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 ...

There are a number of ways to measure the magnitude of an earthquake. Most scales are based on the amplitude of seismic waves recorded on seismometers. These scales account for the distance between ...

A 3.8 magnitude earthquake from York Harbor, Maine, was felt in the northeast corner of Connecticut Monday morning, according ...

By Emily Burnham, Bangor Daily News Staff Though Maine is quiet seismologically compared with hotspots like California, ...

A magnitude 2.8 earthquake jolted the Los Angeles area Monday morning, sending weak shaking from its epicenter in Alhambra. "Weak" shaking, as defined by the Modified Mercalli Intensity Scale ...