When a 7.7 Magnitude quake hit Myanmar yesterday - in pictures

[richard_smith237]

1 hour ago, Rampant Rabbit said:

could even be amplified on BKK "soil type" alluvial 

 

This is exactly why the quake was amplified in in Bangkok compared to nearby regions.

 

Seismologists sometimes call this problem the "Mexico City Effect" - and Bangkok is often used as another example in modern textbooks because the physics are almost the same.

 

 

Depending upon how the quake occurred impacts the type of wave and even the direction of dissipation of energy impact how the quake is felt at distance.

 

The magnitude of the 7.7Mw estimated to be between 4-5 in Bangkok due to the dissipating of energy through the bed rock, which was then amplified by the 'basin effect' of Bangkoks 'bowl' lakebed setting....  effectively like shaking a bowl of jelly.

 

In layman's terms the quake in Bangkok was a 4-5 LM Magnitude wobble, where as in area's such as Pattaya and throughout the Korat Plateau the energy of the all waves would have dissipated within the older much harder formations.

 

 

Much of how Bangkok was impacted also depends upon how the waves travel, the type of wave, and intensity each individual type, and direction of the movement. 

 

Body Waves (move through the inside of the Earth)

P-Waves (Primary Waves), these are fastest type of seismic wave and move in a push-pull (compressional) motion, like a slinky. These are the first to be detected by seismographs.

 

S-Waves (Secondary Waves), slower than P-waves, move in a side-to-side (shear) motion, perpendicular to the direction of wave travel. These cause more damage than P-waves because of their stronger movement.

 

Surface Waves (move along the surface of the Earth)

Love Waves, which move the ground side-to-side, like a snake, only travel along the surface. Usually cause a lot of damage to buildings.

 

Rayleigh Waves, which move the ground in a rolling, elliptical motion (like ocean waves). Slowest of all seismic waves, and cause both up-and-down and side-to-side shaking.

 

 

 

[Tippaporn]

5 minutes ago, richard_smith237 said:

 

This is exactly why the quake was amplified in in Bangkok compared to nearby regions.

 

Seismologists sometimes call this problem the "Mexico City Effect" - and Bangkok is often used as another example in modern textbooks because the physics are almost the same.

 

 

Depending upon how the quake occurred impacts the type of wave and even the direction of dissipation of energy impact how the quake is felt at distance.

 

The magnitude of the 7.7Mw estimated to be between 4-5 in Bangkok due to the dissipating of energy through the bed rock, which was then amplified by the 'basin effect' of Bangkoks 'bowl' lakebed setting....  effectively like shaking a bowl of jelly.

 

In layman's terms the quake in Bangkok was a 4-5 LM Magnitude wobble, where as in area's such as Pattaya and throughout the Korat Plateau the energy of the all waves would have dissipated within the older much harder formations.

 

 

Much of how Bangkok was impacted also depends upon how the waves travel, the type of wave, and intensity each individual type, and direction of the movement. 

 

Body Waves (move through the inside of the Earth)

P-Waves (Primary Waves), these are fastest type of seismic wave and move in a push-pull (compressional) motion, like a slinky. These are the first to be detected by seismographs.

 

S-Waves (Secondary Waves), slower than P-waves, move in a side-to-side (shear) motion, perpendicular to the direction of wave travel. These cause more damage than P-waves because of their stronger movement.

 

Surface Waves (move along the surface of the Earth)

Love Waves, which move the ground side-to-side, like a snake, only travel along the surface. Usually cause a lot of damage to buildings.

 

Rayleigh Waves, which move the ground in a rolling, elliptical motion (like ocean waves). Slowest of all seismic waves, and cause both up-and-down and side-to-side shaking.

 

 

 

 

Though one may not have a degree in this science one can easily agree based on common sense alone.

[ExpatOilWorker]

The earthquake response team leader at Boonthavorn today.

 

[Buffy Frobisher]

19 hours ago, Sierra Tango said:

I question your logic. The magnitude of an earth quake is a single value measured at the epicenter. This describes the size of the EQ at it's source. Shocks or tremours at various further distances are not measured in magnitude.

