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So. Cal. shaking again

Old 07-05-19, 10:48 PM
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eja_ bottecchia
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So. Cal. shaking again

Yesterday (July 4) we had a magnitude 6.4 quake. It hit just as I was finishing my ride. I was outside, walking into the garage, and it felt like I was standing on a boat. I thought my legs were just wobbly from the ride, but my dogs confirmed it: it was an earthquake.

Tonight, at 20:20 hours, PST, a 7.1 quake struck in the same area. This time the shaking was long and more severe that yesterday.

I was home watching a TdF preview on GCN.

Question: am I causing earthquakes by engaging in cycling related activities?

Be prepared, be safe.
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Old 07-06-19, 12:54 AM
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I'm sure that it was nothing you did, or ate. Remain vigilant.
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Old 07-06-19, 01:16 AM
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I know some will find it hard to believe but about a decade or so ago there was that quake out in the Pacific that resulted in a tsunami that hit Japan and did immense damage including wiping out a nuclear powerplant there.

Well I think I might've felt some of that all the way over here in inland Washington state by the Idaho border. Just before the news of the original quake was announced on my internet feed of al Jazeera news I swear I felt a faint vibration coming through my cement slab floor that got my attention and made me wonder if an electric air compressor might be running on my driveway or something . . . except I don't own any compressor nor heard one running.

Just about the following moment when I was curious enough to consider getting up and checking outside the announcement of the quake came over the news broadcast in process. I'm talking within seconds, perhaps a minute at the most.. And the tsunami hit Japan some time later on.

I know there is a fault line over in Montana somewhere but it's been dormant for some time I believe. I've also noticed that quakes in far separate parts of the world seem to come a day or so apart so I'm just wondering about what possibilities there might be that these events might not just be coincidental but actually connected enough with other fault lines to trigger a quake across the world.
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Old 07-06-19, 02:41 AM
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yeah...felt this second, larger socal quake at work. didn't feel the first one the other day.

lived in so cal my entire life and only felt three earthquakes that have made me really take notice.
the 1971 sylmar/san fernando 6.5, 1992 landers 7.3 and 1994 northridge 6.7 earthquakes. the
northridge one was especially violent with a quick, strong aftershock and a definite back and forth/sawlike shake
vs a rolling wave sensation. the duration of the episode also significantly exceeded the others.
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Old 07-06-19, 03:03 AM
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Originally Posted by Zinger View Post
I know some will find it hard to believe but about a decade or so ago there was that quake out in the Pacific that resulted in a tsunami that hit Japan and did immense damage including wiping out a nuclear powerplant there.

Well I think I might've felt some of that all the way over here in inland Washington state by the Idaho border. Just before the news of the original quake was announced on my internet feed of al Jazeera news I swear I felt a faint vibration coming through my cement slab floor that got my attention and made me wonder if an electric air compressor might be running on my driveway or something . . . except I don't own any compressor nor heard one running.

Just about the following moment when I was curious enough to consider getting up and checking outside the announcement of the quake came over the news broadcast in process. I'm talking within seconds, perhaps a minute at the most.. And the tsunami hit Japan some time later on.

I know there is a fault line over in Montana somewhere but it's been dormant for some time I believe. I've also noticed that quakes in far separate parts of the world seem to come a day or so apart so I'm just wondering about what possibilities there might be that these events might not just be coincidental but actually connected enough with other fault lines to trigger a quake across the world.
Everything is connected. We're just too close (we don't now enough) to see the big picture.

And despite ooga-booga's exaggerated emotional description, an earthquake is not like a wave. Unless that wave is made of concrete. Reminds me of the hurricane that sounds like a freight train.
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Old 07-06-19, 07:43 AM
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Originally Posted by ooga-booga View Post
yeah...felt this second, larger socal quake at work. didn't feel the first one the other day.

lived in so cal my entire life and only felt three earthquakes that have made me really take notice.
the 1971 sylmar/san fernando 6.5, 1992 landers 7.3 and 1994 northridge 6.7 earthquakes. the
northridge one was especially violent with a quick, strong aftershock and a definite back and forth/sawlike shake
vs a rolling wave sensation. the duration of the episode also significantly exceeded the others.
Your description of how you experienced these various earthquakes not only reflects my own experiences, but also reflects the reported experiences of countless witnesses.

