Block height - The block amount and size on the blockchain (in blocks) on generation of the present block Nonce - The transaction selection for the from address (bear in mind this starts at 0 so a nonce of 100 would really be the 101st transaction submitted by this account) https://webcastlist.com/story21686904/detailed-notes-on-blockchain-explorer-unconfirmed-transaction-https-coveruncle7-werite-net-blockchain-explorers-the-key-to-comprehending-copyright-transactions