Sequence · 2012-01-10

M 7.2 · Observed seismic cluster · off the west coast of northern Sumatra

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 cluster19
M6+1
Analysis radius372 km
Observation window14 days
Largest secondary eventM 5.1
Quake Pulse

Sequence timeline

Within first 24 hours13
Within first 7 days16
Observed duration11.3 d
Gap from reference eventM 2.1
0 h11.3 d
Quake Pulse

Main-event impact

81 Felt reports · Shallow

62/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 7.2off the west coast of northern Sumatra19.0 km2012-01-10 18:36:59 UTCView event →
M 5.1off the west coast of northern Sumatra10.0 km2012-01-10 18:52:09 UTCView event →
M 4.7291 km W of Sinabang, Indonesia10.0 km2012-01-10 18:54:51 UTCView event →
M 4.9off the west coast of northern Sumatra10.0 km2012-01-10 19:02:39 UTCView event →
M 4.8off the west coast of northern Sumatra10.0 km2012-01-10 19:22:20 UTCView event →
M 4.6off the west coast of northern Sumatra10.0 km2012-01-10 19:46:15 UTCView event →
M 4.7off the west coast of northern Sumatra10.0 km2012-01-10 19:58:13 UTCView event →
M 4.9off the west coast of northern Sumatra10.0 km2012-01-10 21:00:51 UTCView event →
M 4.9off the west coast of northern Sumatra22.2 km2012-01-11 03:34:08 UTCView event →
M 4.9off the west coast of northern Sumatra10.0 km2012-01-11 08:22:25 UTCView event →
M 4.7off the west coast of northern Sumatra6.5 km2012-01-11 11:56:03 UTCView event →
M 4.6off the west coast of northern Sumatra10.0 km2012-01-11 12:43:51 UTCView event →
M 4.5off the west coast of northern Sumatra11.9 km2012-01-11 16:53:17 UTCView event →
M 4.9off the west coast of northern Sumatra13.8 km2012-01-13 04:34:11 UTCView event →
M 5.114 km SW of Sinabang, Indonesia39.6 km2012-01-13 20:03:46 UTCView event →
M 4.7125 km SSW of Banda Aceh, Indonesia57.9 km2012-01-15 14:52:03 UTCView event →
M 4.8off the west coast of northern Sumatra10.0 km2012-01-19 07:29:26 UTCView event →
M 4.6off the west coast of northern Sumatra10.0 km2012-01-19 20:50:34 UTCView event →
M 4.857 km SW of Sinabang, Indonesia24.6 km2012-01-22 00:55:36 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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