Really. A Texas earthquake. September 15, 2007.
Missed it? Well, it was at the dinner hour, 06:16:42 PM (CDT). You may have thought it was Bubba’s great sauce for the barbecue, or the raspberry in the iced tea.
US Geological Survey provides a state-by-state listing of latest earthquakes. Texas is not a particularly active zone — but there are quakes, even here.
This last one, just over a week ago, was a 2.7 on the Richter scale, too weak to merit much news coverage even in the flatlands. It shook Milam County and surprised people there, but it didn’t do much damage:
In terms of destruction, the earthquake was hardly significant.
Emergency responders said they knew of only one report of damage: A teapot fell off of a woman’s stove.
In California, people probably wouldn’t have even noticed the tremor. But this earthquake happened in the Lone Star State and left Brazos Valley residents baffled.
“You just don’t expect your house to shake,” said Burleson County resident Karen Bolt. She was in her trailer home cleaning dishes when the temblor began.
USGS provides more details than you can use:
| Magnitude | 2.7 |
|---|---|
| Date-Time |
|
| Location | 30.74N 96.74W |
| Depth | 5.0 kilometers |
| Region | CENTRAL TEXAS |
| Distances | 35 km (20 miles) W of Bryan, Texas 65 km (40 miles) ENE of Taylor, Texas 110 km (70 miles) ENE of AUSTIN, Texas 170 km (105 miles) NW of Houston, Texas |
| Location Uncertainty | Error estimate: horizontal +/- 16.2 km; depth fixed by location program |
| Parameters | Nst=4, Nph=4, Dmin=123.3 km, Rmss=1.25 sec, Erho=16.2 km, Erzz=0 km, Gp=130.4 degrees |
| Source | USGS NEIC (WDCS-D) |
| Remarks | Felt in the Caldwell-Rockdale area. |
| Event ID | ushhc |
Still, Texans should be relieved it was a small one. The largest recorded Texas earthquake was in 1931, with an epicenter near Valentine. At 5.7 magnitude and VII intensity, it nearly destroyed the little town of Valentine.
In terms of magnitude and damage, this is the largest earthquake known to have occurred in Texas. The most severe damage was reported at Valentine, where all buildings except wood-frame houses were damaged severely and all brick chimneys toppled or were damaged. The schoolhouse, which consisted of one section of concrete blocks and another section of bricks, was damaged so badly that it had to be rebuilt. Small cracks formed in the schoolhouse yard. Some walls collapsed in adobe buildings, and ceilings and partitions were damaged in wood-frame structures. Some concrete and brick walls were cracked severely. One low wall, reinforced with concrete, was broken and thrown down. Tombstones in a local cemetery were rotated. Damage to property was reported from widely scattered points in Brewster, Jeff Davis, Culberson, and Presidio Counties. Landslides occurred in the Van Horn Mountaiins, southwest of Lobo; in the Chisos Mountains, in the area of Big Bend; and farther northwest, near Pilares and Porvenir. Landslides also occurred in the Guadalupe Mountains, near Carlsbad, New Mexico, and slides of rock and dirt were reported near Picacho, New Mexico. Well water and springs were muddied throughout the area. Also felt in parts of Oklahoma, New Mexico, and in Chihauhua and Coahuila, Mexico.
Texas history courses could make some use of these data, for map reading exercises, and for general geography about the state. Click on the map below, the isoseismal map of the 1931 Valentine, Texas quake, and geography teachers will begin to dream of warm-up exercises right away.
Millard Fillmore's Bathtub 
You can track down individual quakes here:
http://earthquake.usgs.gov/eqcenter/
LikeLike
I have experienced tremors from earthquakes in the past few weeks
I would like to know a site I can go to (I love in central Austin, Texas) to look these up or possibly post when I experience one
Thank you
Dixie Boyd
LikeLike
[…] Meanwhile, the Dallas area has had a series of real earthquakes over in the end of this week. The biggest was about 3.0 on the Richter Scales, barely detectable to most people. But this is big stuff around here. We sit on some of the most geologically stable land in North America. Earthquakes are rare, and usually small. […]
LikeLike