Sieberg scale
The Sieberg scale , named after the German geophysicist August Heinrich Sieberg , describes the strength of submarine earthquakes on a six-part scale . Similar to the Mercalli scale, it is based on macroseismic observations.
| step | description |
|---|---|
| I. | Slight, barely noticeable trembling of the ship |
| II | Slight shaking of the ship |
| III | Jerky shaking of the ship |
| IV | Ship begins to sway |
| V | "Groan" of the ship, larger objects fall over |
| VI | The hull is damaged, risk of sinking |