Sequence · 2007-12-20

M 6.6 · Observed seismic cluster · 46 km SSE of Gisborne, 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 cluster5
M6+1
Analysis radius276 km
Observation window14 days
Largest secondary eventM 5.2
Quake Pulse

Sequence timeline

Within first 24 hours2
Within first 7 days3
Observed duration8.4 d
Gap from reference eventM 1.4
0 h8.4 d
Quake Pulse

Main-event impact

198 Felt reports · Shallow

57/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 6.646 km SSE of Gisborne, New Zealand20.0 km2007-12-20 07:55:15 UTCView event →
M 4.549 km ESE of Gisborne, New Zealand56.0 km2007-12-20 17:47:10 UTCView event →
M 4.836 km ESE of Gisborne, New Zealand34.0 km2007-12-21 22:35:11 UTCView event →
M 5.212 km WNW of Turangi, New Zealand117.0 km2007-12-27 08:07:03 UTCView event →
M 5.021 km ESE of Taupo, New Zealand80.0 km2007-12-28 18:03:37 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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