Just go into your wallet, Help -> Debug Window -> Console, then type “getmotions” and hit enter. Then you will see one entry like this:
“6f361693a7b248730b41d4292f89dc6f6f166bc8” : {
“blocks” : 5183,
“block_percentage” : 51.83,
“sharedays” : 1720940944,
“shareday_percentage” : 50.92664766
},
You can also provide a specific block height and quantity to this command.
EDIT: And why exactly is the blockexplorer down? Please don’t say DDOS …