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Minor mag. 1.7 earthquake - 3km W of Cobb, CA, on Saturday, Mar 18, 2023 at 4:08 am (GMT -7) -

Minor magnitude 1.7 earthquake at 2 km depth

18 Mar 11:10 UTC: First to report: USGS after 2 minutes.

Earthquake details

Date & time	Mar 18, 2023 11:08:11 UTC -
Local time at epicenter	Saturday, Mar 18, 2023 at 4:08 am (GMT -7)
Status	Confirmed
Magnitude	1.7
Depth	1.7 km
Epicenter latitude / longitude	38.81867°N / 122.76266°W (California, United States)
Antipode	38.819°S / 57.237°E
Shaking intensity	Very weak shaking
Felt	0 reports
Primary data source	USGS (United States Geological Survey)
Nearest volcano	Clear Lake (17 km / 11 mi)
Nearby towns and cities	3 km (2 mi) W of Cobb (pop: 1,780) \| Show on map \| Quakes nearby 18 km (11 mi) W of Hidden Valley Lake (pop: 5,580) \| Show on map \| Quakes nearby 19 km (12 mi) SW of Clearlake (Lake County) (pop: 15,200) \| Show on map \| Quakes nearby 22 km (14 mi) E of Cloverdale (Sonoma County) (pop: 8,810) \| Show on map \| Quakes nearby 25 km (15 mi) NNE of Russian River (Sonoma County) (pop: 11,700) \| Show on map \| Quakes nearby 31 km (19 mi) N of Windsor (Sonoma County) (pop: 27,500) \| Show on map \| Quakes nearby 42 km (26 mi) N of Santa Rosa (pop: 175,000) \| Show on map \| Quakes nearby 89 km (55 mi) NW of Fairfield (pop: 113,000) \| Show on map \| Quakes nearby
Weather at epicenter at time of quake	Clear Sky 1.1°C (34 F), humidity: 86%, wind: 2 m/s (3 kts) from NE
Estimated seismic energy released	2.2 x 10⁷ joules (6.22 kilowatt hours) \| about seismic energy

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Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.

Mag.	Depth	Location	Source
1.7	1.7 km	3km W of Cobb, CA	USGS
1.7	1.7 km	Northern California	RaspberryShake
1.7	10 km	Northern California	IRIS

Most recent quakes Top 20 past 24 hrs Quakes in the US California

Seismograms

Seismic station: Marconi Conference Center, Marshall, CA, USA (MCCM/BK network) | Distance from quake: 76 km / 47 mi | Show on map | Station Info

Seismic station Marconi Conference Center, Marshall, CA, USA: vertical movement plot around time of quake (source: IRIS/BUD)

Seismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Bandpass filter applied: 0.5-10.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool

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Seismic station Marconi Conference Center, Marshall, CA, USA: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Marconi Conference Center, Marshall, CA, USA: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake, showing horizontal E-W and N-S ground movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: San Andreas Geophysical Obs., Hollister, CA, USA (SAO/BK network) | Distance from quake: 256 km / 159 mi | Show on map | Station Info

Seismic station San Andreas Geophysical Obs., Hollister, CA, USA: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station San Andreas Geophysical Obs., Hollister, CA, USA: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station San Andreas Geophysical Obs., Hollister, CA, USA: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Mammoth (MLAC/CI network) | Distance from quake: 368 km / 228 mi | Show on map | Station Info

Seismic station Mammoth: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station Mammoth: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Mammoth: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Valley Oaks Golf Course (VOG/CI network) | Distance from quake: 407 km / 253 mi | Show on map | Station Info

Seismic station Valley Oaks Golf Course: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station Valley Oaks Golf Course: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Valley Oaks Golf Course: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Tinemaha (TIN/CI network) | Distance from quake: 443 km / 275 mi | Show on map | Station Info

Seismic station Tinemaha: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station Tinemaha: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Tinemaha: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

User reports for this quake

At magnitude 1.7, such a quake wouldn't normally be felt by people, but could be recorded instrumentally.

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