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Minor mag. 1.7 earthquake - 3km NW of Diablo, CA, on Wednesday, Nov 30, 2022 at 1:04 am (GMT -8) -

Minor magnitude 1.7 earthquake at 8 km depth

30 Nov 09:07 UTC: First to report: USGS after 3 minutes.
30 Nov 19:58: Magnitude recalculated from 1.6 to 1.7. Hypocenter depth recalculated from 7.5 to 8.1 km (from 4.7 to 5 mi).

Earthquake details

Date & time	Nov 30, 2022 09:04:15 UTC -
Local time at epicenter	Wednesday, Nov 30, 2022 at 1:04 am (GMT -8)
Status	Confirmed
Magnitude	1.7
Depth	8.1 km
Epicenter latitude / longitude	37.85133°N / 121.98533°W (California, United States)
Antipode	37.851°S / 58.015°E
Shaking intensity	Very weak shaking
Felt	1 report
Primary data source	USGS (United States Geological Survey)
Nearest volcano	Clear Lake (142 km / 88 mi)
Nearby towns and cities	3 km (2 mi) NW of Diablo (pop: 1,160) \| Show on map \| Quakes nearby 4 km (2 mi) NNE of Danville (pop: 44,400) \| Show on map \| Quakes nearby 8 km (5 mi) N of San Ramon (pop: 76,100) \| Show on map \| Quakes nearby 9 km (6 mi) SE of Walnut Creek (pop: 68,900) \| Show on map \| Quakes nearby 13 km (8 mi) SSE of Pleasant Hill (pop: 34,800) \| Show on map \| Quakes nearby 15 km (9 mi) SSE of Concord (pop: 128,700) \| Show on map \| Quakes nearby 26 km (16 mi) ENE of Oakland (pop: 419,300) \| Show on map \| Quakes nearby 39 km (24 mi) ENE of San Francisco (pop: 864,800) \| Show on map \| Quakes nearby
Weather at epicenter at time of quake	Clear Sky 5.3°C (42 F), humidity: 71%, wind: 3 m/s (5 kts) from S
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	8.1 km	3km NW of Diablo, CA	USGS
1.7	8.1 km	Central California	RaspberryShake
1.6	10 km	Central 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: 85 km / 53 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: 130 km / 81 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: Columbia College, Columbia, CA, USA (CMB/BK network) | Distance from quake: 142 km / 88 mi | Show on map | Station Info

Seismic station Columbia College, Columbia, CA, USA: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station Columbia College, Columbia, CA, USA: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Columbia College, Columbia, 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: 278 km / 173 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: Simmler (SMM/CI network) | Distance from quake: 333 km / 207 mi | Show on map | Station Info

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

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

Seismic station Simmler: 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 (1)

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

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.

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Panorama City / Very weak shaking (MMI II) / horizontal (sideways) swinging / 2-5 s

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