Magnitudes are based on a logarithmic scale (base 10). What this means is that ... released by explosives: a magnitude 1 seismic wave releases as much energy as blowing up 6 ounces of TNT. A magnitude ...

Earthquake Magnitude Scale Magnitude Earthquake Effects Estimated Number Each Year 2.5 or less Usually not felt, but can be recorded by seismograph. Millions 2.5 to 5.4 Often felt, but only causes ...

A second earthquake measuring 4.1 on the Richter scale struck Myanmar within 24 hours on Monday, according to a statement ...