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Event status: uncertain, preliminary [?]

Unconfirmed earthquake or seismic-like event: 7.1 mi south of Chula Vista, San Diego County, California, USA, Tuesday, Jan 24, 2023 at 12:09 pm (GMT -8) -

Unconfirmed earthquake or seismic-like event: 7.1 mi south of Chula Vista, San Diego County, California, USA, Tuesday, Jan 24, 2023 at 12:09 pm (GMT -8) Unconfirmed earthquake or seismic-like event: 7.1 mi south of Chula Vista, San Diego County, California, USA, Tuesday, Jan 24, 2023 at 12:09 pm (GMT -8)
24 Jan 20:13 UTC: First to report: VolcanoDiscovery after 3 minutes.

Earthquake details

Date & timeJan 24, 2023 20:09:36 UTC -
Local time at epicenterTuesday, Jan 24, 2023 at 12:09 pm (GMT -8)
Statusuncertain, preliminary
Magnitudeunknown (3.8?)
Depth20.0 km
Epicenter latitude / longitude32.53912°N / 117.11002°W (San Diego, California, United States)
Antipode32.539°S / 62.89°E
Shaking intensityWeak shaking
Felt7 reports
Primary data sourceVolcanoDiscovery (User-reported shaking)
Nearest volcanoSalton Buttes (158 km / 98 mi)
Nearby towns and cities5 km (3 mi) S of Imperial Beach (San Diego County) (pop: 27,400) | Show on map | Quakes nearby
11 km (7 mi) SSW of Chula Vista (pop: 265,800) | Show on map | Quakes nearby
15 km (10 mi) S of National City (pop: 61,100) | Show on map | Quakes nearby
20 km (13 mi) SSE of San Diego (pop: 1,394,900) | Show on map | Quakes nearby
22 km (13 mi) SSW of La Presa (San Diego County) (pop: 34,200) | Show on map | Quakes nearby
27 km (17 mi) SSW of La Mesa (pop: 60,100) | Show on map | Quakes nearby
32 km (20 mi) SSW of El Cajon (pop: 103,700) | Show on map | Quakes nearby
780 km (485 mi) SSE of Sacramento (pop: 490,700) | Show on map | Quakes nearby
Weather at epicenter at time of quakeClear Sky 17.8°C (64 F), humidity: 35%, wind: 3 m/s (6 kts) from WNW
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Seismograms

Seismic station: Barrett (BAR/CI network) | Distance from quake: 44 km / 27 mi | Show on map | Station Info
Seismic station Barrett: 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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User reports for this quake (7)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Chula Vista, San Diego, California (10 km NNW of epicenter) [Map] / Moderate shaking (MMI V) / single vertical bump / 1-2 s : Felt like a sonic boom but through the ground as we stood on our sidewalk. | 2 users found this interesting.  
playas de tijuana (1 km SW of epicenter) [Map] / Light shaking (MMI IV) / 1-2 s : It was like a fast wave, the windows make a loud noise and that's it. | 2 users found this interesting.  
Playas de Tijuana (15.7 km SSE of epicenter) [Map] / Weak shaking (MMI III) : Fuerte y rápido | One user found this interesting.  
La Esperanza [Granjas Familiares], Tijuana, Baja California (2.4 km SSW of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 5-10 s : The windows and sliding glass door started rattling and shaking loudly, though there was no wind | One user found this interesting.  
Imperial Beach, San Diego, California (3.5 km NNW of epicenter) [Map] / Weak shaking (MMI III) / single lateral shake / very short : It was a single shake | One user found this interesting.  
Playas de Tijuana (1.5 km WSW of epicenter) [Map] / Weak shaking (MMI III) / single vertical bump / 1-2 s : Doors and windows move  
Tijuana (2.1 km S of epicenter) [Map] / Weak shaking (MMI III) / single lateral shake / 1-2 s

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