Sequence · 2022-08-14

M 6.6 · Observed seismic cluster · south of the Kermadec Islands

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 cluster11
M6+1
Analysis radius276 km
Observation window14 days
Largest secondary eventM 5.2
Quake Pulse · Strong sequence

What the sequence shows

After the M 6.6 reference event, Quake Pulse counts 3 M4+ event(s) in the first 24 hours and 8 in the first 7 days. Fourteen-day M4.5+ activity is about 1.7× the average equivalent derived from the previous year. The largest secondary event is M 1.4 below the reference event.

69/100Sequence score
Events in the previous 24 h0
In the first hour2
In the first 24 hours3
In the first 7 days8
Within 14 days13
Peak one-hour count2

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 d205Average 14-day equivalent7.9Activity / baseline ratio1.7×

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 5.2Magnitude gapM 1.4Observed duration11.1 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.

south of the Kermadec Islands · 276 kmInteractive 3D view of earthquakes within 276 km of south of the Kermadec Islands.south of the Kermadec IslandsM 5.2 · Kermadec Islands, New Zealand · 220.4 kmM 4.9 · south of the Kermadec Islands · 16.2 kmM 4.9 · south of the Kermadec Islands · 6.3 km
south of the Kermadec Islands276 km3 Recent earthquakes

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

2 Felt reports · PAGER GREEN · Tsunami indicator · Shallow

58/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 6.6south of the Kermadec Islands30.0 km2022-08-14 13:44:19 UTCView event →
M 5.2Kermadec Islands, New Zealand10.0 km2022-08-14 13:48:27 UTCView event →
M 4.9south of the Kermadec Islands35.0 km2022-08-14 13:54:14 UTCView event →
M 4.9south of the Kermadec Islands38.2 km2022-08-15 03:54:40 UTCView event →
M 4.5south of the Kermadec Islands36.5 km2022-08-15 19:19:15 UTCView event →
M 4.6Kermadec Islands region10.0 km2022-08-16 03:46:24 UTCView event →
M 4.5Kermadec Islands region331.5 km2022-08-16 12:54:08 UTCView event →
M 4.6Kermadec Islands, New Zealand33.7 km2022-08-16 18:50:28 UTCView event →
M 4.6south of the Kermadec Islands21.2 km2022-08-16 19:24:11 UTCView event →
M 4.8Kermadec Islands region37.1 km2022-08-22 01:59:12 UTCView event →
M 4.7Kermadec Islands, New Zealand10.0 km2022-08-22 20:00:53 UTCView event →
M 4.5south of the Kermadec Islands134.3 km2022-08-23 11:08:28 UTCView event →
M 4.6Kermadec Islands region397.6 km2022-08-23 18:45:09 UTCView event →
M 4.8Kermadec Islands region37.0 km2022-08-25 15:41:02 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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