Sequence · 2019-01-15

M 6.6 · Observed seismic cluster · 94 km NW of Sola, 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 cluster13
M6+1
Analysis radius276 km
Observation window14 days
Largest secondary eventM 5.1
Quake Pulse · Strong sequence

What the sequence shows

After the M 6.6 reference event, Quake Pulse counts 1 M4+ event(s) in the first 24 hours and 4 in the first 7 days. Fourteen-day M4.5+ activity is about 3.2× the average equivalent derived from the previous year. The largest secondary event is M 1.5 below the reference event.

71/100Sequence score
Events in the previous 24 h0
In the first hour0
In the first 24 hours1
In the first 7 days4
Within 14 days12
Peak one-hour count1

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 d99Average 14-day equivalent3.8Activity / baseline ratio3.2×

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 5.1Magnitude gapM 1.5Observed duration13.8 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.

94 km NW of Sola, Vanuatu · 276 kmInteractive 3D view of earthquakes within 276 km of 94 km NW of Sola, Vanuatu.94 km NW of Sola, VanuatuM 4.5 · 114 km NW of Sola, Vanuatu · 22.5 km
94 km NW of Sola, Vanuatu276 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

1 Felt reports · PAGER GREEN · Tsunami indicator · Shallow

55/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 6.694 km NW of Sola, Vanuatu35.0 km2019-01-15 18:06:34 UTCView event →
M 4.5114 km NW of Sola, Vanuatu49.8 km2019-01-16 07:21:28 UTCView event →
M 5.159 km SSW of Sola, Vanuatu182.4 km2019-01-17 02:54:48 UTCView event →
M 4.679 km SSW of Lata, Solomon Islands10.0 km2019-01-18 09:26:52 UTCView event →
M 4.678 km SE of Sola, Vanuatu10.0 km2019-01-18 17:03:12 UTCView event →
M 4.5157 km WNW of Port-Olry, Vanuatu10.0 km2019-01-24 02:17:01 UTCView event →
M 4.7134 km WNW of Sola, Vanuatu35.0 km2019-01-25 13:29:40 UTCView event →
M 4.7159 km WNW of Sola, Vanuatu17.5 km2019-01-26 13:52:10 UTCView event →
M 4.9111 km WNW of Sola, Vanuatu35.0 km2019-01-28 03:10:17 UTCView event →
M 4.532 km WNW of Sola, Vanuatu214.4 km2019-01-28 08:47:29 UTCView event →
M 4.6158 km NW of Sola, Vanuatu83.6 km2019-01-29 01:52:34 UTCView event →
M 4.841 km NE of Port-Olry, Vanuatu125.9 km2019-01-29 09:36:58 UTCView event →
M 4.542 km S of Sola, Vanuatu10.0 km2019-01-29 13:31:29 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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