8 SCOTUS vacancies at once - what happens?

[Sir Mohamed]

I know this purely hypothetical scenario is unrealistic, but what if for some reason - terror attack or deady virus - 8 SCOTUS justices die at once? Would the surviving justice rule all cases on his or her own? At least for some weeks until nominations are sent to the senate and approved?

[NewYorkExpress]

I would imagine the Supreme Court has a quorum requirement (at least I hope they do-the thought of Brett Kavanaugh making decisions by himself scares me.)

[Dereich]

The Judiciary Act of 1869 set a quorum at 6 justices, though that is only to hear a case. Even once new justices were appointed they wouldn't vote on cases where they had not participated in argument or deliberations. And any unpublished opinions from the deceased justices would be null; SCOTUS ruled last year in Yovino v. Rizo that if a justice dies before his written opinion or vote is published, that vote does not count. I assume they'd rehear every case that was under consideration at the time.