Sequence · 2023-01-08

M 7.0 · Observed seismic cluster · 23 km WNW of Port-Olry, 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 cluster41
M6+1
Analysis radius340 km
Observation window14 days
Largest secondary eventM 5.8
Quake Pulse · Major sequence

What the sequence shows

After the M 7.0 reference event, Quake Pulse counts 19 M4+ event(s) in the first 24 hours and 37 in the first 7 days. Fourteen-day M4.5+ activity is about 8.0× the average equivalent derived from the previous year. The largest secondary event is M 1.2 below the reference event.

85/100Sequence score
Events in the previous 24 h0
In the first hour7
In the first 24 hours19
In the first 7 days37
Within 14 days41
Peak one-hour count7

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 d134Average 14-day equivalent5.1Activity / baseline ratio8.0×

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 5.8Magnitude gapM 1.2Observed duration10.8 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

17 Felt reports · PAGER GREEN · Tsunami indicator · Shallow

70/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 7.023 km WNW of Port-Olry, Vanuatu29.0 km2023-01-08 12:32:42 UTCView event →
M 4.829 km WNW of Port-Olry, Vanuatu35.0 km2023-01-08 12:40:23 UTCView event →
M 4.845 km W of Port-Olry, Vanuatu34.6 km2023-01-08 12:49:04 UTCView event →
M 4.740 km W of Port-Olry, Vanuatu28.3 km2023-01-08 12:59:04 UTCView event →
M 4.829 km W of Port-Olry, Vanuatu35.0 km2023-01-08 13:02:32 UTCView event →
M 4.837 km WSW of Port-Olry, Vanuatu35.0 km2023-01-08 13:03:50 UTCView event →
M 4.728 km WSW of Port-Olry, Vanuatu35.0 km2023-01-08 13:14:57 UTCView event →
M 4.817 km WSW of Port-Olry, Vanuatu35.0 km2023-01-08 13:24:30 UTCView event →
M 4.523 km WSW of Port-Olry, Vanuatu35.0 km2023-01-08 13:35:03 UTCView event →
M 4.740 km WSW of Port-Olry, Vanuatu39.2 km2023-01-08 13:50:08 UTCView event →
M 4.831 km W of Port-Olry, Vanuatu35.0 km2023-01-08 15:03:21 UTCView event →
M 4.624 km SW of Port-Olry, Vanuatu35.0 km2023-01-08 15:06:29 UTCView event →
M 4.642 km W of Port-Olry, Vanuatu35.0 km2023-01-08 15:33:36 UTCView event →
M 4.921 km WSW of Port-Olry, Vanuatu35.0 km2023-01-08 16:49:21 UTCView event →
M 5.037 km W of Port-Olry, Vanuatu35.0 km2023-01-08 17:15:08 UTCView event →
M 4.7Vanuatu39.7 km2023-01-08 18:16:19 UTCView event →
M 4.614 km WSW of Port-Olry, Vanuatu34.4 km2023-01-08 21:12:18 UTCView event →
M 4.838 km WNW of Port-Olry, Vanuatu37.9 km2023-01-09 00:37:38 UTCView event →
M 5.222 km NW of Port-Olry, Vanuatu30.5 km2023-01-09 01:46:13 UTCView event →
M 5.031 km WNW of Port-Olry, Vanuatu13.3 km2023-01-09 01:48:00 UTCView event →
M 4.728 km SW of Port-Olry, Vanuatu35.0 km2023-01-09 19:36:18 UTCView event →
M 5.0Vanuatu29.4 km2023-01-09 21:21:54 UTCView event →
M 5.717 km ENE of Port-Olry, Vanuatu109.3 km2023-01-10 05:24:48 UTCView event →
M 4.743 km NW of Port-Olry, Vanuatu10.0 km2023-01-11 01:15:30 UTCView event →
M 5.837 km NW of Port-Olry, Vanuatu15.0 km2023-01-11 08:39:52 UTCView event →
M 4.521 km NW of Port-Olry, Vanuatu38.0 km2023-01-11 09:25:54 UTCView event →
M 4.537 km NNW of Port-Olry, Vanuatu15.2 km2023-01-11 09:43:19 UTCView event →
M 4.5Vanuatu10.0 km2023-01-12 00:13:35 UTCView event →
M 4.534 km W of Port-Olry, Vanuatu35.0 km2023-01-12 15:09:16 UTCView event →
M 4.649 km NNE of Port-Olry, Vanuatu155.4 km2023-01-13 00:42:55 UTCView event →
M 4.558 km WNW of Port-Olry, Vanuatu35.0 km2023-01-13 15:35:20 UTCView event →
M 4.553 km ENE of Port-Olry, Vanuatu124.3 km2023-01-13 18:56:03 UTCView event →
M 4.739 km WNW of Port-Olry, Vanuatu17.3 km2023-01-13 21:31:05 UTCView event →
M 5.139 km WNW of Port-Olry, Vanuatu20.7 km2023-01-14 14:31:27 UTCView event →
M 4.6142 km ENE of Sola, Vanuatu10.0 km2023-01-15 02:11:03 UTCView event →
M 4.827 km SE of Port-Vila, Vanuatu153.5 km2023-01-15 04:32:55 UTCView event →
M 5.2Vanuatu19.5 km2023-01-15 05:32:26 UTCView event →
M 5.621 km WNW of Port-Olry, Vanuatu21.0 km2023-01-15 12:04:16 UTCView event →
M 4.844 km NNW of Port-Olry, Vanuatu10.0 km2023-01-16 07:12:27 UTCView event →
M 4.9128 km NW of Sola, Vanuatu35.0 km2023-01-18 03:58:23 UTCView event →
M 4.5193 km SSE of Lata, Solomon Islands200.0 km2023-01-19 03:50:20 UTCView event →
M 4.6Vanuatu35.0 km2023-01-19 08:09:15 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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