This article is fascinating — apparently scientists have discovered that an earthquake greater than an 8.0 on the Richter Scale may cause errors with GPS systems. Apparently the shift in the earth may throw off GPS measurements.
Article:
http://www.dnaindia.com/scitech/1841127/report-earthquakes-greater-than-8-0-magnitude-create-gps-errors
Richter Scale
An Interesting History of the Richter Scale
Here is an interesting history on the Earthquake Early Warning system and the history of the Richter Scale.
http://www.accuweather.com/en/weather-news/history-of-the-san-francisco-e/10658668
Related articles
- Seismic Moment: The True Cost of Earthquakes (creditloan.com)
- Description of earthquakes (theearthquakeproject.wordpress.com)