Sequence · 2019-07-06

M 7.1 · Observed seismic cluster · Ridgecrest Earthquake Sequence

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 cluster27
M6+1
Analysis radius356 km
Observation window14 days
Largest secondary eventM 5.5
Quake Pulse · Major sequence

What the sequence shows

After the M 7.1 reference event, Quake Pulse counts 22 M4+ event(s) in the first 24 hours and 25 in the first 7 days. Fourteen-day M4.5+ activity is about 52.0× the average equivalent derived from the previous year. The largest secondary event is M 1.6 below the reference event.

85/100Sequence score
Events in the previous 24 h2
In the first hour16
In the first 24 hours22
In the first 7 days25
Within 14 days26
Peak one-hour count16

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 d4Average 14-day equivalent0.2Activity / baseline ratio52.0×

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 5.5Magnitude gapM 1.6Observed duration12.0 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

39,888 Felt reports · PAGER YELLOW · Shallow

88/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 7.1Ridgecrest Earthquake Sequence8.0 km2019-07-06 03:19:53 UTCView event →
M 4.815km E of Little Lake, CA9.3 km2019-07-06 03:20:41 UTCView event →
M 4.616km E of Little Lake, CA8.2 km2019-07-06 03:22:03 UTCView event →
M 4.613km W of Searles Valley, CA3.9 km2019-07-06 03:22:17 UTCView event →
M 4.717km S of Searles Valley, CA9.4 km2019-07-06 03:22:35 UTCView event →
M 4.616km ESE of Little Lake, CA9.1 km2019-07-06 03:22:48 UTCView event →
M 4.522km ESE of Little Lake, CA6.8 km2019-07-06 03:23:19 UTCView event →
M 4.820km WNW of Searles Valley, CA11.4 km2019-07-06 03:23:50 UTCView event →
M 4.623km ESE of Little Lake, CA10.3 km2019-07-06 03:25:27 UTCView event →
M 4.516km E of Little Lake, CA8.0 km2019-07-06 03:27:07 UTCView event →
M 4.624km ESE of Ridgecrest, CA3.8 km2019-07-06 03:27:11 UTCView event →
M 4.518km ESE of Little Lake, CA3.2 km2019-07-06 03:29:32 UTCView event →
M 5.515km ESE of Little Lake, CA5.0 km2019-07-06 03:47:53 UTCView event →
M 5.019km E of Little Lake, CA8.3 km2019-07-06 03:50:59 UTCView event →
M 4.716km ESE of Ridgecrest, CA5.5 km2019-07-06 04:07:04 UTCView event →
M 4.87km SE of Ridgecrest, CA9.7 km2019-07-06 04:13:07 UTCView event →
M 5.420km E of Little Lake, CA7.4 km2019-07-06 04:18:55 UTCView event →
M 4.916km ESE of Little Lake, CA1.9 km2019-07-06 04:36:55 UTCView event →
M 4.615km E of Little Lake, CA5.0 km2019-07-06 06:01:51 UTCView event →
M 4.616km SSW of Searles Valley, CA3.1 km2019-07-06 08:32:57 UTCView event →
M 4.917km ESE of Little Lake, CA4.0 km2019-07-06 09:28:28 UTCView event →
M 4.518km E of Little Lake, CA2.4 km2019-07-06 13:06:55 UTCView event →
M 4.523km N of Ridgecrest, CA6.5 km2019-07-06 23:50:41 UTCView event →
M 4.516km W of Searles Valley, CA10.5 km2019-07-07 05:38:15 UTCView event →
M 4.516km NNE of Coso Junction, CA0.9 km2019-07-11 00:14:37 UTCView event →
M 4.98km ENE of Ridgecrest, CA9.5 km2019-07-12 13:11:37 UTCView event →
M 4.69km NE of Coso Junction, CA1.6 km2019-07-18 03:59:14 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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