truth of the Qur'an "fire in the sea"

Lots of miracles that have been shown by Allah SWT to us. In fact, even irrational. Just like, fire in the sea. But is there really a fire in the sea?

If we think logically, that does not make sense. Fire when we flush with water will surely die. But, why is the fire in the sea that there really is very much water, can not extinguish the fire? Subhanallah, this is the sign of Allah SWT.
appears a phenomenon of cracks in the seafloor that emits lava. This lava causes the water to boil until the temperature is more than a thousand degrees Celsius. Even though the temperature of the lava was unusually high, it could not make the ocean water evaporate, and although the water was abundant, it could not extinguish the fire.

Allah speaks about this unique phenomenon, which means: "There is a sea in whose land there is fire," (Q. Ath-Thur 6).
The Prophet Muhammad SAW said, which means: "No one travels over the sea except the one who haji, the Umrah or the one who fights in the way of Allah. Verily under the sea is fire and under fire there is an ocean, "(Abu Dawud).

When this verse is revealed, the Arabs are incapable of capturing and understanding the cues of God's oath for the sake of the sea in whose land this fire exists. Because Arabs (at that time) only recognize the meaning of "sajara" as lighting a furnace to make it hot or boiling.