Tuesday, July 29, 2008

Shake, Rattle and Roll

Yep, I felt the magnitude 5.4 earthquake at 11:43 a.m., but it was just a gentle 5-second roll here in Chula Vista (about 110 miles from Chino Hills).

The site http://www.data.scec.org/clickmap.html has a great map of historic Southern California earthquakes. The site says:

"Below is a clickable map of southern California, with epicenters of historic earthquakes (as far back as 1812) of particular note plotted over the background topography. Shown, too, are major highways (in tan) and the surface traces of major faults (in greenish-blue)."

Note that this map is not clickable - on the SCEC web site the map is clickable for each dot. You can read details about each earthquake shown on the map.

In the picture above, do you see the blue fault line northeast of San Diego that has only one dot on it, about where Lake Elsinore in Riverside County is? The earthquake today will be a dot about 25 miles northwest of that one dot, right near the end of that fault line.

A list for all of the Southern California earthquakes on the map is at http://www.data.scec.org/chrono_index/quakedex.html.

As you can see, the San Diego has not had many significant earthquakes in recent history. We feel all of the big ones on the San Andreas fault, but it is usually just windows rattling and a little bed-rocking. I'm not anxious to feel a "real" one.

What was I doing? Reading, of course. Looking for blog fodder. I had Facebook open and Miriam Midkiff IMed me and we chatted for a bit about earthquakes in our memories. She went off to do her thing and I played some Scramble games, then went in and watched the TV newsers and ate lunch.

1 comment:

Sharon said...

I sure felt it here, Randy! I was upstairs in the "genealogy room" when it hit. Things flew off the walls, stuff fell over, and even my clunky monitor moved. The USGS website [http://quake.wr.usgs.gov/recenteqs/Quakes/ci14383980.html] indicates it was 8 miles from my house.
Just another day in SoCal.