Sequence · 2009-10-01

M 6.6 · Observed seismic cluster · 49 km SSE of Sungai Penuh, Indonesia

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 cluster8
M6+1
Analysis radius276 km
Observation window14 days
Largest secondary eventM 5.3
Quake Pulse

Sequence timeline

Within first 24 hours3
Within first 7 days8
Observed duration6.1 d
Gap from reference eventM 1.3
0 h6.1 d
Quake Pulse

Main-event impact

160 Felt reports · Shallow

56/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 6.649 km SSE of Sungai Penuh, Indonesia9.0 km2009-10-01 01:52:27 UTCView event →
M 5.339 km S of Sungai Penuh, Indonesia10.0 km2009-10-01 02:20:30 UTCView event →
M 4.844 km SE of Sungai Penuh, Indonesia10.0 km2009-10-01 03:40:22 UTCView event →
M 4.560 km SSE of Sungai Penuh, Indonesia10.0 km2009-10-02 10:24:16 UTCView event →
M 4.559 km SE of Sungai Penuh, Indonesia10.0 km2009-10-02 14:54:06 UTCView event →
M 4.511 km E of Padang, Indonesia74.3 km2009-10-02 15:08:46 UTCView event →
M 4.834 km SW of Pariaman, Indonesia93.7 km2009-10-05 12:51:03 UTCView event →
M 4.614 km S of Pariaman, Indonesia90.2 km2009-10-07 03:19:01 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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