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Index » Regional/Local » Elsewhere » Earthquake Page: 1, 2, 3, 4, 5, 6  Next
Post to this Topic
geoff_morphini

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Gender: Male


Posted: May 18, 2025 - 9:06am

 KurtfromLaQuinta wrote:
Where was this?



Burma https://earthquake.usgs.gov/ea...

kurtster

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Location: where fear is not a virtue
Gender: Male


Posted: May 18, 2025 - 7:25am

 KurtfromLaQuinta wrote:
 miamizsun wrote:

whatever you're doing please stop and watch this short clip
living/building near an active fault line is risky
it's just wild to actually see the ground crack open and shift
trying to imagine the scale and energy/power here is mind-blowing


listen to his brief set up and watch here
rip to those who perished

Where was this?
 
I thought that I heard Burma mentioned somewhere along the line.

I saw a roller go down the coast perpendicular to the shore from my house when I was a kid living in CdM. Right under Cameo Shores headed south to Laguna Beach. There was a set of waves (maybe 10 ?) only on land.  Several feet high, maybe a couple of hundred feet apart.  I don't remember what it sounded like, just seeing the waves sorta kept me from thinking about anything else.  No reports of damage.
Isabeau

Isabeau Avatar

Location: sou' tex
Gender: Female


Posted: May 18, 2025 - 7:21am

 geoff_morphini wrote:

I’ve always wondered how fast the surface rupture occurs, now I know. 


 I'm not sure I wanted to. It's both terrifying and compelling.
KurtfromLaQuinta

KurtfromLaQuinta Avatar

Location: Really deep in the heart of South California
Gender: Male


Posted: May 17, 2025 - 10:12pm

 miamizsun wrote:

whatever you're doing please stop and watch this short clip
living/building near an active fault line is risky
it's just wild to actually see the ground crack open and shift
trying to imagine the scale and energy/power here is mind-blowing


listen to his brief set up and watch here




rip to those who perished


Where was this?


NoEnzLefttoSplit

NoEnzLefttoSplit Avatar

Gender: Male


Posted: May 13, 2025 - 7:57am

 Coaxial wrote:

That is amazing! The way that tree jerks back is incredible. That power line tower just said no. Thanks for posting.
{#Good-vibes}


It kind of looks like the power pylon handled the acceleration but couldn't handle the deceleration when the shift stops, just as abruptly.

Red_Dragon

Red_Dragon Avatar

Location: Gilead


Posted: May 13, 2025 - 7:40am

 miamizsun wrote:

whatever you're doing please stop and watch this short clip
living/building near an active fault line is risky
it's just wild to actually see the ground crack open and shift
trying to imagine the scale and energy/power here is mind-blowing


listen to his brief set up and watch here




rip to those who perished




holy SHIT
NoEnzLefttoSplit

NoEnzLefttoSplit Avatar

Gender: Male


Posted: May 13, 2025 - 7:35am

 geoff_morphini wrote:

That is such an amazing video. It has been going around the earthquake folks for a couple of days and has created some great discussion. There was (reportedly) a guy in NZ during the M7.9 Kaikoura event who felt strong shaking and ran out of his house. The shaking knocked him down and then the surface rupture (same motion as the video) occurred, directly beneath him. The displacement was about 9 m (27 ft). Since he wasn’t attached to the ground he wasn’t ripped apart; he just went for the ride. Apparently he just ran away.

I’ve always wondered how fast the surface rupture occurs, now I know. 



we visited friends of my sister's in Kaikoura on the last trip and while the rest of the family was ok, one of them was seriously spooked by it. 
geoff_morphini

geoff_morphini Avatar

Gender: Male


Posted: May 13, 2025 - 7:31am

 miamizsun wrote:

whatever you're doing please stop and watch this short clip
living/building near an active fault line is risky
it's just wild to actually see the ground crack open and shift
trying to imagine the scale and energy/power here is mind-blowing


listen to his brief set up and watch here




rip to those who perished



That is such an amazing video. It has been going around the earthquake folks for a couple of days and has created some great discussion. There was (reportedly) a guy in NZ during the M7.9 Kaikoura event who felt strong shaking and ran out of his house. The shaking knocked him down and then the surface rupture (same motion as the video) occurred, directly beneath him. The displacement was about 9 m (27 ft). Since he wasn’t attached to the ground he wasn’t ripped apart; he just went for the ride. Apparently he just ran away.

I’ve always wondered how fast the surface rupture occurs, now I know. 

NoEnzLefttoSplit

NoEnzLefttoSplit Avatar

Gender: Male


Posted: May 13, 2025 - 7:29am

 miamizsun wrote:

whatever you're doing please stop and watch this short clip
living/building near an active fault line is risky
it's just wild to actually see the ground crack open and shift
trying to imagine the scale and energy/power here is mind-blowing


listen to his brief set up and watch here



see you later alligator!! 
Coaxial

Coaxial Avatar

Location: Comfortably numb in So Texas
Gender: Male


Posted: May 13, 2025 - 5:26am

 miamizsun wrote:
whatever you're doing please stop and watch this short clip
living/building near an active fault line is risky
it's just wild to actually see the ground crack open and shift
trying to imagine the scale and energy/power here is mind-blowing


listen to his brief set up and watch here
rip to those who perished
 
That is amazing! The way that tree jerks back is incredible. That power line tower just said no. Thanks for posting.{#Good-vibes}
miamizsun

miamizsun Avatar

Location: (3283.1 Miles SE of RP)
Gender: Male


Posted: May 13, 2025 - 3:51am

whatever you're doing please stop and watch this short clip
living/building near an active fault line is risky
it's just wild to actually see the ground crack open and shift
trying to imagine the scale and energy/power here is mind-blowing


listen to his brief set up and watch here




rip to those who perished


geoff_morphini

geoff_morphini Avatar

Gender: Male


Posted: Mar 28, 2025 - 10:27pm

 kurtster wrote:

