Well, this has turned out to be quite an interesting day.
It started at 4:37am when I was awoken by our bed shaking and a rumbling sound. My wife woke up a few seconds after I did and we both kind of just laid there wondering what in the world was happening. Thunder, a truck, quite a few things went through our minds, but earthquake wasn't really one of them. At least not at first.
It lasted about 20-30 seconds. At least the part we could feel. Overall it lasted more like about 20-30 minutes. The epicenter was located in Bellmont, IL, a small town just west of the Illinois/Indiana border about 120 miles east of St. Louis.
I have felt quakes before, both here in St. Louis and in Los Angeles, CA when I was living there for nearly a year. However, I am pretty darn sure that this was the most energetic quake I have ever felt. The quakes in Los Angeles were small tremors really, not more than 3.5 maybe 4.0. They happen all the time there but it was my first since I had moved there. It was also the first quake I had ever felt. I was in one prior to that, but I was a kid and my mother was driving us somewhere and I missed it.
In the LA quake, the building I was in shook for a few seconds and I sat pretty much frozen wondering what to do. I was on the 6th floor of an office building, so I really had no idea. The quake I felt here in St. Louis before was in Sept. 26 1990 and was a 5.0 magnitude. There was also a 4.2 that hit Feb. 5 1994. I'm pretty sure the one I remember was the one in September. I was sitting in my parents family room when I'm pretty sure I saw something out the window before the house started to shake. That one lasted about 10 seconds, but I remember being shook up and down in that one.
Today's quake was a distinct side to side shaking. Lots of items in the house were rattling. The most unnerving part was the length of the quake. It lasted way longer than I have ever felt one before. I had more than enough time to wonder when it was going to stop. From my initial looking around the house, nothing was damaged. The news has been saying that foundations might be damaged, but from what I can see, nothing has changed in the basement.
Since this one was pretty strong, I figured there would be aftershocks, and I wasn't disappointed. At 10:14am, we had our first "feel-able" aftershock. It registered 4.6 and has been felt by quite a few people too. It was pretty much the same as the first one. A side to side motion. It only lasted about 5-10 seconds, but was registering on seismographs for well over 7 minutes.
Now, for folks in California, this is not really news at all. In fact, apparently, since there was no severe damage and no deaths related to the earthquakes, the national news has been all but quiet about it. They mentioned "briefly" during CNN Headline News' weather report that "...the midwest has been shook with a small 5.2 earthquake..." (or something like that), then it was back to the weather and that was it.
Locally, the news has been all over this. Which is as it should be. St. Louis, although on a pretty scary fault, just doesn't really get earthquakes. Looking at the historical data from the USGS, actually ~68 since 1973, but most of them were under 3.5 and probably not really noticeable. Still, they are unusual for this area and since we are so near the New Madrid fault, the one that could go at any time and wipe out St. Louis, when one does hit, we here in St. Louis get a little nervous.
written by Dave M.
\\ tags: aftershock, earthquake, quake, usgs