Sequence · 2026-06-19

M 6.6 · Observed seismic cluster · 141 km ESE of Petropavlovsk-Kamchatsky, Russia

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 cluster11
M6+1
Analysis radius276 km
Observation window14 days
Largest secondary eventM 5.8
Quake Pulse · Strong sequence

What the sequence shows

After the M 6.6 reference event, Quake Pulse counts 8 M4+ event(s) in the first 24 hours and 9 in the first 7 days. Fourteen-day M4.5+ activity is about 0.2× the average equivalent derived from the previous year. The largest secondary event is M 0.8 below the reference event.

60/100Sequence score
Events in the previous 24 h1
In the first hour4
In the first 24 hours8
In the first 7 days9
Within 14 days10
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 d1,593Average 14-day equivalent61.1Activity / baseline ratio0.2×

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 5.8Magnitude gapM 0.8Observed duration10.0 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.

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

45/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 6.6141 km ESE of Petropavlovsk-Kamchatsky, Russia14.0 km2026-06-19 06:52:32 UTCView event →
M 5.0159 km ESE of Petropavlovsk-Kamchatsky, Russia10.0 km2026-06-19 06:56:03 UTCView event →
M 4.9171 km E of Petropavlovsk-Kamchatsky, Russia10.0 km2026-06-19 07:05:44 UTCView event →
M 4.5155 km E of Petropavlovsk-Kamchatsky, Russia10.0 km2026-06-19 07:09:55 UTCView event →
M 4.5166 km ESE of Petropavlovsk-Kamchatsky, Russia10.0 km2026-06-19 07:48:55 UTCView event →
M 5.8164 km E of Petropavlovsk-Kamchatsky, Russia10.0 km2026-06-19 07:52:57 UTCView event →
M 5.2166 km ESE of Petropavlovsk-Kamchatsky, Russia10.0 km2026-06-19 08:03:40 UTCView event →
M 5.8156 km ESE of Petropavlovsk-Kamchatsky, Russia10.0 km2026-06-20 03:49:03 UTCView event →
M 4.6174 km E of Petropavlovsk-Kamchatsky, Russia10.0 km2026-06-20 04:38:45 UTCView event →
M 4.5161 km ESE of Petropavlovsk-Kamchatsky, Russia10.0 km2026-06-21 12:12:57 UTCView event →
M 4.5195 km SSE of Vilyuchinsk, Russia10.0 km2026-06-29 07:36:11 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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