What to understand/interpret from training/validation epoch loss, data

I am training a network with 3D MR-CT images.
right now I have the epoch wise loss being printed like:

The overall train and validation loss looks so far:

train and validation losses in last 15 epochs:

Overall validation loss:

The model saving criteria is minimum validation loss, so the model was last saved in epoch 30.
As the network is still training and will be so untill epoch 120. What can I interpret from these data about the network being trained