Concerning the article, "Experts mystified by Plainfield's earthquake swarm," (Jan. 17), about Plainfield's earthquakes being close to the Lake Char Fault. The fault zone scar that grooves to the south (Interstate 395) curves around the casinos, under Mohegan Sun, then west toward Old Lyme and Moodus (along Route 82) and is called the Honey Hill Fault. Seismic activity along this scar has been reported throughout history. Hundreds of small quakes were witnessed during the 1980s in Moodus. A magnitude 7 hit there in 1791.

An alpine geologist Dr. de Boer from Wesleyan, observed active compressive thrust faulting along Route 11-S in Salem. This is evidence of the whole terrane southeast of the fault continuing to plow and undersliver the rest of the state.

A 3D depiction can be found on p.56 in "Day Trips through Connecticut" by Gaby, 1979. Because Avalonia easily slips under the horizontal slip planes, a wide-area sound emanates to the surface as a "bang," as witnessed all along this fault. When this movement is constrained by trying to get around a blocking hidden volcano, then the pent up pressure can release a magnitude 8 quake - such as experienced off Boston, or the 1896 Charlestown disaster - perhaps near Preston or under Millstone Power Station.