Sequence · 2024-03-23

M 6.9 · Observed seismic cluster · 36 km ENE of Ambunti, Papua New Guinea

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 cluster13
M6+1
Analysis radius324 km
Observation window14 days
Largest secondary eventM 5.2
Quake Pulse · Major sequence

What the sequence shows

After the M 6.9 reference event, Quake Pulse counts 7 M4+ event(s) in the first 24 hours and 12 in the first 7 days. Fourteen-day M4.5+ activity is about 3.7× the average equivalent derived from the previous year. The largest secondary event is M 1.7 below the reference event.

75/100Sequence score
Events in the previous 24 h0
In the first hour4
In the first 24 hours7
In the first 7 days12
Within 14 days13
Peak one-hour count4

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 d92Average 14-day equivalent3.5Activity / baseline ratio3.7×

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 1.7Observed duration13.7 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.

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

29 Felt reports · PAGER GREEN · Tsunami indicator · Shallow

69/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 6.936 km ENE of Ambunti, Papua New Guinea41.5 km2024-03-23 20:22:04 UTCView event →
M 4.854 km SW of Wewak, Papua New Guinea35.0 km2024-03-23 20:32:23 UTCView event →
M 4.838 km ENE of Ambunti, Papua New Guinea35.0 km2024-03-23 20:33:20 UTCView event →
M 5.055 km ENE of Ambunti, Papua New Guinea35.0 km2024-03-23 20:40:29 UTCView event →
M 4.539 km ENE of Ambunti, Papua New Guinea35.0 km2024-03-23 20:51:05 UTCView event →
M 5.138 km ENE of Ambunti, Papua New Guinea35.0 km2024-03-23 22:49:58 UTCView event →
M 4.529 km NE of Ambunti, Papua New Guinea35.0 km2024-03-24 00:17:06 UTCView event →
M 5.237 km ENE of Ambunti, Papua New Guinea35.0 km2024-03-24 03:26:40 UTCView event →
M 4.514 km ENE of Ambunti, Papua New Guinea73.2 km2024-03-26 10:15:25 UTCView event →
M 5.115 km SE of Madang, Papua New Guinea69.8 km2024-03-26 17:49:35 UTCView event →
M 4.532 km ENE of Ambunti, Papua New Guinea69.1 km2024-03-26 23:33:09 UTCView event →
M 4.932 km NNE of Ambunti, Papua New Guinea35.0 km2024-03-27 03:03:59 UTCView event →
M 4.649 km ENE of Ambunti, Papua New Guinea35.0 km2024-03-30 04:10:02 UTCView event →
M 5.022 km NNE of Ambunti, Papua New Guinea63.3 km2024-04-06 12:25:42 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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