Fissure 17 is 1400 feet long, but not the biggest. I think fissure 8 was bigger. Most amazing thing about 17 is loud explosions. We can hear them here, several miles away. Sounds like thunder, or giant sledge hammer. This is the only fissure that had done that.
Good news is that the lava is moving away from us and towards the ocean. If it empties into ocean then it stops doing property damage and endangering any life.