Please look into this link
I could go into it in some detail but if you know where the man made lakes are or the Oil/Gas it pretty much accounts for all the earthquakes.
Alabama is notoriously geologically quiet.
Do note that something is going on in Dekalb county that is odd. I don't know what it is. It could be entirely natural or something man made. There are no big lakes where the earthquake occurred last year near Ft. Payne.
There is one man made thing at Ft. Payne that might account for it though. The Alabama Highway department built an enormous fill for a roadway )Al Highway 35) west of town. This is a ramp which at maximum depth is 1100 feet deep. It is about 2 miles long and supports a 4 lane divided highway. I don't think it is the cause but ?? Frankly I am suspecting something natural in the Jackson County/Dekalb County area of Alabama. The quake was about 15 miles east of the fill on Hwy 35.
Alabama is the site of 1500 square miles of man made lakes (Most in USA) These date from about 3 building eras (1930's USTVA big lakes in the north) (Alabama Power building in the 1950's and 1960's scattered) and (US Army Corps of Engineers 1940's / 1930's navigation facilities scattered) There really is not much of a place where you could miss a big lake except the 7 or 8 southern counties near Mobile and about 2 counties deep along the Florida Alabama border. The Oil Industry is going since the mid 1980's in the 7 or 8 counties near Mobile. This accounts for Mobile, Baldwin, Washington, Crenshaw, Green and Atmore Counties primarily. Brewton is a city included as well. The extraction of oil and gas really got going about 1988 in south Alabama and the Gas Production took off about 1993. This is the largest US Gas production field. It is part of an area holding about 95 Billion Barrels of oil and it is considered to be a gas field because almost all of the energy there is natural gas.
What will kill you about this link is that the causes for several quakes are known and noted!
Most of the big lakes in north Alabama are responsible many quakes. I don't think that seismic data could be considered very accurate or so before about 1950. But I do know that the area has been monitored for a very long time. I think the Alabama data would pretty much rebut the expert from California who argued against your report. Alabama just isn't very much of a seismic area until oil extraction or big lakes are placed there.