(AP Photo/Ted S. Warren)
Great news for hikers. It's been almost two years since renewed activity within the crater caused the mountain to be shut down to hikers. Reporters got a sneak preview last week. The mountain re-opened to the public today. Here's a very cool statistic:

Near the center of the crater, the volcano is rebuilding itself, churning out a cubic yard of rock per second – a rate that could see the volcano return to its pre-1980 size in just 100 years.

On Wednesday, a 3.6-magnitude quake hit the volcano. The quake will not affect the hiking program. If you want to go, the permits are $22 each and are limited to 100 a day. Weekends are selling out quickly. Here's where you go to sign up.