Here is a brief, and handy description from the USGS:

https://www.usgs.gov/faqs/what-does-...ience_products

BTW, I was born in Cuba and lived in Florida for a while. I have experienced several hurricanes (and a nearby tornado in Ohio). They do sound like a roaring freight train (a steam powered one )

Be prepared, be safe.
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Old 07-06-19, 10:59 AM
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I didn't feel the one on Thursday morning. I was doing some yardwork, taking advantage of the cool overcast morning on Thursday, and didn't notice anything. I definately felt Friday evening's quake, a slow-rolling for about 1 minute so I was pretty sure it wasn't local. The bookcases and other tall stuff in my house is bolted to the walls, so no damage.

Worst I ever experienced was the Landers quake back in 1992. I was only about 10 miles away on an overnight campout atop Mt. San Gorgonio. It shook violently about 4:30am on a Sunday morning, scared the crap out of us. About an hour later there was a 6.7 even closer over near Big Bear Lake. When the sun eventually came up it was incredible to see all the dust that had been stirred up by rockslides on the slopes and canyon areas of Mt. San 'Gorgonio and the surrounding San Bernardino mountains.
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Old 07-06-19, 07:12 PM
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Originally Posted by skidder View Post
I didn't feel the one on Thursday morning. I was doing some yardwork, taking advantage of the cool overcast morning on Thursday, and didn't notice anything. I definately felt Friday evening's quake, a slow-rolling for about 1 minute so I was pretty sure it wasn't local. The bookcases and other tall stuff in my house is bolted to the walls, so no damage.

Worst I ever experienced was the Landers quake back in 1992. I was only about 10 miles away on an overnight campout atop Mt. San Gorgonio. It shook violently about 4:30am on a Sunday morning, scared the crap out of us. About an hour later there was a 6.7 even closer over near Big Bear Lake. When the sun eventually came up it was incredible to see all the dust that had been stirred up by rockslides on the slopes and canyon areas of Mt. San 'Gorgonio and the surrounding San Bernardino mountains.
Just the opposite for me. I was in bed and woken with bed on vibrate. In # 2, I was outside the supermarket looking for a shopping cart and walking back into the store to notice the momentary entrance blockade and frenzy with murmurs of earthquake. I didn't feel a thing that time and thought everybody had gone cuckoo.
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Old 07-06-19, 10:23 PM
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Originally Posted by KraneXL View Post
Reminds me of the hurricane that sounds like a freight train.
People that I've heard describe tornados that sound like freight trains were surviving a direct hit from a force 4 or 5 that took their house while they were in the basement or centrally located closet that might've been the only surviving structure. I think that's about where you'd probably have to be to hear it best and as an accurate description.

One of the YouTube videos has one making the awfullest loud humming as it must've been flapping some loose material as it destroyed a couples home topside.
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Old 07-07-19, 02:27 AM
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Originally Posted by skidder View Post
I didn't feel the one on Thursday morning. I was doing some yardwork, taking advantage of the cool overcast morning on Thursday, and didn't notice anything. I definately felt Friday evening's quake, a slow-rolling for about 1 minute so I was pretty sure it wasn't local. The bookcases and other tall stuff in my house is bolted to the walls, so no damage.

