 This leads to a number of problems including the short period (in geological timescales) for which there are records, the difficulty of assessing the characteristics of earthquakes that occurred prior to the use of seismometers, the difficulty of identifying the existence of all earthquakes that pre-date the historic record, and ultimately the reliance on one single earthquake scenario.Other criticisms include the use of intensity in the evaluation method, rather than spectral acceleration, which is commonly used elsewhere.Following the 2011 Fukushima I nuclear accidents, an OpinionWay poll at the end of March found that 57% of the French population were opposed to nuclear energy in France.