If it was a bomb, where's the crater?

An exploding bomb should leave a twenty-foot-wide crater. A rocket might not leave anything nearly that size, depending on its explosive force. A seemingly undisputed video shows a huge fireball - possibly the result of the combination of the explosives and the unexpended fuel in a malfunctioning rocket. Contrary to what you see in movies, a high-explosive bomb should make a brief flash and clouds of smoke and dust.

The blast affected a parking lot (with lots more gasoline in the parked cars) but did little damage to the hospital itself. Not even Hamas has claimed there was a crater, and Al-Jazeera's overhead photo shows burned-out cars with limited impact to the surface of the lot.

https://www.aljazeera.com/news/2023/10/18/what-is-israels-narrative-on-the-gaza-hospital-explosion

CNN has broadcast a video that it concludes shows a rocket malfunctioning and falling in the vicinity of the lot.

Donal, I'm not any smarter; I've just spent more time studying the general topic.