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Old 05-02-2019, 12:54 PM   #16
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Re: What's the worst earthquake you've experienced?


I am on pretty solid ground over here. Probably sitting on same plate as Cleveland, but I have experienced two that I have noticed. One just last year --- I am at my computer and get up to check what kind of big truck is coming up my suburban street at night. Humm, don't see anything. Get back to my computer and when I get to a local news web-site, they are reporting that we just had an earthquake. That's about as bad as they get over here.
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Old 05-02-2019, 01:02 PM   #17
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Re: What's the worst earthquake you've experienced?


I am not afraid of anything ( except my Gal getting pisssed at me ) but would rather not have any ground shaking under my feet if I can avoid it.

Not a big fan of snakes either but we don't have any poisonous ones here or black widows.

Hmmn, no malaria mozquitoes, snakes, spiders, earthquakes, hurricanes, guns and shootouts >> Winnipeg is not such a bad place after all.
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Old 05-02-2019, 01:22 PM   #18
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Re: What's the worst earthquake you've experienced?


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I am not afraid of anything ( except my Gal getting pisssed at me ) but would rather not have any ground shaking under my feet if I can avoid it.

Not a big fan of snakes either but we don't have any poisonous ones here or black widows.

Hmmn, no malaria mozquitoes, snakes, spiders, earthquakes, hurricanes, guns and shootouts >> Winnipeg is not such a bad place after all.
As l long as you don't mind staying indoors most of the time, reading history.
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Old 05-02-2019, 01:41 PM   #19
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Re: What's the worst earthquake you've experienced?


10 months of winter and 2 months of bad skating.
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Old 05-02-2019, 01:42 PM   #20
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Re: What's the worst earthquake you've experienced?


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So, how about the rest of you? Anyone go through an 8.0 or bigger?
You limited your responses by your question. There has never been a 8.0 measured anywhere in the USA, except Alaska.

The other limiter on it is using the Richter scale which is a calculation of energy released, not a measurement of the shaking/damage produced. The Modified Mercalli Intensity (MMI) is the scale used for measuring the intensity of shaking produced by an earthquake.

It is possible for a lower magnitude earthquake (Richter) to have greater shaking/ground movement/damage (higher MMI) than a larger magnitude quake.
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Old 05-02-2019, 01:58 PM   #21
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Re: What's the worst earthquake you've experienced?


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You limited your responses by your question. There has never been a 8.0 measured anywhere in the USA, except Alaska.

The other limiter on it is using the Richter scale which is a calculation of energy released, not a measurement of the shaking/damage produced. The Modified Mercalli Intensity (MMI) is the scale used for measuring the intensity of shaking produced by an earthquake.

It is possible for a lower magnitude earthquake (Richter) to have greater shaking/ground movement/damage (higher MMI) than a larger magnitude quake.
Break free of the limits and tell about your worst . . . whatever the numbers may be.

Oh, yes. A lot depends on soil. When I went house hunting I took a map of places to avoid, places with soft soil. Not perfect, but so far so good. My place hasn't fallen down in the quakes I've been in so far.

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Old 05-02-2019, 03:24 PM   #22
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Re: What's the worst earthquake you've experienced?


As far as intense shaking goes, probably the South Napa quake in 2014. Iím about 15 miles (as the crow flys) from the epicenter. It was a 6.0 with a MMI of VIII.

It hit at 3:20 am. It not only shook side to side, but had a vertical movement as well. It was like the bed was a damn roller coaster. I couldnít get up, or even roll out of bed, until it was over.

I would estimate the shaking to have lasted close to 20 seconds.
But it sure feels longer than that, as you are actually experiencing it.
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Old 05-02-2019, 04:19 PM   #23
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Re: What's the worst earthquake you've experienced?


We're pretty used to quakes up here, this is what the kids in HS looked like when that quake hit. Calm, immediate action, that was properly handled; us military brats know procedure heh

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Old 05-02-2019, 05:38 PM   #24
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Re: What's the worst earthquake you've experienced?


