Evening Republican, Volume 23, Number 218, Rensselaer, Jasper County, 9 September 1920 — Earthquakes. [ARTICLE]

Earthquakes.

The origin of earthquakes has been traced to two principal causes, the first 0t which Is tetonlc, and the second volcanic. The former refers to move-, ments in the earth’s crust, known as faults, possibly caused by the shrinking of the Interior of the earth by mason of cooling.