USGS: ‘Although it may seem that we are having more earthquakes, earthquakes of magnitude 7.0 or greater have remained fairly constant’
'A partial explanation may lie in the fact that in the last 20 years, we have definitely had an increase in number of earthquakes we have been able to locate each year. This is because of the tremendous increase in the number of seismograph stations in the world and the many improvements in global communications'
