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Can you chase the path of totality?

By Joanie Dugan

Posted February 15, 2024

A view of the 2017 total solar eclipse from Madras, Oregon. (NASA )

The total eclipse this April will be the largest mass travel event this year in the United States. Three hundred thousand people are expected to visit Bloomington to experience the eclipse on its path of totality, where the moon’s shadow fully covers the sun.

The path is only about 115 miles wide and crosses from Mexico, through the United States, and into Eastern Canada. The time of totality will only last about four minutes. So could you “chase” the path of totality to experience the total eclipse for longer?

“What makes it really difficult to do is that this shadow of the moon passing over the surface of the Earth, actually moves at upwards of 1,500 miles per hour,” said Jessica Warren, a lecturer in physics and astronomy at Indiana University Northwest. “So in order to chase that, to stay within the shadow, you would have to be moving at the same speed as the shadow.”

The moon’s speed increases as it passes over the Earth due to the way the Earth rotates.

“That shadow is moving at essentially supersonic speeds,” Warren said. “That shadow will be moving upwards of 2,000 miles per hour, which is partly why we only have a short time for experiencing actual totality.”

Jets, which travel at around 500 mph, can’t keep up.

“There are actually planes and certain charter flights that will sometimes try to stay within the path, and they can extend the length of totality by a few minutes, maybe, but no longer than that,” Warren said.

According to NASA, the longest period of totality during the 2017 eclipse was 2 minutes and 42 seconds. This year, the longest duration of totality is 4 minutes and 28 seconds, near Torreón, Mexico.

Warren said staying in one place is the best way to experience the eclipse. She said Indiana is lucky due to its location. Most places will experience totality for three to four minutes.

“We have a slightly longer period, about four minutes in the very central line of the totality,” Warren said.

On April 8, the moon’s shadow will cross 13 states in about two and a half hours. Total eclipses only reoccur in the same place once every 300 to 400 years.