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Sequence · 2013-08-16

M 6.5 · Observed seismic cluster · 29 km SE of Blenheim, New Zealand

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 cluster23
M6+1
Analysis radius260 km
Observation window14 days
Largest secondary eventM 5.9
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Sequence timeline

Within first 24 hours19
Within first 7 days22
Observed duration7.3 d
Gap from reference eventM 0.6
0 h7.3 d
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Main-event impact

46 Felt reports · PAGER YELLOW · Tsunami indicator · Shallow

69/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 6.529 km SE of Blenheim, New Zealand8.2 km2013-08-16 02:31:05 UTCView event →
M 5.425 km SSE of Blenheim, New Zealand9.0 km2013-08-16 02:37:27 UTCView event →
M 5.530 km SSE of Blenheim, New Zealand5.8 km2013-08-16 02:45:27 UTCView event →
M 4.531 km ESE of Blenheim, New Zealand5.1 km2013-08-16 02:49:54 UTCView event →
M 4.927 km ESE of Blenheim, New Zealand8.5 km2013-08-16 02:56:27 UTCView event →
M 4.529 km SE of Blenheim, New Zealand5.3 km2013-08-16 03:06:13 UTCView event →
M 5.926 km SSE of Blenheim, New Zealand8.5 km2013-08-16 03:09:08 UTCView event →
M 4.627 km SSE of Blenheim, New Zealand5.1 km2013-08-16 03:15:06 UTCView event →
M 5.130 km SSE of Blenheim, New Zealand17.3 km2013-08-16 03:21:31 UTCView event →
M 4.536 km ESE of Blenheim, New Zealand16.6 km2013-08-16 03:26:50 UTCView event →
M 5.127 km SE of Blenheim, New Zealand19.4 km2013-08-16 03:51:35 UTCView event →
M 4.627 km SSE of Blenheim, New Zealand21.1 km2013-08-16 05:26:39 UTCView event →
M 5.930 km ESE of Blenheim, New Zealand14.3 km2013-08-16 05:31:16 UTCView event →
M 4.8Cook Strait, New Zealand5.1 km2013-08-16 05:57:52 UTCView event →
M 5.030 km SE of Blenheim, New Zealand17.5 km2013-08-16 05:58:28 UTCView event →
M 4.534 km SE of Blenheim, New Zealand20.1 km2013-08-16 06:42:40 UTCView event →
M 5.033 km ESE of Blenheim, New Zealand19.6 km2013-08-16 06:55:58 UTCView event →
M 4.728 km SSE of Blenheim, New Zealand21.8 km2013-08-16 08:38:54 UTCView event →
M 4.634 km ESE of Blenheim, New Zealand16.9 km2013-08-16 14:47:02 UTCView event →
M 4.829 km S of Blenheim, New Zealand19.7 km2013-08-17 04:13:20 UTCView event →
M 5.229 km SSE of Blenheim, New Zealand19.6 km2013-08-17 08:58:39 UTCView event →
M 4.631 km SSE of Blenheim, New Zealand18.9 km2013-08-17 16:07:52 UTCView event →
M 4.595 km S of Wakefield, New Zealand57.1 km2013-08-23 09:43:17 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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