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Sequence · 2003-06-20

M 6.8 · Observed seismic cluster · 42 km W of Ovalle, Chile

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 5.2
Quake Pulse

Sequence timeline

Within first 24 hours4
Within first 7 days10
Observed duration12.9 d
Gap from reference eventM 1.6
0 h12.9 d
Quake Pulse

Main-event impact

Shallow

51/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 6.842 km W of Ovalle, Chile33.0 km2003-06-20 13:30:41 UTCView event →
M 4.656 km WSW of Ovalle, Chile16.1 km2003-06-20 14:07:31 UTCView event →
M 4.760 km WSW of Ovalle, Chile14.7 km2003-06-20 15:16:42 UTCView event →
M 5.239 km WSW of Ovalle, Chile38.3 km2003-06-20 16:20:28 UTCView event →
M 4.551 km WSW of Ovalle, Chile15.5 km2003-06-23 17:27:23 UTCView event →
M 4.840 km N of La Serena, Chile29.5 km2003-06-24 19:31:00 UTCView event →
M 4.557 km WSW of Ovalle, Chile20.2 km2003-06-24 23:46:53 UTCView event →
M 4.644 km WSW of Ovalle, Chile29.7 km2003-06-26 09:29:31 UTCView event →
M 4.571 km W of Ovalle, Chile48.3 km2003-06-26 17:37:48 UTCView event →
M 4.567 km W of Ovalle, Chile16.3 km2003-06-27 09:37:14 UTCView event →
M 4.517 km SSW of Ovalle, Chile60.4 km2003-07-03 11:59:06 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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