Question

fill in the blank to complete each statement about measuring an earthquakes magnitude. the scale is best used to measure the strength of small, nearby earthquakes. the magnitude scale is useful for measuring the strength of earthquakes of all sizes and at all distances from a seismograph.

Explanation:

The Richter scale is commonly used for small, nearby earthquakes. The moment - magnitude scale is more comprehensive for earthquakes of all sizes and distances.

Answer:

The first blank: Richter
The second blank: moment - magnitude