This is a treehugger's dream scenario.
Small clusters of earthquakes happen all the time in places with no hydraulic fracing or injection wells. They usually go away after a few months to a year.
So when an earthquake cluster happens in an area where there is fracing or an injection well, the nutjobs claim the well causes the earthquake. The drillers stop whatever they're doing, and the earthquakes eventually go away, exactly the way they do if there's no well activity in the area.
The nutjobs claim "See, this proves that wells cause earthquakes."
They ignore the cases where the exact same pattern happens without any wells in the area. And they ignore the many cases where there is fracing or injecting and no earthquakes happen. They don't do any statistical analysis of fraced/injected areas vs. "pristine" areas.
The New Madrid earthquakes of 1811 produced a devastating earthquake cluster in a nearby area where no one had seen a similar cluster before or since. It's a pretty good bet there was no deep drilling in the area at the time. Want to bet that if a repeat of the New Madrid scenario happens, the nutjobs will claim it was due to drilling activity?
It's just like the nutjob preacher who was claiming that Katrina destroyed New Orleans because it was a den of Iniquity.
Besides, if the drilling activity did cause the fault to slip, isn't this a good thing? If the fault doesn't slip now, it will continue to build up energy that will cause a bigger earthquake later when it eventually does rupture.
Yow, talk about timing! 8.9 magnitude earthquake in Japan today.
Some discussion about earthquake danger in the US, including Arkansas.
There was another article suggesting that geologists didn't think the fault that ruptured in Japan could make an earthquake that bug because it wasn't long and straight enough.
By the way, if you want to make a donation of some kind, the best way will be to give cash. I've got some experience with emergency relief efforts and anything but cash usually ends up being more trouble than it's worth. The logistics of handling transportation of donated items, figuring out what to do with a small donation of material, etc. are usually more trouble than they're worth unless it's a local emergency. Even locally, it's often not worthwhile.
Be sure to give to a reputable agency, there are always scammers. I recommend the American Red Cross. Be sure to go directly to their web site. www.redcross.org. I didn't see a "earthquake relief fund" on the Red Cross web site yet, but I suspect they will put one up soon. I don't like a lot of things about the Red Cross, but they get the relief to the disaster site quickly, and don't waste a lot of money on administrative expenses. They have the contacts necessary to get things where they need to go.