Sequence · 2023-12-07

M 7.1 · Observed seismic cluster · 118 km S of Isangel, Vanuatu

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 cluster15
M6+1
Analysis radius356 km
Observation window14 days
Largest secondary eventM 5.6
Quake Pulse · Major sequence

What the sequence shows

After the M 7.1 reference event, Quake Pulse counts 1 M4+ event(s) in the first 24 hours and 10 in the first 7 days. Fourteen-day M4.5+ activity is about 1.4× the average equivalent derived from the previous year. The largest secondary event is M 1.5 below the reference event.

79/100Sequence score
Events in the previous 24 h0
In the first hour0
In the first 24 hours1
In the first 7 days10
Within 14 days15
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 d284Average 14-day equivalent10.9Activity / baseline ratio1.4×

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 5.6Magnitude gapM 1.5Observed duration12.0 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.

118 km S of Isangel, Vanuatu · 356 kmInteractive 3D view of earthquakes within 356 km of 118 km S of Isangel, Vanuatu.118 km S of Isangel, VanuatuM 5.6 · 93 km S of Isangel, Vanuatu · 30.1 km
118 km S of Isangel, Vanuatu356 km1 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

17 Felt reports · PAGER GREEN · Tsunami indicator · Shallow

69/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 7.1118 km S of Isangel, Vanuatu48.0 km2023-12-07 12:56:30 UTCView event →
M 5.693 km S of Isangel, Vanuatu48.5 km2023-12-08 07:19:56 UTCView event →
M 5.2146 km ENE of Tadine, New Caledonia10.0 km2023-12-08 16:19:29 UTCView event →
M 4.6116 km ENE of Tadine, New Caledonia10.0 km2023-12-08 16:51:20 UTCView event →
M 4.597 km S of Isangel, Vanuatu11.6 km2023-12-08 17:39:45 UTCView event →
M 5.2109 km SSW of Isangel, Vanuatu15.3 km2023-12-08 19:03:34 UTCView event →
M 4.5104 km SSW of Isangel, Vanuatu10.0 km2023-12-09 01:49:40 UTCView event →
M 4.7130 km SSW of Isangel, Vanuatu10.0 km2023-12-09 19:45:58 UTCView event →
M 4.8southeast of the Loyalty Islands123.5 km2023-12-11 22:46:17 UTCView event →
M 4.7280 km ESE of Tadine, New Caledonia21.0 km2023-12-12 10:57:21 UTCView event →
M 5.1121 km S of Isangel, Vanuatu35.0 km2023-12-13 03:04:18 UTCView event →
M 4.5127 km ENE of Tadine, New Caledonia10.0 km2023-12-15 16:43:48 UTCView event →
M 4.5southeast of the Loyalty Islands10.0 km2023-12-15 23:55:12 UTCView event →
M 5.6132 km E of Tadine, New Caledonia8.0 km2023-12-17 07:37:57 UTCView event →
M 5.3southeast of the Loyalty Islands10.0 km2023-12-19 02:42:29 UTCView event →
M 5.1240 km ESE of Tadine, New Caledonia10.0 km2023-12-19 11:53:51 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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