Terremoto forte mag. 5.1 - 20 km a est da San Jose, Contea di Santa Clara County, Contea di Kern, Stati Uniti, martedì, 25 ott 2022 11:42 (GMT -7) -

An earthquake of magnitude 5.1 occurred in the morning on Tuesday, October 25th, 2022, at 11:42 am local time near San Jose, Santa Clara County, California, USA, as reported by the United States Geological Survey.
According to preliminary data, the quake was located at a very shallow depth of 4.3 miles. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
A second report was later issued by the citizen-seismograph network of RaspberryShake, which listed it as a magnitude 5.1 earthquake as well. A third agency, the European-Mediterranean Seismological Centre (EMSC), reported the same quake at magnitude 5.1.
Based on the preliminary seismic data, the quake was probably felt by many people in the area of the epicenter. It should not have caused significant damage, other than objects falling from shelves, broken windows, etc.
In East Foothills (pop. 8,300) located 9 miles from the epicenter, San Jose (pop. 1,026,900) 12 miles away, Morgan Hill (pop. 42,900) 13 miles away, Milpitas (pop. 77,600) 15 miles away, Santa Clara (pop. 126,200) 16 miles away, seonibeil (pop. 151,800) 20 miles away, Mountain View (pop. 80,400) 23 miles away, and Fremont (pop. 232,200) 24 miles away, the quake should have been felt as light shaking.
Weak shaking might have been felt in San Francisco (pop. 864,800) located 52 miles from the epicenter.
VolcanoDiscovery will automatically update magnitude and depth if these change and follow up if other significant news about the quake become available. If you're in the area, please send us your experience through our reporting mechanism, either online or via our mobile app. This will help us provide more first-hand updates to anyone around the globe who wants to know more about this quake.

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Based on its magnitude, the fault that was active during the quake ruptured along a surface of approx. 13 km² (=5 sqare miles) as a first-order estimate. The length of the rupture zone thus was probably around 6 km (4 mi).
Aftershocks typically occur during the days and weeks following the quake at or near the same fault, at distances of up to approx. two times the length of the rupture zone.
The often broadly linear arrangement of aftershock epicenters encompasses the rupture zone of the main shock (check on the map below to verify).

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