 

Check this USGS map. Click on the box top-right above the key, and turn on the MMI Contours, Stations, and Intesity under Shakemap options. Then zoom in on Bangkok. Each dot represents a measuring device, and if you click on a dot and it will show you the magnitude it measured. It varied quite a lot across the city.

 

https://earthquake.usgs.gov/earthquakes/eventpage/us7000pn9s/map

 

 

 

 

[richard_smith237]

13 minutes ago, Buffy Frobisher said:

 

Check this USGS map. Click on the box top-right above the key, and turn on the MMI Contours, Stations, and Intesity under Shakemap options. Then zoom in on Bangkok. Each dot represents a measuring device, and if you click on a dot and it will show you the magnitude it measured. It varied quite a lot across the city.

 

https://earthquake.usgs.gov/earthquakes/eventpage/us7000pn9s/map

 

 

Also note the values are in MMI (Modified Mercalli Intensity)..... 

Bangkok ranged  between IV, V and VI

Equivalent to ML: 3.5 – 4.0 / ML: 4.0 – 4.9 / ML: 5.0 – 5.9

 

Behaviourally (i.e. based on observation) the quake can be measured up to VII, (Very Strong): Equivalent ML: 6.0 – 6.9 

Everyone feels it, many people run outdoors, substantial damage (e.g., walls cracked, some structural damage). 

 

This is higher than the calculated ML equivalency posted yesterday (between 4 and 5 ML) but corresponds with some of the structural building damage we are seeing in photos yesterday and today.

 

 

 

 

[johnnybangkok]

22 hours ago, natway09 said:

.

The only good thing that hopefully comes out of this is that the Junta's brains have been jolted into some form of realism

I wouldn’t hold your breath

Myanmar junta continues air strikes after devastating earthquake https://www.bbc.com/news/articles/cy7x7r8m3xlo

[fondue zoo]

17 minutes ago, johnnybangkok said:

I wouldn’t hold your breath

Myanmar junta continues air strikes after devastating earthquake https://www.bbc.com/news/articles/cy7x7r8m3xlo

 

Whilst at the same time asking for foreign aid.

Putting that aside, what’s just as infuriating is a regime worth billions, built on years of industrial-scale corruption, that asks for financial aid.

 

[fondue zoo]

23 hours ago, hotchilli said:

This could be the aftermath in Thailand, but will the government take note and force construction standards...

 

Yeah, that's the thing, there are already comments online about how many buildings are playing things down, uncooperative juristic offices, etc. 

There is going to be strong push back when it comes to buildings being red tagged. 

 

[fondue zoo]

21 hours ago, steven100 said:

Very sad and tragic for Myanmar ,   they have to bear the brunt of the Junta military shooting the young in the streets daily and now this. 

 

What devastation they have suffered for the past 5 years since the murderous military took over. 

Very heartbreaking to see these images of destruction.

 

God help Myanmar .....     

 

 

The big guy knew it was going to happen so.. what is the deal here?  could of at least saved the kids, just saying.

Possessing omniscience and omnipotence is a heck of a thing when you don't use them.

 

 

[Unamerican]

20 hours ago, MikeandDow said:

Well it moved yesterday  people dead  buildings damaged

Which has little effect on the low nature of this frequency, 

[KhunLA]

https://www.facebook.com/reel/638970878987125

[ExpatOilWorker]

12 minutes ago, KhunLA said:

https://www.facebook.com/reel/638970878987125

Fake, AI generated.

[KhunLA]

5 minutes ago, ExpatOilWorker said:

Fake, AI generated.

maybe ... never been to that part of Myanmar 

[hotchilli]

8 hours ago, ExpatOilWorker said:

It would be interesting to see the details of that 2021 mandate, but I sincerely doubt it is anything near the kind of rigorous standards Japan has.

There are far more newer buildings on the list of 38 damaged buildings in Bangkok. Maybe because newer buildings are taller, but it could also be that older, pre-'97, buildings were over engineered, simply because computer models and design s didn't exist at the time.

Was watching a documentary yesterday on the Miami building collapse... it seems they used a similar concrete prefabricated panel method as the Bangkok Chinese condo development.

This has a tubular construction as apposed to solid construction.

Made for cheapness in less materials used and more lightweight, supposedly ideal for high rise buildings.

The Bangkok condo collapse being built by Chinese & Italian developers were using the same panels.