Worst I ever experienced was the Landers quake back in 1992. I was only about 10 miles away on an overnight campout atop Mt. San Gorgonio. It shook violently about 4:30am on a Sunday morning, scared the crap out of us. About an hour later there was a 6.7 even closer over near Big Bear Lake. When the sun eventually came up it was incredible to see all the dust that had been stirred up by rockslides on the slopes and canyon areas of Mt. San 'Gorgonio and the surrounding San Bernardino mountains.
didn't think about it at the time but did a big dayhike in the san gorgonio wilderness area about a week after the landers earthquake. took the vivian creek trailhead to the summit, headed west past jepson and charlton peaks to dollar lake saddle, then started to descend falls creek trail back towards the hamlet of forest falls. got about three miles down the trail and a massive rockslide had totally obliterated the trail. had already planned on doing a little cross country hiking along an easier stretch farther down the trail but this was a much harder and longer effort after an already big hike. ended up being an approx 24 mile all day hike from sunrise to sunset. family was this close to calling the authorities. on the plus side, discovered a pretty aspen grove along alger creek that i didn't know existed. didn't think there were any aspen groves on the south side on the wilderness.
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Old 07-07-19, 02:29 AM
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Originally Posted by Zinger View Post
People that I've heard describe tornados that sound like freight trains were surviving a direct hit from a force 4 or 5 that took their house while they were in the basement or centrally located closet that might've been the only surviving structure. I think that's about where you'd probably have to be to hear it best and as an accurate description.

One of the YouTube videos has one making the awfullest loud humming as it must've been flapping some loose material as it destroyed a couples home topside.
Really Zinger, why are you supporting this exaggeration? That description is most likely the result of someone's overactive imagination. It sounds great for a news bite (or better still, a fiction novel -- "the wind roared like a lion"), but the reality is greatly embellished.

I've been through multiple hurricanes, near tornadoes and grew up around freight trains. I assure you they don't sound even remotely alike. Its makes for an entering yarn, but that's all it is. Now an earthquake and a freight train? Yep, absolutely similar.
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Old 07-07-19, 03:03 AM
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God is angry.
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Old 07-07-19, 04:24 AM
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Originally Posted by radroad View Post
God is angry.
Actually he's just pretty disappointed. If he were angry, none of us would be here.
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Old 07-07-19, 04:42 AM
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Originally Posted by eja_ bottecchia View Post
Question: am I causing earthquakes by engaging in cycling related activities?
Hopping too many curbs on your bike?

Practicing some Evel Knievel jumps (Crashes)?

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Old 07-07-19, 04:59 AM
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Originally Posted by KraneXL View Post
Really Zinger, why are you supporting this exaggeration? That description is most likely the result of someone's overactive imagination. It sounds great for a news bite (or better still, a fiction novel -- "the wind roared like a lion"), but the reality is greatly embellished.

I've been through multiple hurricanes, near tornadoes and grew up around freight trains. I assure you they don't sound even remotely alike. Its makes for an entering yarn, but that's all it is. Now an earthquake and a freight train? Yep, absolutely similar.
I grew up in tornado alley and have never taken a direct hit from a force 4 or 5. And that's the only thing I've ever heard that description used for. Tearing up a house you're in at the time might seem pretty loud.

I've seen a 5 heading my way from a distance every time the lightning went off and that's the closest I'd care to get. That one broke up before it got to Amarillo. Incredible damage after I've seen twice, in Lubbock Texas and Drumright Oklahoma. The scary ones are the ones you can't see at night when the radio says they're in your vicinity.


Anyway I was compelled to go out and find the "awful howling" video on YouTube since I figured that's what you wanted to hear but didn't want to have to look for it. It picks up at about 40 seconds of this. Not trainlike but noisy. At first I thought it some learning disabled person crying. But it's the wind going through something like the roofing tarpaper or the like.
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Old 07-08-19, 03:57 PM
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Like OP I was out on the road during the first one, felt nothing (except the suffering of climbing stupid hills). I'm disconnected enough I didn't even know there was one (and hundreds of aftershocks) until we felt the Fri night one at home (wife upstairs felt it more than the rest of us did downstairs), and started googling.
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