| Measuring size of an earthquake |
|
|
|
|
|
|
|
|
|
|
|
|
| l | It was only
in the 1930's that Charles F. Richter, a |
||||||||||
| California
seismologist, introduced the concept |
|||||||||||
| of earthquake
magnitude. |
|||||||||||
| l | His original
definition held only for California |
||||||||||
| earthquakes
occurring within 600 km of a |
|||||||||||
| particular
type of seismograph (the Woods- |
|||||||||||
| Anderson
torsion instrument). |
|||||||||||
| l | Richter's
original magnitude scale (ML) was then |
||||||||||
| extended to
observations of earthquakes of any |
|||||||||||
| distance and
of focal depths ranging between 0 |
|||||||||||
| and 700 km. |
|||||||||||
|
|
|
|
|
| Sixth
Workshop on Non-Linear |
||||
| Dynamics and Earthquake Prediction |
||||
| The Abdus Salam ICTP, Miramare |
||||
| 15/10/2001 |
| 5 |