Like Hezbollah’s explosion in Beirut?  I can’t imagine it was as large.  The 2020 blast was started by almost 3,000 tons of ammonium nitrate are resulted in an earthquake and affected about half of Lebanon.  There were over 200 fatalities, 7,000 injuries, and over a quarter million displaced persons, and property damage of $15 billion.  But … Iran did it to itself both times.  See in the news today, “Huge explosion at Iranian port kills 5, injures hundreds,” Politico, 4-26-25.

“3rd round of nuclear talks between Iran, U.S. concludes in Oman,” i24NEWS, 4-26-25.