興味が湧く vs 興味が沸く​​​​​​​​​​​​​

Question

Which kanji should we use for the phrase 興味がわく (to mean that something has caught our interest)?

Some quick googling shows that both 興味が湧く (~11m hits) and 興味が沸く (~9m hits) are widely used. Is one of them simply a typo error, or are both of them correct?

What is the difference in nuance and usage between 興味が湧く and 興味が沸く?

Answer 1

Which kanji should we use for the phrase 興味がわく

湧く. You should be able to verify this in a dictionary, such as here, #4.

What is the difference in nuance and usage between 興味が湧く and 興味が沸く?

One is spelled correctly while the other is not.