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 ...

How do you measure the size of a volcanic eruption? Just as seismologists measure the size of an earthquake using the Richter scale, volcanologists use an eruption magnitude scale called the ...

However, the true scale of the disaster remains unclear due to Myanmar’s ongoing civil war and a communication blackout, which have made it difficult for the outside world to fully grasp the impact.

A huge earthquake has struck the popular holiday destination the Fiji Islands today - measuring a massive 6.5 on the Richter scale at a depth of 174 kilometres (108 miles) ...

But their links were basically with the Pacific Rim countries and the initial reports indicated that the magnitude of the earthquake was an 8 on the Richter scale. Stuart A. Weinstein When the ...