Earthquake · automatic estimate, may change
M 1.8ml
9km NE of Coso Junction, CA
Yes. A magnitude 1.8 earthquake was recorded 9km NE of Coso Junction, CA, at 12:36 am PDT on 18 July 2019 (07:36 UTC), 4.7 km deep. 1 person has reported feeling it to USGS. The magnitude and location are an automatic first estimate and may change.
- When
- Magnitude
- M 1.8 (ml)
- Depth
- 4.7 km below the surface
- Felt
- 1 report · strongest reported intensity III
- Nearest
- Inyo County, 66 km NE
- Nearest mapped fault
- Southern Sierra Nevada fault, 10 km from its surface trace — near is not the same as on
- Status
- Automatic — a machine’s first estimate, which may change
USGS · last changed by USGS · we first saw it 2674 days ago
Earthquake alerts for Inyokern, CA
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Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 12 km (7 mi) from the epicentre. Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
How big was it?
This earthquake released about 13 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,100,000× the energy of this one
- Magna, Utah 2020 M 5.7 810,000× the energy of this one
- Around the size people start to feel M 3.0 72× the energy of this one
- This earthquake M 1.8 about 13 lb of TNT
Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.
For this area
The largest earthquake within 50 km since 2016 was M 7.1 on 2019-07-06 — about 100,000,000 times the energy of this one.
Before 2016, the USGS record lists 18 earthquakes of M5 or more within 50 km; the five largest:
- 6.3 The 1946 Walker Pass, California Earthquake · 45 km S of this epicentre
- 5.8 16km NNE of Ridgecrest, California · 44 km SSE of this epicentre
- 5.4 14km NW of Inyokern, CA · 43 km S of this epicentre
- 5.4 4km N of Inyokern, CA · 48 km S of this epicentre
- 5.4 17km N of Ridgecrest, California · 42 km SSE of this epicentre
Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.
Where
Epicentre 36.1067, -117.8812. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Inyo County, CA | 66 km (41 mi) | NE | earthquakes near Inyo County |
| Tulare County, CA | 82 km (51 mi) | W | earthquakes near Tulare County |
| Kern County, CA | 114 km (71 mi) | SW | earthquakes near Kern County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
51 earthquakes have been recorded within 50 km since this one.
- 1.6 16km W of Searles Valley, CA
- 2.6 20km E of Little Lake, CA
- 2.0 19km N of Ridgecrest, CA
- 1.9 13km NE of Coso Junction, CA
- 1.6 22km ESE of Little Lake, CA
- 2.0 24km N of Searles Valley, CA
- 2.3 18km ESE of Little Lake, CA
- 2.3 12km ENE of Coso Junction, CA
- 2.4 23km WNW of Searles Valley, CA
- 1.5 14km SE of Olancha, CA
- 1.5 12km ENE of Coso Junction, CA
- 2.0 16km W of Searles Valley, CA
- 1.8 17km E of Little Lake, CA
- 2.5 18km W of Searles Valley, CA
- 1.6 13km NE of Coso Junction, CA
Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.
On USGS
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.