Ohio Geological Fault Lines: "It is probable that most significant faults in the state, and certainly the earthquake generating ones, originate in the crystalline basement rocks that underlie Ohio. Many of these faults are thought to be ancient ones that were initially formed hundreds of millions of years ago.. They are zones of weakness that periodically experience failure in the current stress field."

Source: Seismic Center, OH Dept. of Natural Resources


















"Although northeastern Ohio is the secondmost seismically active area of the state, historic earthquakes have been confined to the greater Cleveland area, particularly east of the city. Citizens of the City of Ashtabula and Ashtabula County had never experienced an earthquake centered in their area since arrival of the first permanent European settlers in 1803. However, in 1987, a series of small earthquakes beneath the city of nearly 21,000 people dramatically elevated the community into the seismic spotlight. On July 13, 1987, a 3.8-magnitude earthquake was felt in Ashtabula and surrounding areas, much to the astonishment of residents. This event was the first of a series of felt earthquakes that has continued to the present."

Source: SEISMIC SPOTLIGHT SHINES ON ASHTABULA by Michael C. Hansen, Glenn E. Larsen, and E. Mac Swinford,Division of Geological Survey and Larry J. Ruff, University of MichiganOhio Geology, Issue 2001, Number 3.

Get map of major Ohio earthquakes: Ohio Department of Natural Resources Seismic Center

What might a geomancer have to say about northeast Ohio's changing sacred geometry?