They modeled the size of seismic waves generated at hundreds of positions along the tornado's
path to determine the force necessary to create them, and then compared those waves with the intensity of the tornado throughout its lifespan.
He and colleagues created such an estimate using a computer analysis that factors in the length and width of a tornado's
In February 2007, the Fujita Scale was updated to the "Enhanced Fujita Scale." The new scale takes into account the strengths of different types of construction when assessing a tornado's
When a twister struck Huntsville, Alabama, USA, in 1989, killing 29 people, many survivors reported feeling earth tremors some time before the tornado's
A path of the tornado was outlined using a detailed map and identified portions of roadway that lay within 1.5 miles on either side of the tornado's
proprietary high throughput virtual slit (HTVS[TM]) design technique eliminates spectrometer slit losses while maintaining high spectral resolution, resulting in an order of magnitude improvement in sensitivity.
Both scales show the relationship between a tornado's
wind speed and how much damage it causes to structures.
winds can blow at speeds of more than 483 kilometers (300 miles) per hour, tossing everything in its path.
First of all, says Doswell, a tornado's
F-scale rating is based on the worst damage found anywhere along its path.