And the southern San Andreas as well.  Northridge was one vivid example.  1994 6.7 quake, combination slip / thrust fault event which is why the devastation was so much.

The most costly American earthquake since 1906 struck Los Angeles on 17 January 1994. The magnitude 6.7 Northridge earthquake resulted from more than 3 meters of reverse slip on a 15-kilometer-long south-dipping thrust fault that raised the Santa Susana mountains by as much as 70 centimeters. The fault appears to be truncated by the fault that broke in the 1971 San Fernando earthquake at a depth of 8 kilometers. Of these two events, the Northridge earthquake caused many times more damage, primarily because its causative fault is directly under the city. Many types of structures were damaged, but the fracture of welds in steel-frame buildings was the greatest surprise. The Northridge earthquake emphasizes the hazard posed to Los Angeles by concealed thrust faults and the potential for strong ground shaking in moderate earthquakes.


Ya, not the same. Different kind of fault. 1994 not the San Andreas. M6.7 a whole different beast from a M7.7. A southern SAF rupture will be severe.

kurtster

kurtster Avatar

Location: where fear is not a virtue
Gender: Male


Posted: Mar 28, 2025 - 9:32pm

 geoff_morphini wrote:
 We are better prepared but this earthquake is an analog event to a northern San Andreas scenario.
 
And the southern San Andreas as well.  Northridge was one vivid example.  1994 6.7 quake, combination slip / thrust fault event which is why the devastation was so much.

The most costly American earthquake since 1906 struck Los Angeles on 17 January 1994. The magnitude 6.7 Northridge earthquake resulted from more than 3 meters of reverse slip on a 15-kilometer-long south-dipping thrust fault that raised the Santa Susana mountains by as much as 70 centimeters. The fault appears to be truncated by the fault that broke in the 1971 San Fernando earthquake at a depth of 8 kilometers. Of these two events, the Northridge earthquake caused many times more damage, primarily because its causative fault is directly under the city. Many types of structures were damaged, but the fracture of welds in steel-frame buildings was the greatest surprise. The Northridge earthquake emphasizes the hazard posed to Los Angeles by concealed thrust faults and the potential for strong ground shaking in moderate earthquakes.
geoff_morphini

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Gender: Male


Posted: Mar 28, 2025 - 8:20pm

https://earthquakeinsights.sub...

Here is a summary with a little more detail. These authors are knowledgeable and reputable. They also write this blog for general consumption. Bottom line- this is a bad situation. This strike-slip fault is somewhat analogous to the San Andreas or Alpine (NZ) faults, same sense of motion and similar rates of slip. The fault creates a valley where everyone lives, thus, big population centers are directly over the earthquake. The hypocenter was shallow, less than 10 km, so little energy was attenuated. To add to the problem, the valleys are full of loose (unconsolidated) sediment and prone to liquefaction. The fault has historic, large earthquakes but the infrastructure was not up to standards for that kind of shaking and foundation strength loss. We are better prepared but this earthquake is an analog event to a northern San Andreas scenario.
R_P

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Gender: Male


Posted: Mar 28, 2025 - 4:06pm

3 things to know about the deadly Myanmar earthquake
The Sagaing Fault region has a long history of devastating earthquakes

A magnitude 7.7 earthquake that struck March 28 in neighboring Myanmar turned this building in Bangkok, Thailand, into a mountain of collapsed concrete and twisted rubble, and a gargantuan task for rescue workers.

geoff_morphini

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Gender: Male


Posted: Jan 8, 2025 - 1:07pm

 NoEnzLefttoSplit wrote:

divergent or convergent?



Both, depends on the day
ScottFromWyoming

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Location: Powell
Gender: Male


Posted: Jan 8, 2025 - 4:17am

 geoff_morphini wrote:

3. I’m retired but still active, dammit




NoEnzLefttoSplit

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Gender: Male


Posted: Jan 8, 2025 - 12:42am

 haresfur wrote:


I'M NOT DEAD YET!




haresfur

haresfur Avatar

Location: The Golden Triangle
Gender: Male


Posted: Jan 8, 2025 - 12:24am

 geoff_morphini wrote:

Little known fact, 1. Rob and I came from the same program and have been friends for years, 2. He is a master educator (not a little known fact). 3. I’m retired but still active, dammit



I'M NOT DEAD YET!
NoEnzLefttoSplit

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Gender: Male


Posted: Jan 8, 2025 - 12:04am

 geoff_morphini wrote:

Little known fact, 1. Rob and I came from the same program and have been friends for years, 2. He is a master educator (not a little known fact). 3. I’m retired but still active, dammit


divergent or convergent?

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