The explorer is running in 'regtest' mode. This saves disk space, but there is limited data.
The code for this application can be found at github.com/pdxrod/blockchain_explorer.

home    blocks

Enter a block height, e.g. 123, or the start of a bitcoin address, e.g. mkrgsKuFE

Height: 7
Hash: 3f46a2df37bce0b13d1eda674b56d1474922a080fb814b62192da0d26c40c46a
Previous block: 6c9fd2bd32d1d897929cb4c9cc3fb80bd4f56bb6cfe10fcf3640bfa2d42b1db8
Next block: 256c455c56470d774a40294c33b7b76c7a764d7bf7ae115b5144e42d0bc77453
Weight: 904
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1544074734
Stripped size: 226
Size: 226
Nonce: 2
Merkle root: cc93d34e01510674dfa98b7d167e50748c1ff6b103c40a1cfe776741f7b03e80
Median time: 1544074734
Difficulty: 4.656542373906925e-10
Confirmations: 195
Chainwork: 0000000000000000000000000000000000000000000000000000000000000010
Bits: 207fffff