By Jack Phillips A 7.0-magnitude earthquake struck off the coast of Northern California on Dec. 5, according to U.S. officials, triggering a brief tsunami warning. The U.S. Geological Survey (USGS) reported that the tremor hit about 60 miles west-southwest of Ferndale, California, a city located about 100 miles south of the California–Oregon border. “We haven’t received […]
Tag: Richter scale
The Richter magnitude scale was developed in 1935 by Charles F. Richter of the California Institute of Technology as a mathematical device to compare the size of earthquakes. The magnitude of an earthquake is determined from the logarithm of the amplitude of waves recorded by seismographs.
