Cape Tides.2

Actual Elapsed Time: 2.8 hours (10,000 seconds)

The tide rushes out of a bay on Cape Cod, Massachusetts. At normal speed, the flow of the tide can not be seen - it changes too slowly. Only by speeding up the action to 1,000 times normal speed can we see the tide flow out. The ebb and flow of the tide is caused by the moonÕs rotation around the earth. The gravitational tug of the moon distorts the height of the ocean. As the earth rotates, these "bulges" strike different parts of the planet causing tides. The position of the sun also effects the tides, though less so than the moon.

How This Clip Was Made:

This time-lapse video was created by shooting 2.8 hours of regular video. Only 1 of every 1,000 frames of video was digitized and transferred to a computer. When displayed, the remaining frames show the action at 1,000 times normal speed. Production: Bob Hone. Post-Production: Brennan Doyle.

Related Clips:

Cape Tides.1 - Actual Elapsed Time: 17 minutes (1,000 seconds)