404. That’s an error.

The requested URL /bookmarks/mark?op=add&title=M1.7++-+23km+SE+of+Yosemite+Valley%2C+California+%28BETA%29+2014-03-12+18%3A29%3A28+UTC&annotation=&nui=1&service=bookmarks&bkmk=http%3A%2F%2Fcomcat.cr.usgs.gov%2Fearthquakes%2Feventpage%2Fnc72183566 was not found on this server. That’s all we know.