404. That’s an error.

The requested URL /bookmarks/mark?op=add&title=M0.3++-+4km+WSW+of+Mammoth+Lakes%2C+California+%28BETA%29+2014-02-07+02%3A48%3A04+UTC&annotation=&nui=1&service=bookmarks&bkmk=http%3A%2F%2Fcomcat.cr.usgs.gov%2Fearthquakes%2Feventpage%2Fnc72157986 was not found on this server. That’s all we know.