I was in my home office on the second floor and the house was shaken (not stirred) quite a bit for the quake (5.8). Irene was a bit less shake but she knocked on the door a whole lot longer and harder. No boats were injured in either altercation.
For US earthquakes the largest to ever hit the continental US was NOT in California
but the New Madrid on the Mississippi
River in 1811 (may have been an 8.1). It made the river flow backwards for a time and was felt in an area 10 times larger than the San Francisco
earthquake of 1906 that holds the record
for most fatalities by more than 25 times of any other US quake. The 1964 quake in Alaska
was the biggest overall 9.2 on the scale with 143 deaths.
Relatives of neighbors had all their windows blown out in Mineral, Virginia where the quake epicenter hit.