Sequence · 2012-10-09

M 6.6 · Observed seismic cluster · west of Macquarie Island

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 cluster5
M6+1
Analysis radius276 km
Observation window14 days
Largest secondary eventM 5.2
Quake Pulse

Sequence timeline

Within first 24 hours4
Within first 7 days5
Observed duration3.0 d
Gap from reference eventM 1.4
0 h3.0 d
Quake Pulse

Main-event impact

Shallow

39/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 6.6west of Macquarie Island10.0 km2012-10-09 12:32:09 UTCView event →
M 4.5Balleny Islands region10.0 km2012-10-09 17:52:50 UTCView event →
M 4.6Balleny Islands region10.0 km2012-10-09 20:56:30 UTCView event →
M 4.5west of Macquarie Island10.0 km2012-10-10 10:38:51 UTCView event →
M 5.2Balleny Islands region10.0 km2012-10-12 13:09:43 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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