Sequence · 2026-03-02

M 6.0 · Observed seismic cluster · Volcano Islands, Japan region

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 cluster6
M6+1
Analysis radius180 km
Observation window14 days
Largest secondary eventM 4.9
Quake Pulse · Notable sequence

What the sequence shows

After the M 6.0 reference event, Quake Pulse counts 3 M4+ event(s) in the first 24 hours and 6 in the first 7 days. Fourteen-day M4.5+ activity is about 10.4× the average equivalent derived from the previous year. The largest secondary event is M 1.1 below the reference event.

55/100Sequence score
Events in the previous 24 h0
In the first hour1
In the first 24 hours3
In the first 7 days6
Within 14 days6
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 d15Average 14-day equivalent0.6Activity / baseline ratio10.4×

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 4.9Magnitude gapM 1.1Observed duration6.6 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.

Volcano Islands, Japan region · 180 kmInteractive 3D view of earthquakes within 180 km of Volcano Islands, Japan region.Volcano Islands, Japan regionM 4.9 · Volcano Islands, Japan region · 4.5 kmM 4.6 · Volcano Islands, Japan region · 2.5 kmM 4.6 · Volcano Islands, Japan region · 28.7 km
Volcano Islands, Japan region180 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

1 Felt reports · PAGER GREEN · Shallow

31/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 6.0Volcano Islands, Japan region20.0 km2026-03-02 03:55:23 UTCView event →
M 4.9Volcano Islands, Japan region10.0 km2026-03-02 04:07:46 UTCView event →
M 4.6Volcano Islands, Japan region10.0 km2026-03-02 07:25:14 UTCView event →
M 4.6Volcano Islands, Japan region10.0 km2026-03-02 18:05:58 UTCView event →
M 4.9Volcano Islands, Japan region10.0 km2026-03-03 14:55:56 UTCView event →
M 4.8Volcano Islands, Japan region35.0 km2026-03-05 15:49:14 UTCView event →
M 4.7Mariana Islands region303.3 km2026-03-08 19:08:04 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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