How did Pompeii disappear?

The ancient city of Pompeii was destroyed by mudflow. At that time, flash floods broke out due to weather conditions. These flash floods carried countless stones and formed a very powerful stone flow. It was this stone flow that completely buried the entire ancient city of Pompeii. The ancient city of Pompeii actually existed, because after all, scholars at that time also discovered records about this ancient city when looking through Roman history books. The ancient city of Pompeii actually has a history of 1,900 years ago. At that time, it was located southeast of Rome. This ancient city was close to the Bay of Naples, and there was also the relatively steep Vesuvius volcano next to it. If no accidents occur, the 20,000 people in this ancient city should live here for a very long time, and their lives will be relatively stable. But in AD 79, a devastating disaster completely destroyed Pompeii. At that time, the people were living a stable life, and suddenly the volcano next to the ancient city erupted. At that time, the volcano was billowing thick smoke, and countless sparks flowed down from the top of the mountain. You must know that the temperature of volcanic lava is very high, so it is extremely destructive. Along with the eruption of volcanic lava, explosions also began to sound. Since the volcano erupted at the top of the mountain, the sparks had turned into stones when they hit the ground. A lot of volcanic ash condensed on these rocks, and it rained heavily not long after. Heavy rains combined with these rocks caused complete flash floods. Because the incident occurred suddenly, all local people died in the flash flood. The entire ancient city of Pompeii was buried by flash floods, and Pompeii has completely disappeared from history. Later, those historians accidentally discovered records about Pompeii in Roman history books. In the early 18th century, Italian farmers accidentally discovered some ancient Roman coins at Mount Vesuvius. It was these coins that confirmed the existence of Pompeii. So after that, people also began to excavate the ancient city of Pompeii.