Tag Archives: earthquakes

Out & About—Fault Line Park in downtown San Diego

Out & About San Diego

There is a park in downtown San Diego named “Fault Line Park.” It is split in two by a fault associated with the Rose Canyon Fault Zone. They are so proud of the fault that they have created a walkway on top of it and, on either side, is a huge mirrored ball.

Fault Line Park, San Diego, California

The balls were installed exactly opposite each other, but the eastern ball is slipping southward, and the western ball is slipping northward. In the western ball is a hole through which you can look to see if the two balls still are lined up exactly.

Fault Line Park, San Diego, California

Fault Line Park, San Diego, California

They are right now since the park was built in 2014, and the slippage is only 1 mm/year.

Quite interesting.

Of course, I did take a selfie in each mirrored ball.

Fault Line Park, San Diego, California

Fault Line Park, San Diego, California

I'm Zoey the Cool Cat, and I approve this post

Footstomping earthquakes

I created earthquakes….You can too!

Out & About

Pictures copyright 2012 Russel Ray Photos

Earthquakes are part of life in Southern California. On any given day there can be several hundred earthquakes, most of them magnitude 2.0 or smaller. Those between magnitude 3.0 and 3.9 are usually called “small tremblors” or “shaking.” Not until they reach 4.0 do they make the headline news.

A couple of days ago when I was at the Mission Trails Regional Park Visitor Center, I found a real time, streaming earthquake display:

Live-streaming earthquake display at Mission Trails Regional Park Visitor Center in San Diego, California

Pictures copyright 2012 Russel Ray Photos

That shows any number of earthquakes in real time being detected by the ANZA Seismic Network. ANZA has dozens of seismic stations throughout Southern California and is operated by the University of California at San Diego. It uses state-of-the-art broadband and strong motion sensors with 24-bit data loggers combined with real-time telemetry to monitor seismicity.

The station at the Visitor Center is so sensitive that stomping your foot can “create” an earthquake. I created two of them, which you can see as two spikes on the first data line in the upper right-hand corner. Here’s a close-up of my two earthquakes:

Footstomping earthquakes

Pictures copyright 2012 Russel Ray Photos

I had to wait in line because there were a bunch of children creating their earthquakes. Then I had to let all of their earthquakes get off the data line so that my earthquakes would show clearly.

The Visitor Center at Mission Trails Regional Park has to be one of the best visitor centers anywhere! I’ll have more about the Visitor Center and the Park in future posts.

Location of the Mission Trails Regional Park Visitor Center

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Pictures copyright 2012 Russel Ray Photos

I'm Zoey the Cool Cat, and I approve this post

Looking for real estate services in San Diego County?
I can highly recommend James Frimmer,
Realtor Century 21 Award, BRE #01458572

If you’re looking for a home inspector,
I recommend Russel Ray — that’s me!Real Estate Solutions

Pictures copyright 2012 Russel Ray Photos

Right here in urban San Diego….

Pictures copyright 2012 Russel Ray Photos

Out & About San Diego

 

Friends back in my native Texas, in the East Texas Piney Woods, experienced a 4.3 earthquake a few days ago. They were rockin’ ‘n’ rollin’, and there were no Beatles involved. I read reports of fallen pictures and things knocked from shelves. Out here, of course, most of us would never suffer that kind of damage from a 4.3 earthquake. Pictures are hung with earthquake hangars and things we don’t want knocked from shelves in minor earthquakes are appropriately attached to the shelves with earthquake goop or earthquake tape.

I have always been fascinated by earthquake faults. I wrote my first term paper on earthquakes in 1969. I was 13 and wrote it for a customer of my typing/research enterprise. He was a sophomore at Texas A&I University, and he (I) got a B+ on that paper!

Television documentaries showing a helicopter flying over a fault zone, usually the San Andreas Fault somewhere in remote California, would enthrall me.

Right here in urban San Diego is the Rose Canyon Fault:

Southern California showing Rose Canyon Fault

 

Seismic experts say the Rose Canyon Fault has the potential to unleash a 7.5 earthquake. As you can see on the map, the Rose Canyon Fault goes right underneath downtown San Diego. When that 7.5 earthquake happens, I’m sure it will be considered “the big one” as far as San Diegans are concerned.

If you know where to go, you can actually see the Rose Canyon Fault on the ground surface.

Rose Canyon Fault Zone

 

Using the descriptions in the picture above, here is the “50 million year old Eocene sandstone of the Scripps Formation”:

Eocene sandstone of the Scripps Formation

 

Notice the houses, too, built right on top of that sandstone formation. Their foundation pillars probably go pretty deep.

On the other side of the canyon is the “half-million year old Pleistocene conglomerate,” which the pine trees seem to like.

Half-million year old Pleistocene conglomerate in Rose Canyon

 

In between the two formations is “a major strand of the Rose Canyon Fault”:

Rose Canyon Fault

 

Considering the location of the baseball field, I guess it was built by some parents with unruly children.

Specific location:

Location of rose canyon fault

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I'm Zoey the Cool Cat, and I approve this post

Pictures copyright 2012 Russel Ray Photos

Looking for real estate services in San Diego County? I can highly recommend
James Frimmer, Realtor with Century 21 Award, DRE #01458572

If you’re just looking for a home inspector,
I can highly recommend Russel Ray; that’s me!Real Estate Solutions