California earthquakes

M7.1 earthquake Ridgecrest Earthquake Sequence

A magnitude 7.1 earthquake struck in Ridgecrest Earthquake Sequence on Fri, Jul 5, 2019, 8:19 PM PDT (03:19 UTC), 8 km (5 mi) below the surface.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 7.1 (mw), major
Local time: Fri, Jul 5, 2019, 8:19 PM PDT
UTC: 2019-07-06 03:19:53 UTC
Depth: 8.0 km (5.0 mi), shallow
Epicenter: 35.770° N, 117.599° W
Region: California
Felt reports: 39,888
Strongest shaking: IX, violent shaking
PAGER alert: Yellow
Tsunami flag: No
Status: Reviewed by a seismologist

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated: IX, violent shaking
Peak ground acceleration: 73.5% of gravity
Peak ground velocity: 4.6 cm/s
Map: Automatic

USGS ShakeMap: estimated shaking intensity around the epicenter — Estimated shaking intensity. Map: USGS ShakeMap.

Did you feel it?

39,888 people reported to the USGS what they felt; the strongest reported shaking was IX, violent shaking.

Estimated impact

The USGS PAGER system estimates deaths and economic losses from the shaking and the population and buildings exposed to it.

Alert level: Yellow: some damage and deaths possible, a local or regional response

Deaths: estimated chance of each range
Range	Chance
Under 1	65%
1 to 10	30%
10 to 100	4%
100 to 1,000	Under 1%
1,000 to 10,000	Under 1%
10,000 to 100,000	Under 1%
100,000 to 10,000,000	Under 1%

Economic losses: estimated chance of each range
Range, million USD	Chance
Under 1	8%
1 to 10	23%
10 to 100	35%
100 to 1,000	25%
1,000 to 10,000	8%
10,000 to 100,000	1%
100,000 to 10,000,000	Under 1%

Aftershock forecast

The chance of at least one aftershock this large or larger, from the USGS operational aftershock forecast, issued Thu, Sep 3, 2026, 3:19 AM UTC. The USGS updates it as the sequence unfolds.

Within	M3+	M4+	M5+	M6+	M7+
1 day	2%	Under 1%	Under 1%	Under 1%	Under 1%
1 week	12%	1%	Under 1%	Under 1%	Under 1%
1 month	43%	5%	Under 1%	Under 1%	Under 1%
1 year	Over 99%	47%	6%	Under 1%	Under 1%

In the coming week the USGS expects about 0 aftershocks of magnitude 3 or more, and most likely between 0 and 1.

Fault motion and ground failure

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Landslide alert: Yellow
Liquefaction alert: Yellow

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 0.2 km horizontally, 31.6 km in depth
Magnitude uncertainty: ±0.03
Depth from: Operator assigned
Station coverage gap: 43°
Stations used: 77

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 2.5 and up: 200 in the 60 days after this one and 0 in the 30 days before it.

After

The first 60 of 200.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci38457511 (also filed as us70004bn0, at00pu7alg, pt19187000, iscgem616203758). Read Tue, Sep 22, 2026, 9:19 PM UTC.