Earthquake 5.9 in Smith Valley 3:50 pm.

[Lighthawk]

Thanks for the info, Ted. Since we can't get outside with all the smoke and forest closures, this might be the best time for Julie to get her knees done. Ice that knee!

 

[teledork]

Three quakes so far this morning. I definitely felt the 2.9 and 3.8 with epicenters within sight of my house and I say "so far" because they seem to come in clusters. Some days there are none, other days serve us a 6 - 7 course meal. The 2.6 just east of Bridgeport may have been what woke me up a little after 5 am.

A couple of weeks back someone reported a count of 78 earthquakes of a minimum magnitude (I can't recall - was maybe 2 or above?) in a single week. Another week and we will have had three months of this.

I brace when I hear a truck go by on the highway and have had more than one night with little to no sleep unless I have some "white noise" (a ten hour recording of a stream)

The kind of funny thing is that I grew up in the SF Bay area. Most people think that is earthquakesville. From my experience they would be incorrect. The other kind of funny thing is that I was not at hone for the main event (although it scared the pants off of me on the shore of a lake in the backcountry) and I have still had more than enough of this.

 

[teledork]

Okay. the one that I thought may have been a continuation of #3 was a separate quake with an epicenter just down the slope from #2 and #3 and a magnitude of 3.5 so make that 4 quakes so far.

 

[Foy]

And the South Carolina Lowcountry is getting in on the act yesterday (Monday 27 September) having recorded two earthquakes of 2.9 and 3.3 magnitude near Summerville. Summerville, SC was the approximate epicenter of the regionally infamous Charleston Earthquake in 1886, estimated to have been between 6.9 and 7.3 magnitude. Not widely known is the fact that many long regional faults occur more or less parallel to the present coastline throughout the Piedmont and Coastal Plain all the way from NY into GA. Most are mapped as border faults forming grabens and half-grabens (sedimentary basins) resulting from the breakup of the supercontinent of Pangea in the Triassic. Many of them, including the Jonesboro Fault running between Raleigh and Durham, NC have several thousand feet of up-down vertical throw. Outside of the Coastal Plain, the basins outcrop as readily identifiable unmetamorphosed sedimentary rocks, mostly red sandstones and shales, with some basaltic flows, sills, and dikes. There are a slew of these "Triassic Basins" (25 or 30 or more?) up and down the East Coast and at least that many more have been identified beneath younger Coastal Plain sedimentary overlap on the mainland of VA, NC, SC, and GA and probably another dozen or two beneath the same younger rocks offshore on the Continental Shelf. The present-day SC earthquakes as well as the Charleston quake are believed to have occurred along these Triassic faults buried thousands of feet under the younger Coastal Plain rocks.

Foy

 

[teledork]

Welcome to the party, Foy!

We need some music:

 

[Casa Escarlata Robles Too]

It can be unnerving with all those small shakers.

We get a few here along the Monterey Bay as we are
about 10 miles from the San Andres fault.
Frank

 

[Foy]

Welcome to the party, Foy!

We need some music:

Why thanks very much for the serenade!

We're really not devoid of earthquakes in the East, just not a lot of big'uns. Back in August 2011, we had a 5.9 or so in the Virginia Seismic Zone located in the Piedmont around 120 miles from my Raleigh, NC home. Brought some widespread and mostly minor structural damage. I felt it plain as day--took me about 3 seconds to realize what it was--just long enough to look out my office window the the "passing truck" which wasn't there. The northwestern corner of NC had a 5.3 up in the Blue Ridge in July or August 2020--widespread and mostly minor structural damage. But the Midwest/Deep South claims the Big Daddy events east of the Rockies--the New Madrid quakes of 1811-1812. Some were estimated to have been 7.7 magnitude. Fissures opened up, widespread soil liquifaction, sand blows, Mississippi River running backward, sudden formation of 15,000 acre Reelfoot Lake due to subsidence of 1.5 to 6.0 meters along the Reelfoot Fault. Quite the series of events from December 1811 to February 1812.

Foy

 

[Casa Escarlata Robles Too]

I remember Reelfoot Lake from the "Mickey Mouse" club series, The Mystery of Reelfoot Lake.
Guess I am dating myself a bit.

The stories of the New Madrid quake are interesting.
Thanks for the geology facts/info.
Frank

 

[teledork]

Every time I think to myself; " hasn't shaken in a while" it does.

 

[Casa Escarlata Robles Too]

Big story in the Sunday SF paper about the Rodgers Creek fault in the Napa area.
It may be the next "BIG" one so they say.

Haven't felt one in my area for some time.
Maybe saying that will stir the "quake" gods.
Frank

 

[PaulT]

Have you considered that the feeling that it hasn’t shaken in a while may be a poorly developed earthquake sensor within yourself?

Perhaps, something akin to other animal’s sense that drove them away from low ground in anticipation of the incoming waves before the 2004 Indonesian quake & tsunami?

There remain things that may yet be little understood about ourselves and our world.

Paul

 

[teledork]

Have you considered that the feeling that it hasn’t shaken in a while may be a poorly developed earthquake sensor within yourself?

Perhaps, something akin to other animal’s sense that drove them away from low ground in anticipation of the incoming waves before the 2004 Indonesian quake & tsunami?

There remain things that may yet be little understood about ourselves and our world.

Paul

I often think it is shaking when it is just the sound of a truck on the highway or I feel something and just don't take the time to look it up. I know at one point the geologic survey had recorded more than 70 quakes in a particular period and I had felt about 1/3 of those - the ones which were 2.5 and on up. But yeah - I have considered how" poorly developed" I am in many arenas so thanks fo pointing that out.

I think we are just pretty much <<<<<yawn>>>>>> around here. It took several hours for the Did You Feel It page to collect any data other than the reports from me and my housemate.

 

[pvstoy]

Mexico earthquake caused waves at California's Death Valley




4,167 views Sep 21, 2022 The 7.6-magnitude earthquake which struck western Mexico on Monday caused a 1.2-meter (4 foot) seiche in Devils Hole at California's Death Valley, according to the National Park Service, which released footage of the event on late Wednesday night.


Show less

 

[ski3pin]

I was just going to post this on the earthquake in Mexico.

 

[Casa Escarlata Robles Too]

That is incredible. Just goes to show how powerful a quake can be.
Frank

 

[pvstoy]

I was just going to post this on the earthquake in Mexico.

My gal had just showed it to me and since this was a current earth quake posting threw it in.

Feel free to post on the earthquake about Mexico info and re post the vid.

 

[Lighthawk]

Mexico earthquake caused waves at California's Death Valley




4,167 views Sep 21, 2022 The 7.6-magnitude earthquake which struck western Mexico on Monday caused a 1.2-meter (4 foot) seiche in Devils Hole at California's Death Valley, according to the National Park Service, which released footage of the event on late Wednesday night.


Show less

That is amazing. I wouldn't know what to think if I saw this happen to a quiet desert pool.