North Korea cannot level Seoul. They would be able to inflict damage but no where near what people fear. Keep a couple things in mind. These are static firing positions that have been plotted for decades. They are using Soviet era technology that has had little maintenance . The US has had over a decade to refine our countermeasures for incoming indirect fire. See Iraq, Afghanistan, and Israel's Iron Dome.
Come back from fantasy land. There are nearly 100,000 KNOWN artillery positions pointed at Seoul. In less than 1 minute you would have over 1 million 152mm rounds in flight. Nothing is going to stop that, nothing.
They have been perfecting this for over 50 years.
Nice use of mouth breathing instead of posting facts.
There hundreds ok known sites with only a few that can ACTUALLY reach Seoul.
Keep in mind there are only 8,000 or so artillery systems on the border, with only a fraction of a percentage with significant range. I can't stress this enough, it's cold war cast off equipment. That means no electronically assisted reloading, no computer assisted repositioning equipment. They are old and slow guns.
Second point, that 'over 1 million 152mm rounds in flight' is just a bizarre interjection. I mean I'm sure you were being facetious, but its still a really stupid thing to say. Here is the issue at hand. The weapons that can reach Seoul are all in hardened positions. If they move into a firing position allied forces can strike them easily. These are known targets so they will be pre-assigned targets for artillery and air resources. The rest of their artillery would have to be moved into position to strike other targets. With allied advanced reconnaissance tracking them it would be a task, but very do-able task. Most importantly is that the NKs might be able to release a handful of volleys. With the significant advantage in technology in counter battery fire, those positions would be wiped out before they could inflict serious damage to major population centers.
Lets look at the 2010 artillery incident. The NK's had a 40% hit rate on Yeongpyeong island with PRE POSITIONED artillery pieces. South Korea's counter battery fire was able to inflict significant damage in response to NK aggression.
Yes it would suck to live in Seoul during the opening moments, significant, but not heavy casualties might occur, but the city will not be in flames from millions of rounds impacting.
The wildcard people don't talk about enough is the training and maintenance of their military. Yes its huge, but is not well funded or equipped. Look at Iraq Part I and II. There was a great fear of their traditional military. There were points in the invasion where it became painfully obvious the Iraqis had no idea what they were doing because they had prepositioned all their artillery to places marked in the desert by 40 gallon oil drums. American tanks literally drove around them and the Iraqis couldn't walk in their fire fast enough or efficiently enough to counter an advancing column.