I remember growing up in the OC back in the day and the OC Register had a section dedicated to the chance of the Newport-Inglewood fault earthquake and they claimed that a 6.5 on the NI fault would be as devastating as an 8 on the San Andreas fault.
How true that is I don’t know but a big coastal quake can cause liquifaction.
I remember the Whittier Narrows quake in 1987. We were living in Lakewood at the time & it felt like the big one even though it was only 5.5. Then I went through the 2 quakes in Landers in 1992. I had just finished telling my kids that there wasn’t going to be another one for a long time. Then the second one hit a few hours later.