HP 46 User Manual

Logarithms can be particularly helpful to the scientist and the engineer.
For instance, the Richter scale, used by seismologists to measure the
magnitude of earthquakes, operates on a logarithmic basis so there is a
10-fold increase from one unit to the next.
B. The 1906 San Francisco earthquake, with a magnitude of 8.25 on
the Richter scale is estimated to be about 105 times greater than
the Nicaragua quake of 1972. What would be the magnitude of the
latter on the Richter scale?
Press: 8.25
oIM—<zZm
1 Be25 +
10500 18
6e23 o
105w - ()
LOG
32

HP 46 Specifications

General

Brand	HP
Model	46
Category	Calculator
Language	English