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Originally Posted by Oso954 View Post
As far as intense shaking goes, probably the South Napa quake in 2014. I’m about 15 miles (as the crow flys) from the epicenter. It was a 6.0 with a MMI of VIII.

It hit at 3:20 am. It not only shook side to side, but had a vertical movement as well. It was like the bed was a damn roller coaster. I couldn’t get up, or even roll out of bed, until it was over.

I would estimate the shaking to have lasted close to 20 seconds.
But it sure feels longer than that, as you are actually experiencing it.
Vertical and horizontal movement ---- that is what happened in Japan and wrecked those nuclear power plants a few years ago. They were not engineered for both directions. Plus the Tsunami afterwards.
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Old 05-02-2019, 06:55 PM   #25
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Re: What's the worst earthquake you've experienced?


Quote:
Originally Posted by Oso954 View Post
As far as intense shaking goes, probably the South Napa quake in 2014. I’m about 15 miles (as the crow flys) from the epicenter. It was a 6.0 with a MMI of VIII.

It hit at 3:20 am. It not only shook side to side, but had a vertical movement as well. It was like the bed was a damn roller coaster. I couldn’t get up, or even roll out of bed, until it was over.

I would estimate the shaking to have lasted close to 20 seconds.
But it sure feels longer than that, as you are actually experiencing it.
Oh, yeah.

You experienced the opposite end of the same phenomenon I went through back in 1994, except there, I was far from the epicenter, the better part of 35 miles, or thereabout, maybe 40, have to google it.

Earthquakes make four discreet types of waves, the first are the rumble-truck ones, the next go side to side, the next go up and down and the fourth and last the the next kinda go in a circle. As the waves travel through the earth they go at different speeds and separate if they go far enough.

And by golly, the waves had separated by the time they got to me. Each in a set, with a second interregnum in between. The light poles visible did their thing: vibrate, barely visibly, then shimmy side-to-side, then hump up and down, the kinda go wild in a circl. Too bad we didn't have cell phones and cameras back then, would have been a perfect video.

In your case the waves were all on top of each other, more or less.

Been there, done that too.

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Old 05-04-2019, 08:51 PM   #26
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Re: What's the worst earthquake you've experienced?


First. We went to Yellowstone for a vacation. There was a tremor, we argued about was it an earthquake or a bear pushing on the cabin we rented. Earthquake won out.

Second, Our part of Eastern Oregon has hot springs, which are sign of possible quakes. One morning I was awoke, ending my 24 hour firehouse shift. I heard and saw the mini-blinds moving. as I was getting out of bed. I got dressed and went into the kitchen where to rest of the shift was. I asked if anyone else heard/felt the ground move. No one heard any movement of any kind. Next shift, I made sure to take my newspaper to work and tossed it on the table. The newspaper had pictures of the damage done to Hwy 82, and where the hill above the road slipped onto the the highway and into the Powder River. I do not know if there are still earthquake sensors in the area.

Third, I was on duty, watching a boring world series baseball game, with the rest of the shift. The screen moved. The other guys thought the TV was at fault. I told them it was a quake.
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Old 05-04-2019, 11:46 PM   #27
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Re: What's the worst earthquake you've experienced?


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Originally Posted by DoomsDave View Post
Oh, yeah.

You experienced the opposite end of the same phenomenon I went through back in 1994, except there, I was far from the epicenter, the better part of 35 miles, or thereabout, maybe 40, have to google it.

Earthquakes make four discreet types of waves, the first are the rumble-truck ones, the next go side to side, the next go u p and down and the fourth and last the the next kinda go in a circle. As the waves travel through the earth they go at different speeds and separate if they go far enough.

And by golly, the waves had separated by the time they got to me. Each in a set, with a second interregnum in between. The light poles visible did their thing: vibrate, barely visibly, then shimmy side-to-side, then hump up and down, the kinda go wild in a circl. Too bad we didn't have cell phones and cameras back then, would have been a perfect video.

In your case the waves were all on top of each other, more or less.

Been there, done that too.
I thought the movements depend on the fault & what it's doing. . . like slipstrike?
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