From the videos of the actual explosion, number one the jet was speeding straight down at high speed, almost seems like two explosions, one after another, I'm going to guess that the natural gas source that was ignited was probably the second larger explosion, it's over six row houses now that burned, jet fuel spilled over Roosevelt Mall. Many cars on fire.
If no one else passed away on the ground that is a miracle as again on a Friday night that particular area of Northeast Philly is very very busy with restaurants, movie theater, the mall and rush hour traffic. If there are no other fatalities, that is a miracle.