Probably depends on which faults are connected to which, or something. We felt it here, gentle rolling ... weird. Lasted longer than the recent sharper ones near here (which is good -- if the recent ones nearer lasted that long I am sure there'd have been serious damage).
Yes, damage is usually a function of both intensity and duration of ground shaking. The same intensity can cause much greater damage if it lasts significantly longer.
As you noted, time slows down during these events. Ground shaking from this one lasted maybe 10 - 12 seconds. Loma Prieta lasted about 20 seconds. The 1907 quake resulted in strong ground motion for over 2 minutes! I can't quite imagine what that would be like - it must have seemed like it went on forever.
You are on solid bedrock, which does not amplify the shock waves as soil does. Also the waves passed across multiple faults and other geologic boundaries before reaching you - which tends to dissipate the energy. If the quake had been located at the same distance from you, but on the San Andreas Fault instead of the Calaveras, you likely would have felt it much more strongly.
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timeasmymeasure
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Date: 2007-10-31 03:40 pm (UTC)no subject
Date: 2007-10-31 06:00 pm (UTC)As you noted, time slows down during these events. Ground shaking from this one lasted maybe 10 - 12 seconds. Loma Prieta lasted about 20 seconds. The 1907 quake resulted in strong ground motion for over 2 minutes! I can't quite imagine what that would be like - it must have seemed like it went on forever.
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Date: 2007-10-31 05:31 pm (UTC)no subject
Date: 2007-11-01 01:12 am (UTC)no subject
Date: 2007-11-01 01:47 am (UTC)no subject
Date: 2007-11-01 02:38 am (UTC)no subject
Date: 2007-11-01 02:42 am (UTC)