It's been ready to blow for thousands of years. It'll probably be ready to blow long after we've wiped ourselves off the planet by other means.
The three eruptions happened:
2.1 million years ago
1.2 million years ago
640, 000 years ago
Consider how long we've been around and do the math on the odds. It's a long shot.
But, if you were into trends, you could say the eruption time is cut roughly in half for each subsequent eruption -- so it should have blown about 300,000 years ago, which means we're overdue by 300, 000 years.
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