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Sequence · 2009-11-24

M 6.8 · Observed seismic cluster · 104 km SSE of Pangai, Tonga

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 radius308 km
Observation window14 days
Largest secondary eventM 5.6
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Sequence timeline

Within first 24 hours4
Within first 7 days9
Observed duration9.1 d
Gap from reference eventM 1.2
0 h9.1 d
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Main-event impact

8 Felt reports · Shallow

53/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 6.8104 km SSE of Pangai, Tonga18.0 km2009-11-24 12:47:15 UTCView event →
M 5.6103 km SSE of Pangai, Tonga10.0 km2009-11-24 13:04:22 UTCView event →
M 5.191 km SSE of Pangai, Tonga10.0 km2009-11-24 13:32:10 UTCView event →
M 4.8120 km ENE of ‘Ohonua, Tonga10.0 km2009-11-24 17:21:08 UTCView event →
M 4.790 km SSE of Neiafu, Tonga102.5 km2009-11-26 04:46:22 UTCView event →
M 4.7119 km ENE of Pangai, Tonga10.0 km2009-11-26 16:52:30 UTCView event →
M 5.2124 km ENE of ‘Ohonua, Tonga10.0 km2009-11-27 23:48:18 UTCView event →
M 4.8147 km WNW of Pangai, Tonga200.5 km2009-11-30 00:13:28 UTCView event →
M 5.1159 km WSW of Haveluloto, Tonga180.3 km2009-11-30 01:13:18 UTCView event →
M 5.097 km SE of Pangai, Tonga10.0 km2009-12-02 08:19:59 UTCView event →
M 5.086 km WNW of Neiafu, Tonga86.1 km2009-12-03 16:03:11 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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