 

[hotchilli]

6 hours ago, watchcat said:

 

I doubt it. they'll still use pople  from Cambodja and Mianmar because they're cheap labour wich is important for the Hi-So's.

That's the workforce, compounded by Chinese made construction materials/methods.

[steven100]

So how is the US going to help   ?    they talk bs ...    help my ass   !

 

[steven100]

Russia,  China,  Hong Kong, Malaysia, India,  Singapore & New Zealand and Australia

 

are sending either search and rescue teams with specialised equipment and dogs or humanitarian aid like tents, medical supplies, food, water and other urgent necessities.

 

The USA   =    nil  

[TedG]

On 3/29/2025 at 5:15 PM, steven100 said:

We don't hear of anyone helping Myanmar ....  certainly not the USA,  not Thailand,  and not even China.

 

Despicable thieving governments, the whole damn lot of them.   

https://www.aljazeera.com/news/2025/3/30/foreign-aid-rushed-to-quake-hit-myanmar-as-more-than-1600-killed

 

Myanmar’s neighbours – including India, China, Malaysia, and Singapore – dispatched aircraft and warships carrying relief supplies and rescue teams. Thailand, where at least 18 people died due to the earthquake, also sent aid to Myanmar.

[steven100]

4 minutes ago, TedG said:

https://www.aljazeera.com/news/2025/3/30/foreign-aid-rushed-to-quake-hit-myanmar-as-more-than-1600-killed

 

Myanmar’s neighbours – including India, China, Malaysia, and Singapore – dispatched aircraft and warships carrying relief supplies and rescue teams. Thailand, where at least 18 people died due to the earthquake, also sent aid to Myanmar.

yes ... Thank you Ted,  didn't you see my last post and a couple before that.  

[steven100]

[fredwiggy]

23 minutes ago, steven100 said:

Russia,  China,  Hong Kong, Malaysia, India,  Singapore & New Zealand and Australia

 

are sending either search and rescue teams with specialised equipment and dogs or humanitarian aid like tents, medical supplies, food, water and other urgent necessities.

 

The USA   =    nil  

What is your country doing?

[fredwiggy]

Looks like the US is going to help, along with others..............https://www.yahoo.com/news/no-rescue-workers-sight-death-134113514.html

[steven100]

6 minutes ago, fredwiggy said:

Looks like the US is going to hep, along with others..............https://www.yahoo.com/news/no-rescue-workers-sight-death-134113514.html

so please explain how the US will assist Fred,   we're all dying to hear    !!

 

maybe they'll go to Walmart and buy 20 tents and carry them in their back packs hey ...  Lol

[steven100]

8 minutes ago, fredwiggy said:

Looks like the US is going to hep, along with others..............https://www.yahoo.com/news/no-rescue-workers-sight-death-134113514.html

 

hasn't USAID been cancelled Fred  ?     didn't Trump sack them all last week  ?  

[fredwiggy]

1 minute ago, steven100 said:

so please explain how the US will assist Fred,   we're all dying to hear    !!

 

maybe they'll go to Walmart and buy 20 tents and carry them in their back packs hey ...  Lol

Maybe read the link?

[fredwiggy]

Just now, steven100 said:

 

hasn't USAID been cancelled Fred  ?     didn't Trump sack them all last week  ?  

Cutbacks isn't cancelled.

[steven100]

1 minute ago, fredwiggy said:

Cutbacks isn't cancelled.

 

so this isn't correct then Fred   ?     Eliminated usually means ' to get rid of '  or terminate.  

 

[steven100]

someone's telling porkies Fred  .....     

[fredwiggy]

Just now, steven100 said:

 

so this isn't correct then Fred   ?     Eliminated usually means ' to get rid of '  or terminate.  

 

So many think they know what goes on in the US by only reading a few stories, many of them opinions, and judging by that, without ever putting one foot down in let alone staying in the US for any amount of time. I've never been to the UK, yet, and can only go by stories of what happens there, so I won't assume.

[hotsun]

11 minutes ago, steven100 said:

so please explain how the US will assist Fred,   we're all dying to hear    !!

 

maybe they'll go to Walmart and buy 20 tents and carry them in their back packs hey ...  Lol

You sound like a homeless person that people stopped giving money to. Embarrassing to all euros