 km E of Bhuj, India10.0 km2001-01-26 03:33:29 UTCView event →
M 4.917 km NNW of Anj?r, India10.0 km2001-01-26 03:58:59 UTCView event →
M 5.218 km NNW of Anj?r, India10.0 km2001-01-26 04:23:41 UTCView event →
M 5.15 km S of Bhach?u, India10.0 km2001-01-26 04:48:14 UTCView event →
M 4.624 km NW of R?par, India10.0 km2001-01-26 04:52:59 UTCView event →
M 4.88 km NE of Bhach?u, India10.0 km2001-01-26 05:59:06 UTCView event →
M 4.923 km NNW of Bhach?u, India10.0 km2001-01-26 06:04:51 UTCView event →
M 5.522 km NNW of Anj?r, India10.0 km2001-01-26 07:32:28 UTCView event →
M 4.724 km S of R?par, India10.0 km2001-01-26 07:48:54 UTCView event →
M 4.627 km NW of Bhach?u, India10.0 km2001-01-26 08:03:16 UTCView event →
M 4.723 km N of Halvad, India10.0 km2001-01-26 08:42:25 UTCView event →
M 4.816 km WSW of Bhach?u, India10.0 km2001-01-26 09:08:22 UTCView event →
M 4.817 km WSW of Bhach?u, India10.0 km2001-01-26 15:10:57 UTCView event →
M 4.724 km W of R?par, India10.0 km2001-01-26 18:19:44 UTCView event →
M 4.722 km NNW of Bhach?u, India10.0 km2001-01-27 03:50:01 UTCView event →
M 4.852 km NW of Bhach?u, India10.0 km2001-01-27 04:36:08 UTCView event →
M 4.611 km ESE of Bhach?u, India10.0 km2001-01-27 11:24:21 UTCView event →
M 5.815 km WSW of R?par, India10.0 km2001-01-28 01:02:10 UTCView event →
M 5.46 km SE of Bhach?u, India10.0 km2001-01-28 11:10:43 UTCView event →
M 4.714 km WNW of Anj?r, India10.0 km2001-01-28 17:15:22 UTCView event →
M 4.838 km NE of Bhuj, India10.0 km2001-01-29 01:39:03 UTCView event →
M 4.821 km WSW of R?par, India10.0 km2001-01-29 09:38:44 UTCView event →
M 4.816 km NNW of Bhach?u, India10.0 km2001-01-29 23:54:58 UTCView event →
M 4.77 km WSW of Bhach?u, India10.0 km2001-01-30 18:19:56 UTCView event →
M 4.911 km NE of Bhach?u, India10.0 km2001-01-31 09:42:22 UTCView event →
M 4.625 km NW of Bhach?u, India10.0 km2001-02-01 22:29:34 UTCView event →
M 5.323 km WNW of R?par, India10.0 km2001-02-03 03:04:32 UTCView event →
M 4.511 km NNE of Anj?r, India10.0 km2001-02-03 10:06:36 UTCView event →
M 4.532 km NW of Bhach?u, India10.0 km2001-02-04 04:47:24 UTCView event →
M 4.738 km NW of Bhach?u, India10.0 km2001-02-05 02:59:36 UTCView event →
M 5.124 km WNW of R?par, India10.0 km2001-02-08 16:54:41 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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