Loudest explosion I've ever heard, probably because it was high in the air and not at ground or near ground level. I was about 400 feet above sea level on a cliff above the Golden Gate & the report carried for a very longer way - I could hear it decaying for nearly a minute.
Delayed Sound
Observation
Yes
Remarks
See above. For some reason I turned to look in the direction where the fireball appeared just as it streaked through the sky, and seconds later the explosion was heard.
Persistent train
Observation
No
Duration
-
Length
-
Remarks
-
Terminal flash
Observation
No
Remarks
-
Fragmentation
Observation
Yes
Remarks
Possibly saw fragmentation - it was so bright that it kind of obscured details, and then it disappeared behind the hills.